44 results on '"Yunxia Ping"'
Search Results
2. Dimension Effects of Graphene Sheets as Building Blocks: Implications for Thermal Conductivity Improvement of Graphene Films
- Author
-
Zhuoran Li, Peng He, Yunxia Ping, Na Guo, Xianzhe Zeng, Siwei Yang, and Guqiao Ding
- Subjects
General Materials Science - Published
- 2022
3. Introduction of amorphous TiO2 coating layer to improve the lithium storage of SiO2 nanospheres anode
- Author
-
Mengzhao Ding, Jianguang Zhai, Panjing Zeng, Chaomin Zhang, and Yunxia Ping
- Subjects
General Chemical Engineering ,General Engineering ,General Physics and Astronomy ,General Materials Science - Published
- 2022
4. Optical amplification for measuring minute displacement of laser beam
- Author
-
Chaomin Zhang, Xuemei Li, Pengfei Zhu, Kun Zhu, Yunsheng Bi, Yunxia Ping, Pei Song, and Xiaohui Sun
- Subjects
Measurement method ,Materials science ,Optics ,business.industry ,Physics::Accelerator Physics ,Physics::Optics ,Displacement (orthopedic surgery) ,Physics::Atomic Physics ,business ,Atomic and Molecular Physics, and Optics ,Laser beams - Abstract
This paper proposes an optical amplification method of measuring the minute displacement of a laser beam. The relationship between the displacement of the incident laser beam and the reflective bea...
- Published
- 2021
5. Luminescence of Cr3+/Yb3+ co-doped oxyfluoride silicate glasses for crystalline silicon solar cell down-conversion devices
- Author
-
Yunxia Ping, Zhangwen Li, Jinan Xia, Chaomin Zhang, and Wenbin Fu
- Subjects
010302 applied physics ,Materials science ,Photoluminescence ,Process Chemistry and Technology ,Analytical chemistry ,Energy-dispersive X-ray spectroscopy ,02 engineering and technology ,021001 nanoscience & nanotechnology ,Fluorosilicate glass ,01 natural sciences ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,Amorphous solid ,0103 physical sciences ,Materials Chemistry ,Ceramics and Composites ,Germanate ,Photoluminescence excitation ,Crystalline silicon ,Fourier transform infrared spectroscopy ,0210 nano-technology - Abstract
Oxyfluoride silicate glasses co-doped with Cr3+ and Yb3+ ions were fabricated in this work. High △T (178–214 °C) value demonstrated that the thermal stability of the prepared glasses were better than tellurite and germanate glasses. X-ray diffraction (XRD) curves proved the amorphous nature of the glasses, the energy dispersive spectroscopy (EDS) analysis and Fourier Transform infrared spectroscopy (FT-IR) curves explored the network structure of glasses. The photoluminescence excitation (PLE) and photoluminescence emission (PL) spectra show that the glasses absorption peaks located at 430 nm (Cr3+:4A2g - 4T1g (P)) and 627 nm (Cr3+:4A2g - 4T2g), while the emission peak close to 1010 nm (Yb3+:2F5/2 -2F7/2), which meets the condition of energy down-conversion. Besides, the energy transfer efficiency (ηCET = 33.5%) and the quantum cutting efficiency (ηQE = 133.5%) were calculated from the measured decay curves. These values were higher than Cr3+/Yb3+ co-doped fluorosilicate glass with incorporating of CaF2 (21.5% and 123.5%) and Tb3+/Yb3+ oxyfluoride glass (13.5% and 113.5%), indicating the prepared samples are conducive to the energy transfer from Cr3+ to Yb3+ ions. The experimental results reveal that the oxyfluoride silicate glasses have potential application prospects in crystalline silicon (c-Si) solar cells.
- Published
- 2020
6. Dimension Effects on Thermal Conductivity of Graphene Films Revealed by Experimentally Calibrated Multiscale Modeling
- Author
-
Zhuoran Li, Peng He, Yunxia Ping, Na Guo, Xianzhe Zeng, Siwei Yang, and Guqiao Ding
- Published
- 2022
7. 2.0-µm and 4.1-µm mid-infrared broadband emission enhancement in Ho3+/Yb3+ co-doped tellurite–germanate glasses
- Author
-
Yunxia Ping, Guishun Li, Jinan Xia, Wenbin Fu, Guangning Hou, and Chaomin Zhang
- Subjects
010302 applied physics ,Diffraction ,Materials science ,Analytical chemistry ,Condensed Matter Physics ,Laser ,01 natural sciences ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,law.invention ,symbols.namesake ,Full width at half maximum ,Differential scanning calorimetry ,law ,0103 physical sciences ,symbols ,Thermal stability ,Germanate ,Emission spectrum ,Electrical and Electronic Engineering ,Raman spectroscopy - Abstract
Ho3+/Yb3+ co-doped tellurite–germanate glasses with lower phonon energy (771 cm−1) were prepared by conventional melt-quenching method. The prepared samples were characterized by emission spectra, differential scanning calorimeter (DSC) curve, X-ray diffraction (XRD) pattern, and Raman spectra. The DSC curve shows that the sample has a good thermal stability, in which the ΔT is 202 °C. Compared to the recently reported tellurite glasses, the ΔT was increased by approximately 24%. Under the 980 nm laser excitation, it was found that the full width at half maximum (FWHM) of the sample at 2.0 µm was 190 nm. Compared with the reported glasses for this type, the value was effectively improved. Meanwhile, the FWHM of the sample at 4.1 µm was 285 nm, which has not been reported yet. This indicates that Ho3+/Yb3+ co-doped tellurite–germanate glass has a great application prospect in mid-infrared broadband fiber amplifiers.
- Published
- 2019
8. Fabrication of hollow TiO2 nanospheres for high-capacity and long-life lithium storage
- Author
-
Tian Sang, Chaomin Zhang, Xuelong Miao, Yunxia Ping, Lijie Cao, and Mengzhao Ding
- Subjects
Materials science ,Fabrication ,General Chemical Engineering ,General Engineering ,General Physics and Astronomy ,chemistry.chemical_element ,02 engineering and technology ,Electrolyte ,Conductivity ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrochemistry ,01 natural sciences ,0104 chemical sciences ,Anode ,chemistry.chemical_compound ,chemistry ,Chemical engineering ,Titanium dioxide ,General Materials Science ,Lithium ,0210 nano-technology ,Mesoporous material - Abstract
Titanium dioxide (TiO2) is of great interest as anode material for lithium-ion batteries (LIBs) because of its safety, structure stability, and low cost. However, the limitations of low conductivity and small theoretical capacity prevent its further applications. Herein, TiO2 nanospheres with a hollow structure (H-TiO2) were successfully synthesized via a hard-template method. The resultant material used as LIBs anode with superior lithium storage properties in terms of high initial capacity (∼289 mA h g−1 at 0.1 A g−1), good rate capability (∼101 mA h g−1 at 2 A g−1), and excellent cycling stability (∼196 mA h g−1 was retained over 300 cycles at 0.1 A g−1). The improved performances are attributed to the large specific area (~225 m2 g−1) and abundant mesoporous of the hollow structure, which can not only promote the diffusion of Li+ and e− but also achieve an increase in the contact area between electrodes and electrolyte.
- Published
- 2021
9. Enhancing 1.8 μm emission from ultra-broadband Tm-Bi-Er tri-doped fluorotellurite glasses for fiber amplifiers and near-infrared lasers
- Author
-
Jinan Xia, Yunxia Ping, Guishun Li, Zhangwen Li, Guangning Hou, Chaomin Zhang, and Wenbin Fu
- Subjects
010302 applied physics ,Materials science ,Process Chemistry and Technology ,Doping ,Near-infrared spectroscopy ,Analytical chemistry ,Absorption cross section ,02 engineering and technology ,021001 nanoscience & nanotechnology ,Laser ,01 natural sciences ,Fluorescence ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,Ion ,law.invention ,Full width at half maximum ,law ,0103 physical sciences ,Materials Chemistry ,Ceramics and Composites ,0210 nano-technology ,Absorption (electromagnetic radiation) - Abstract
Fluorotellurite glasses tri-doped with Tm 3+ , Er 3+ and Bi ions were investigated. The measured parameter ΔT (116 °C) confirmed that the prepared glasses had good stability. An ultra-broadband fluorescence emission (950–1670 nm) was observed with a full-width at half-maximum (FWHM) of 560 nm, which covered the entire bands of O, E, S, C, L and U. The 1800 nm fluorescence intensity of Tm 3+ /Er 3+ co-doped and Tm 3+ /Er 3+ /Bi tri-doped glasses was enhanced compared to Tm 3+ doped glass, which indicates that there is energy transfer between Tm 3+ , Er 3+ and Bi ions. The maximum fluorescence lifetime of the prepared glasses was 7.39 ms, indicating the excellent fluorescence performance at 1800 nm. Additionally, the maximum absorption cross section (σ abs = 1.77 × 10 −20 cm −2 ) and emission cross section (σ em = 7.61 × 10 −20 cm −2 ) suggest that the Tm 3+ /Er 3+ /Bi tri-doped glasses have good optical absorption properties and high gain fluorescence emission. The above results indicate that the Tm 3+ /Er 3+ /Bi tri-doped fluorotellurite glasses have good application prospects in the field of fiber amplifiers and near-infrared lasers.
- Published
- 2019
10. Improvement of mechanical strength in Y3+/La3+ co-doped silicate glasses for display screen
- Author
-
Wenbin Fu, Chaomin Zhang, Guangning Hou, Yunxia Ping, Jinan Xia, and Guishun Li
- Subjects
010302 applied physics ,Diffraction ,Materials science ,Process Chemistry and Technology ,Analytical chemistry ,02 engineering and technology ,021001 nanoscience & nanotechnology ,01 natural sciences ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,Differential scanning calorimetry ,Windshield ,0103 physical sciences ,Materials Chemistry ,Ceramics and Composites ,Transmittance ,Thermal stability ,Fourier transform infrared spectroscopy ,0210 nano-technology ,Elastic modulus ,Architectural glass - Abstract
Y2O3 and La2O3 co-doped silicate glasses were prepared by conventional melt-quenching method. The effects of Y2O3 and La2O3 contents on the structural, thermal and mechanical properties of glass samples were investigated by X-ray diffraction (XRD), Differential scanning calorimetry (DSC) and Fourier Transform Infrared Spectroscopy (FTIR). The results showed that the prepared glass samples exhibited excellent mechanical properties and thermal stability. The hardness, elastic modulus and ΔT reaches 860HV, 108 GPa and 299 °C, respectively. Compared with the reported glasses for this type, these values were increased by approximately 19.5%, 28% and 8.7%, respectively. In addition, the transmittance of all glass samples exceeds 90% in visible spectra range. The above results indicate that the prepared glass samples can be applied to the fields of architectural glass, automotive windshield and screen of electronic products.
- Published
- 2019
11. Enhanced fluorescence emission of 2.7 μm from high thermal stability Er3+/Bi3+co-doped tellurite glasses for mid-infrared lasers
- Author
-
Yunxia Ping, Chaomin Zhang, Jinan Xia, Wenbin Fu, Guangning Hou, and Guishun Li
- Subjects
Materials science ,Laser diode ,Doping ,Analytical chemistry ,02 engineering and technology ,021001 nanoscience & nanotechnology ,Laser ,01 natural sciences ,Emission intensity ,Fluorescence ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,law.invention ,010309 optics ,law ,Excited state ,0103 physical sciences ,Thermal stability ,Electrical and Electronic Engineering ,Crystallization ,0210 nano-technology - Abstract
2.7 μm fluorescence of Er3+ single doped glass and Er3+/Bi3+ co-doped glasses are obtained when excited by a 980 nm laser diode. The fluorescence emission intensity from Er3+ is enhanced significantly by doping Bi3+ in tellurite glass. In comparison with the single doped Er3+, the emission intensity increased by 17.8%. The measured parameter ΔT(154.8℃)>130 ℃ indicates that compared with Er3+/Nd3+ co-doped tellurite glass and Tm3+ doped lead silicate glass, there is a better resistance to crystallization and thermal performance in Bi3+ doped tellurite glass. The enhanced 2.7 μm fluorescence emission of sample with the introduction of Bi3+, which may be caused by energy transfer between Bi3+ and Er3+.Above all, Strong 2.7 μm emission and good thermal properties reveal that the Bi3+/Er3+ co-doped glass may be a potential material to improve 2.7 μm laser performance of Er3+.
- Published
- 2019
12. Core-shell nanostructured SiO2@a-TiO2@Ag composite with high capacity and safety for Li-ion battery anode
- Author
-
Chaomin Zhang, Mengzhao Ding, Xuelong Miao, Yunxia Ping, and Lijie Cao
- Subjects
Battery (electricity) ,Materials science ,Mechanical Engineering ,Diffusion ,Composite number ,chemistry.chemical_element ,Conductivity ,Condensed Matter Physics ,Anode ,Ion ,chemistry ,Chemical engineering ,Mechanics of Materials ,Electrode ,General Materials Science ,Lithium - Abstract
Smarting surface coatings have been shown to be good examples to cope with the drastic volume change and poor conductivity of SiO2 anode. Herein, we successfully synthesize the SiO2@a-TiO2@Ag composite with core–shell structure via a facile sol-gel method. The designed structure, in which a-TiO2 layer show elastic behavior, can alleviate the expansion of electrode, and provide more diffusion channels for lithium-ion. In addition, Ag nanoparticles are good conductor of electricity. The resulting materials used as lithium-ion batteries anode with superior lithium storage properties in terms of high initial capacity (1320 m Ah g−1 at 0.1 A g−1), good rate capability (425 m Ah g−1 at 2 A g−1), and excellent cycling stability (712 m Ah g−1 was retained over 300 cycles at 0.1 A g−1).
- Published
- 2022
13. 303 nm continuous wave ultraviolet laser generated by intracavity frequency-doubling of diode-pumped Pr3+:LiYF4 laser
- Author
-
Chaomin Zhang, Kun Zhu, Fuxin Wang, Yi Yao, Pei Song, Yunxia Ping, Xiaohui Sun, and Pengfei Zhu
- Subjects
Materials science ,02 engineering and technology ,medicine.disease_cause ,01 natural sciences ,law.invention ,010309 optics ,Crystal ,Optics ,law ,0103 physical sciences ,medicine ,Laser power scaling ,Electrical and Electronic Engineering ,Diode ,Laser diode ,business.industry ,Far-infrared laser ,021001 nanoscience & nanotechnology ,Laser ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,Optoelectronics ,Continuous wave ,0210 nano-technology ,business ,Ultraviolet - Abstract
We demonstrate an efficient and compact ultraviolet laser at 303 nm generated by intracavity frequency doubling of a continuous wave (CW) laser diode-pumped Pr3+:YLiF4 laser at 607 nm. A cesium lithium borate (CLBO) crystal, cut for critical type I phase matching at room temperature, is used for second-harmonic generation (SHG) of the fundamental laser. By using an InGaN laser diode array emitting at 444.3 nm with a maximum incident power of 10 W, as high as 68 mW of CW output power at 303 nm is achieved. The output power stability in 4 h is better than 2.85%. To the best of our knowledge, this is high efficient UV laser generated by frequency doubling of an InGaN laser diode array pumped Pr3+:YLiF4 laser.
- Published
- 2018
14. Up-conversion and 2 µm mid-infrared emission effective enhancements in Ho3+/Yb3+ co-doped tellurite glass
- Author
-
Zhangwen Li, Yunxia Ping, Chaomin Zhang, Chao Yun, and Xuelong Miao
- Subjects
Materials science ,Doping ,Analytical chemistry ,02 engineering and technology ,021001 nanoscience & nanotechnology ,01 natural sciences ,Emission intensity ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,law.invention ,Ion ,010309 optics ,Differential scanning calorimetry ,law ,Fiber laser ,0103 physical sciences ,Thermal stability ,Electrical and Electronic Engineering ,Crystallization ,0210 nano-technology ,Luminescence - Abstract
Rare-earth ions doped fiber lasers at 2 µm can supply various applications in daily life. In this paper, Ho3+/Yb3+ co-doped tellurite glasses were prepared by the high temperature melting method to obtain a strong 2 µm mid-infrared fluorescence emission. The characterization results of the X-ray diffraction (XRD) and differential scanning calorimeter (DSC) show that this glass possesses good crystallization resistance and thermal stability, and its ΔT is 136 °C, which can be successfully drawn. Under the 980 nm LD excitation, strong green (550 nm) and red (660 nm) up-conversion emission were obtained, meanwhile, intensive 2 µm mid-infrared emission was also achieved, and the emission intensity was significantly improved with the increase of Yb3+ concentration, when the Yb3+ content was 2.0, the 2 µm mid-infrared emission intensity was increased by about 28% compared with the content of 0.5, it should be noted that the concentration of Yb3+ is required to be strictly controlled to prevent concentration quenching. In addition, the luminescence process of Ho3+ was further elaborated through the energy transfer mechanism. All results indicate that the Ho3+/Yb3+ co-doped tellurite glass can be an attractive candidate for up-conversion and mid-infrared fiber laser materials.
- Published
- 2021
15. Two-dimensional lateral photovoltaic effect in MOS structure of Ti–SiO2–Si
- Author
-
Chaomin Zhang, Xiaohui Sun, Yunxia Ping, Kun Zhu, Jin yi Du, Pengfei Zhu, and Pei Song
- Subjects
Materials science ,Acoustics and Ultrasonics ,business.industry ,Optoelectronics ,Photovoltaic effect ,Condensed Matter Physics ,business ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials - Published
- 2021
16. Effective enhancement on mid-infrared fluorescence emission of Ho3+/Yb3+ doped tellurite glass introduced Ag nanoparticles
- Author
-
Chaomin Zhang, Chao Yun, Zhangwen Li, Yunxia Ping, and Xuelong Miao
- Subjects
Materials science ,Analytical chemistry ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,law.invention ,Inorganic Chemistry ,symbols.namesake ,law ,Differential thermal analysis ,Thermal stability ,Electrical and Electronic Engineering ,Physical and Theoretical Chemistry ,Surface plasmon resonance ,Spectroscopy ,Organic Chemistry ,Doping ,021001 nanoscience & nanotechnology ,Laser ,Fluorescence ,Atomic and Molecular Physics, and Optics ,0104 chemical sciences ,Electronic, Optical and Magnetic Materials ,Full width at half maximum ,symbols ,0210 nano-technology ,Raman spectroscopy - Abstract
In this paper, Ho3+, Yb3+ and metal Ag nanoparticles (NPs) tri-doped tellurite glass were synthesized by melt quenching. Combining X-ray diffraction, Raman spectroscopy, and Differential thermal analysis tests, multiple structural units were found in the synthetic glass samples which provided the possibility to achieve high concentration and uniform doping of rare earth ions without degrading the glass forming ability and thermal stability. The fluorescence emission of glasses at 2 μm, 3.9 μm, and 4.1 μm were focused on, as a consequence, the Ho3+/Yb3+/AgNPs tri-doped tellurite glass achieved strong emission at 2 μm, 3.9 μm and 4.1 μm, and the full width at half maximum (FWHM) at 4.1 μm is 316 nm under the 980 nm LD excitation, which realized broadband fluorescence emission. In addition, the fluorescence lifetimes of the glass at 2 μm, 3.9 μm and 4.1 μm are 4.79 ms, 3.81 ms and 4.28 ms meaning the lower laser oscillation threshold the glass holds. It is particularly noteworthy that the emission intensity had been greatly improved about 30% at 2 μm and 27% at 3.9 μm and 4.1 μm with the introduction of AgCl into the matrix, respectively, which was mainly effected by local surface plasmon resonance (LSPR) of AgNPs and the energy transfer between Ag species and Ho3+, whereas the content of AgCl must be strictly controlled to prevent the concentration quenching to decrease the emission intensity. The obtained results demonstrate that Ho3+/Yb3+/AgNPs tri-doped tellurite glass possesses an ideal application prospect on mid-infrared fiber and laser materials.
- Published
- 2021
17. Ti mediated highly oriented growth of uniform and smooth Ni(Si0.8Ge0.2) layer for advanced contact metallization
- Author
-
Xing Wei, Zhongying Xue, Chunlei Hou, Zengfeng Di, Wenjie Yu, Wei Peng, Chaomin Zhang, Yunxia Ping, Bo Zhang, and Miao Zhang
- Subjects
010302 applied physics ,Materials science ,Annealing (metallurgy) ,Mechanical Engineering ,Metallurgy ,Metals and Alloys ,02 engineering and technology ,021001 nanoscience & nanotechnology ,01 natural sciences ,Reference sample ,Mechanics of Materials ,0103 physical sciences ,Materials Chemistry ,Composite material ,0210 nano-technology - Abstract
Uniform and highly oriented NiSi0.8Ge0.2 layer is achieved by using a Ti interlayer during Ni germanosilicidation. Compared with the reference sample, the morphology of the grown Ni(Si0.8Ge0.2) layer with a Ti interlayer is improved with a better uniformity and smoother surface and interface. The Ni(Si0.8Ge0.2) layer is highly oriented grown on Si0.8Ge0.2 substrate at 500 °C annealing in the case of 5 nm Ti interlayer, with the preferred orientation relationships of (010) Ni(Si0.8Ge0.2) || (001) Si0.8Ge0.2 and (101) Ni(Si0.8Ge0.2) || (110) Si0.8Ge0.2. In addition, most of Ti atoms from the original interlayer diffuses toward the surface after annealing. The reduced Ni diffusion is conducive for the uniform reaction between Ni and Si0.8Ge0.2, resulting in highly oriented Ni(Si0.8Ge0.2) grown on Si0.8Ge0.2.
- Published
- 2017
18. Improvement of ultra-broadband near-infrared emission at around 1.0 µm in Nd3+-Er3+-Pr3+ tri-doped tellurite glasses
- Author
-
Chaomin Zhang, Guishun Li, Yunxia Ping, Wenbin Fu, Xiaoran Yu, Guangning Hou, and Jinan Xia
- Subjects
010302 applied physics ,Materials science ,Doping ,Absorption cross section ,Analytical chemistry ,Gain ,02 engineering and technology ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Fluorescence ,Electronic, Optical and Magnetic Materials ,Full width at half maximum ,0103 physical sciences ,Materials Chemistry ,Ceramics and Composites ,Thermal stability ,0210 nano-technology ,Glass transition ,Absorption (electromagnetic radiation) - Abstract
Nd3+-Er3+-Pr3+ tri-doped tellurite glasses with lower phonon energy (768 cm−1) were prepared by conventional melt-quenching method. Under the excitation of 488nm, an ultra-broadband emission from 760 to 1150 nm with full-width at half-maximum (FWHM) of about 262 nm was observed in the prepared Nd3+-Er3+-Pr3+ tri-doped glass sample, larger than that of the recently reported glasses. The DSC curve shows that the prepared tellurite glass has high glass transition temperature (Tg=382°C) and good thermal stability (ΔT=203°C). The gain coefficient, maximum absorption and emission cross section of Nd3+-Er3+-Pr3+ tri-doped tellurite glass for Nd3+:4F3/2→4I9/2 and Er3+:4I11/2→4I15/2 transitions are calculated as 0.41 cm−1, 0.80 × 10−20 cm2, 1.07 × 10−20 cm2, 0.35 cm−1, 0.37 × 10−20 cm2 and 0.45 × 10−20 cm2, respectively. Compared with the recently reported glasses, these values were effectively improved. This means that the prepared tellurite glass has better fluorescence emission and laser gain performance.
- Published
- 2021
19. Improvement of ultra-broadband near-infrared emission in Nd3+-Er3+-Pr3+ tri-doped tellurite glasses
- Author
-
Xiaoran Yu, Jinan Xia, Lijie Cao, Guangning Hou, Chaomin Zhang, Wenbin Fu, Guishun Li, and Yunxia Ping
- Subjects
Materials science ,Analytical chemistry ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,law.invention ,Inorganic Chemistry ,symbols.namesake ,law ,Electrical and Electronic Engineering ,Physical and Theoretical Chemistry ,Crystallization ,Spectroscopy ,Organic Chemistry ,Doping ,Absorption cross section ,Gain ,021001 nanoscience & nanotechnology ,Atomic and Molecular Physics, and Optics ,0104 chemical sciences ,Electronic, Optical and Magnetic Materials ,Amorphous solid ,Full width at half maximum ,symbols ,0210 nano-technology ,Glass transition ,Raman spectroscopy - Abstract
Nd3+-Er3+-Pr3+ tri-doped tellurite glasses with lower phonon energy (766 cm−1) were prepared by conventional melt-quenching method. Under the excitation of 488 nm, an ultra-broadband emission from 1250 to 1650 nm with full-width at half-maximum (FWHM) of about 332 nm was found in Nd3+-Er3+-Pr3+ tri-doped tellurite glass, larger than that of recently reported tellurite glasses. The DSC curve showed that the prepared glass had a high glass transition temperature (Tg = 381 °C) and good crystallization resistance (ΔT = 195 °C). Raman spectra and XRD pattern revealed the information of different vibrational units and the amorphous structure of the prepared glass. The maximum absorption cross-section, emission cross-section and gain coefficient of the prepared tellurite glass were calculated as 1.05 × 10−20 cm2, 1.34 × 10−20 cm2 and 1.55 cm−1, respectively. Compared with the recently reported glasses, these values were improved. This indicates that better laser gain and fluorescence emission could be obtained in the prepared tellurite glass. The results showed that Nd3+-Er3+-Pr3+ tri-doped tellurite glass is a promising near-infrared optical material.
- Published
- 2021
20. Improving 2.0 μm fluorescence properties of Er3+/Ho3+ co-doped oxyfluoride silicate glass-ceramics containing YF3 nanocrystals by introducing Li+ ions for mid-infrared lasers
- Author
-
Yunxia Ping, Jinan Xia, Xiaoran Yu, Chaomin Zhang, Zhangwen Li, and Wenbin Fu
- Subjects
Materials science ,Biophysics ,Analytical chemistry ,Absorption cross section ,02 engineering and technology ,General Chemistry ,Substrate (electronics) ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Biochemistry ,Fluorescence ,Atomic and Molecular Physics, and Optics ,Silicate ,0104 chemical sciences ,Ion ,law.invention ,Crystal ,chemistry.chemical_compound ,chemistry ,Nanocrystal ,law ,Crystallization ,0210 nano-technology - Abstract
The enhancement of mid-infrared (MIR) fluorescence emission (1800–3000 nm) was achieved by adding Li+ ions into Er3+/Ho3+ co-doped oxyfluoride silicate glass-ceramics containing YF3 nanocrystals, which was prepared by conventional melt-quenching. The introduction of Li+ ion destroys the glass network [Si–O–Al] structure, and affects the crystallization ability of the substrate glass. In addition, the crystal field effect significantly enhances the up-conversion and MIR fluorescence emission of the prepared samples, with a decay time of 4.6 ms and the maximal absorption cross section (σabs) of 1.43 × 10−20 cm−2 at 1950 nm, as well as emission cross section (σem) of 1.73 × 10−20 cm−2 at 2021 nm. The results indicate that the prepared samples have excellent fluorescence properties and can be used for MIR lasers.
- Published
- 2020
21. Schottky barrier dependent antimicrobial efficacy of silver nanoparticles
- Author
-
Manle Wang, Xiaoying Lü, Xiaobing Zhao, Xuanyong Liu, Yunxia Ping, Huiliang Cao, and Fanhao Meng
- Subjects
Materials science ,Schottky barrier ,Nanotechnology ,02 engineering and technology ,engineering.material ,010402 general chemistry ,01 natural sciences ,Silver nanoparticle ,Electron transfer ,Coating ,General Materials Science ,Thin film ,business.industry ,Mechanical Engineering ,technology, industry, and agriculture ,Substrate (chemistry) ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Plasma-immersion ion implantation ,0104 chemical sciences ,Semiconductor ,Chemical engineering ,Mechanics of Materials ,engineering ,0210 nano-technology ,business - Abstract
The antimicrobial efficacy of silver nanoparticles (Ag NPs) modified material was generally governed by the dose of the particles or their capability to release silver ions. Here, it was found that Ag NPs acted against microbes by cooperating with tantalum oxide (TAO) in a Schottky barrier dependent manner. Size tunable Ag NPs were in situ fabricated and immobilized on TAO coating by a silver plasma immersion ion implantation process (Ag PIII). The antibacterial efficacy of these Ag NPs was reversely dependent on their size, that is large particles (~20 nm) were more efficiency than small ones (~10 nm) in defeating the invasion by bacteria. The result is consistent with the prediction of Schottky-Mott theory, which rectified the electron transfer nature across the interfaces between Ag NPs and the TAO substrate.
- Published
- 2016
22. Photothermoelectric resistance effect observed in Ti/SiO2/Si structure induced by 10.6 μm CO2 laser
- Author
-
Kun Zhu, Pengfei Zhu, Xiaohui Sun, Pei Song, Yunxia Ping, Xu Sun, and Chaomin Zhang
- Subjects
010302 applied physics ,Materials science ,Co2 laser ,business.industry ,Statistical and Nonlinear Physics ,02 engineering and technology ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Co 2 laser ,0103 physical sciences ,Optoelectronics ,Transient response ,0210 nano-technology ,business - Abstract
A novel photothermoelectric resistance effect of the Ti/SiO2/Si films induced by 10.6 [Formula: see text]m CO2 laser is discovered and investigated. The transient response of the resistance is observed and analyzed in this work. Under the continuous irradiation of the laser, the thermal resistance value changes with the irradiating time and gradually reaches a stable saturation. The results indicate that the rise time of thermal resistance is shortened and its change rate increased as laser power gets higher. The inner battery of the ohmmeter exerts the positive or negative bias voltage, causing the diffusion motion direction of the hot electrons to be opposite or the same direction with the drift motion, which can increase or decrease the thermal resistance value. Those experimental phenomena are explained by the drift and diffusion motion of the electrons. Based on the results, the Ti/SiO2/Si structure is an attractive candidate for thermal effect devices.
- Published
- 2020
23. Transmission and reflection characteristics of normal incidence on silicon-metal-silicon interface
- Author
-
Kun Zhu, Chaomin Zhang, Xu Sun, Yunxia Ping, Xiaohui Sun, Pengfei Zhu, and Pei Song
- Subjects
Materials science ,Silicon ,Broadband pulse ,business.industry ,Interface (computing) ,chemistry.chemical_element ,Statistical and Nonlinear Physics ,02 engineering and technology ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Transmission (telecommunications) ,chemistry ,0103 physical sciences ,Reflection (physics) ,Optoelectronics ,010306 general physics ,0210 nano-technology ,business - Abstract
We investigate transmission and reflection properties of a broadband pulse with normal incidence on silicon-metal-silicon (SMS) for the first time, to the best of our knowledge. The results show that in lower frequency range, the transmission is close to zero, and the reflection and loss are in the range 0.50–0.90, 0.10 to 0.50, respectively. In higher frequency range, the transmission spectrum has two peaks, with transmittance 0.69, 0.90, and at same frequencies as the transmission peaks, the reflection spectrum has two troughs with reflectance 0.00, 0.02 and corresponding losses are 0.10, 0.29, respectively. This simple waveguide structure may have potential applications in silicon photonics, such as filters and laser oscillation cavities.
- Published
- 2020
24. Broadband mid-infrared 2.0 μm and 4.1 μm emission in Ho3+/Yb3+ co-doped tellurite-germanate glasses
- Author
-
Yunxia Ping, Guangning Hou, Jinan Xia, Wenbin Fu, Guishun Li, and Chaomin Zhang
- Subjects
Materials science ,Photoluminescence ,Doping ,Biophysics ,Analytical chemistry ,02 engineering and technology ,General Chemistry ,Laser pumping ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Laser ,01 natural sciences ,Biochemistry ,Emission intensity ,Atomic and Molecular Physics, and Optics ,0104 chemical sciences ,law.invention ,Full width at half maximum ,law ,Thermal stability ,Germanate ,0210 nano-technology - Abstract
Ho3+/Yb3+ co-doped tellurite-germanate glasses with lower phonon energy (779 cm−1) and higher thermal stability were prepared by conventional melt quenching. The mid-infrared fluorescence spectra of the prepared glasses were investigated by 980 nm laser pumping. The full width at half maximum (FWHM) and lifetime of the sample at 2.0 μm were 186 nm and 8.09 ms, respectively. Compared with the reported glasses for this type, these values were effectively improved. In particular, the FWHM and emission lifetime of the prepared glass at 4.1 μm reached 276 nm and 8.17 ms, respectively, which have not been reported yet. Meanwhile, compared to the recently reported tellurite glasses, the ΔT was increased by approximate 22.7%. Strong up-conversion visible emission peaks at 547, 662, and 756 nm and near-infrared emission at 1.20 μm were observed in Ho3+/Yb3+ co-doped glass. Meanwhile, photoluminescence measurements showed that the doping of the appropriate amount of Yb3+ ions significantly enhanced the emission intensity of the samples at 2.0 μm and 4.1 μm. Therefore, the Ho3+/Yb3+ co-doped tellurite-germanate glass is a promising candidate for mid-infrared fiber and laser materials applications.
- Published
- 2020
25. Formation of uniform and homogeneous ternary NiSi2−x Al x on Si(001) by an Al interlayer mediation
- Author
-
Jun Yang, Wenjie Yu, Aimin Wu, Kai Yong, Bo Zhang, Xing Wei, Yunxia Ping, Zhongying Xue, and Wei Liu
- Subjects
Crystallography ,Materials science ,Homogeneous ,Mediation ,General Engineering ,General Physics and Astronomy ,Ternary operation - Published
- 2019
26. Effect of platinum interlayer on the thermal stability improvement of nickel stanogermanide
- Author
-
Zhongying Xue, Wenjie Yu, Zengfeng Di, Miao Zhang, Wei Ren, Meng Xiaoran, Xing Wei, Bo Zhang, Wei-Jun Wan, and Yunxia Ping
- Subjects
010302 applied physics ,Materials science ,Scanning electron microscope ,Annealing (metallurgy) ,Analytical chemistry ,chemistry.chemical_element ,02 engineering and technology ,021001 nanoscience & nanotechnology ,01 natural sciences ,Nickel ,chemistry ,Transmission electron microscopy ,0103 physical sciences ,Thermal stability ,0210 nano-technology ,Spectroscopy ,Platinum ,Sheet resistance - Abstract
We demonstrate an effective way to improve the thermal stability of nickel stanogermanide (NiGeSn) by incorporating platinum (Pt) interlayer. After Ni/Pt/GeSn samples reacted at different temperatures (300°C–500°C), we obtained uniform NiGeSn films. By means of sheet resistance measurement, scanning electron microscopy, cross-sectional transmission electron microscopy and energy dispersive X-ray spectroscopy characterization. These results show that in the existence of Pt, the applicable annealing temperature of NiGeSn is broadened and the morphology of the NiGeSn film is smoother and more uniform.
- Published
- 2018
27. Impact of an ultra-thin Ti interlayer on the formation of NiSiGe/SiGe
- Author
-
Bo Zhang, Qing-Tai Zhao, Xing Wei, Xi Wang, Miao Zhang, Zhongying Xue, Zengfeng Di, Yunxia Ping, Chunlei Hou, and Wenjie Yu
- Subjects
Materials science ,Chemical engineering ,Annealing (metallurgy) ,Metallurgy ,Thermal stability ,Electrical and Electronic Engineering ,Condensed Matter Physics ,Beneficial effects ,Atomic and Molecular Physics, and Optics ,Sheet resistance ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,A titanium - Abstract
Graphical abstractDisplay Omitted The interfacial reactions of Ni/Ti bilayers on relaxed Si0.7Ge0.3 substrates were investigated.The incorporation of Ti exhibited significant beneficial effects on improving the thermal stability of NiSiGe layers.The incorporation of Ti greatly improves the surface and interface roughnesses of NiSiGe layers.The mechanism of Ti induced NiSiGe/SiGe contacts enhancement is also analyzed. We investigate the effects of a Titanium (Ti) interlayer on the formation of nickel-germanosilicide on relaxed Si0.7Ge0.3 layers. The layer morphology and sheet resistance are investigated at different annealing temperature. The presence of Ti atoms increases the thermal stability of NiSiGe about 100?C. We demonstrate that the Ti atoms retard the Ni germanosilicidation rate, stabilize the NiSiGe phase, and smooth the NiSiGe/SiGe interface.
- Published
- 2015
28. Effect of Sn implantation on thermal stability improvement of NiSiGe
- Author
-
Miao Zhang, Wenjie Yu, Xing Wei, Xi Wang, Zhongying Xue, X. Meng, Bo Zhang, Zengfeng Di, and Yunxia Ping
- Subjects
Nuclear and High Energy Physics ,Materials science ,Scanning electron microscope ,Transmission electron microscopy ,Annealing (metallurgy) ,Analytical chemistry ,Thermal stability ,Rutherford backscattering spectrometry ,Instrumentation ,Sheet resistance ,Ion - Abstract
We study the formation of nickel-germanosilicide (NiSiGe) on Sn ion pre-implanted Si0.8Ge0.2 layers. The Sn influences on NiSiGe morphology and sheet resistance are investigated at different annealing temperature. The NiSiGe films were characterized by scanning electron microscopy (SEM), Rutherford backscattering spectrometry (RBS), cross-section transmission electron microscopy (XTEM), and Energy Dispersive X-ray spectrometer (EDX) techniques. It is shown that the presence of Sn atoms increases the thermal stability of NiSiGe about 150 °C. We demonstrate that the Sn atoms retard the Ni germanosilicidation rate, stabilize the NiSiGe phase, and smooth the NiSiGe/SiGe interface.
- Published
- 2015
29. All-solid-state side-pumped intracavity sum frequency generation yellow laser at 589 nm with the output power of 11.4 W
- Author
-
L. L. Wang, Y. Yao, Chaomin Zhang, Yunxia Ping, P. F. Zhu, L. J. Zhao, and Pei Song
- Subjects
Materials science ,Sum-frequency generation ,Laser diode ,business.industry ,Energy conversion efficiency ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,law.invention ,Pulsed laser deposition ,Optics ,law ,Optoelectronics ,Continuous wave ,Laser power scaling ,business ,Fabry–Pérot interferometer ,Pulse-width modulation - Abstract
A laser diode side pump all-solid-state pulse laser at 589 nm with high power and high conversion efficiency and small volume is demonstrated by intracavity sum frequency generation. By optimizing the cavity and adopting etalon techniques, a quasi continuous wave at 589 nm laser source, which has a maximum output power of 11.4 W, a repetition rate of 5 kHz, and a pulse width of 135 ns, is developed. The optical to optical conversion efficiency is up to 6.5% and the power stability is better than 2% in 8 hours.
- Published
- 2014
30. Dynamic control of Q factor in photonic crystal microcavity employing Kerr effect
- Author
-
Yunxia Ping, Fuxin Wang, Chun Jiang, Bo Fang, Chaomin Zhang, and Pengfei Zhu
- Subjects
Physics ,Kerr effect ,Computer simulation ,business.industry ,Dynamic control ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,Crystal ,Quality (physics) ,Optics ,Q factor ,Electrical and Electronic Engineering ,Physical and Theoretical Chemistry ,business ,Photonic crystal - Abstract
We design an in-plan hetero-photonic crystal (IP-HPC) structure which can dynamically control the quality (Q) factor of the nanocavity by using Kerr effect. In both theoretical derivation and numerical simulation, the Q factor could be dynamically turned with a larger scale than reported before. We study the effect of distance between the cavity and the hetero-photonic crystal on the Q factor. With optimal parameters, the Q factor of the nanocavity can be changed from ∼130,000 to ∼880,000 in the IP-HPC system.
- Published
- 2012
31. Output nonlocality and nonclassicality in a two-mode entanglement laser
- Author
-
Jianbao Wu, Yunxia Ping, and Chaomin Zhang
- Subjects
Condensed Matter::Quantum Gases ,Physics ,Quantum optics ,Quantum Physics ,Quantum entanglement ,Laser ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,law.invention ,Quantum nonlocality ,Nonlinear Sciences::Exactly Solvable and Integrable Systems ,Bell's theorem ,law ,Quantum mechanics ,Light beam ,Electrical and Electronic Engineering ,Quantum information ,Nonlinear Sciences::Pattern Formation and Solitons ,Mixing (physics) - Abstract
Output nonlocality and nonclassicality for the two modes are investigated in an entanglement laser system. Within the framework of a quantum theory of multiwave mixing, nonlocality and nonclassicality are discussed according to the violations of Bell inequality and Cauchy-Schwarz inequality. It is found that both nonlocality and nonclassicality can be fulfilled in the outside cavity fields under certain conditions. It is also shown that there are some nonclassical states that do not show nonlocality.
- Published
- 2011
32. TWO-MODE ENTANGLEMENT AND SQUEEZING IN A THREE-LEVEL CASCADE ATOMIC SYSTEM
- Author
-
Yunxia Ping
- Subjects
Physics ,Photon ,Field (physics) ,Atomic system ,Mode (statistics) ,Physics::Optics ,Statistical and Nonlinear Physics ,Quantum Physics ,Quantum entanglement ,Condensed Matter Physics ,Three level ,Atomic coherence ,Cascade ,Atomic physics - Abstract
The generation and evolution of entanglement and squeezing for the two-mode fields are discussed in a cascade three-level atomic system. Two photons of a strong external pump field induce atomic coherence between the top and bottom levels. The dynamics of this system in the presence of cavity losses is studied. It is shown that entanglement and squeezing between the two modes increase initially, then decrease and eventually disappear. The periods of them are extended with the increasing of the pump field intensity. The effects of the cavity losses on squeezing and entanglement are also discussed.
- Published
- 2010
33. Improvement of Nickel-Stanogermanide Contact Properties by Platinum Interlayer
- Author
-
Xing Wei, Zengfeng Di, Wenjie Yu, Wei-Jun Wan, Yunxia Ping, Meng Xiaoran, Miao Zhang, Wei Ren, Bo Zhang, and Zhongying Xue
- Subjects
010302 applied physics ,X-ray spectroscopy ,Materials science ,Scanning electron microscope ,Analytical chemistry ,General Physics and Astronomy ,chemistry.chemical_element ,02 engineering and technology ,021001 nanoscience & nanotechnology ,01 natural sciences ,law.invention ,Nickel ,chemistry ,Transmission electron microscopy ,law ,0103 physical sciences ,Microscopy ,Electron microscope ,0210 nano-technology ,Spectroscopy ,Platinum - Published
- 2018
34. Statistical properties of thermal radiation in a Kerr nonlinear blackbody
- Author
-
Zixia Wu, Miao Yin, Yunxia Ping, and Ze Cheng
- Subjects
Physics ,Photon ,business.industry ,Physics::Optics ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,Sakuma–Hattori equation ,Correlation function (statistical mechanics) ,Optics ,Distribution function ,Thermal radiation ,Phase space ,Quasiparticle ,Black-body radiation ,Electrical and Electronic Engineering ,Physical and Theoretical Chemistry ,business - Abstract
We study the statistical properties of thermal radiation in a Kerr nonlinear blackbody in which bare photons with opposite wave vectors and helities are bound into pairs and unpaired photons are transformed into a different kind of quasiparticle, the nonpolariton. This paper investigates the statistical properties of the photon blackbody field by using the second-order correlation function, the phase space distribution function, the photon number distribution and the nonclassical depth. The numerical computation and a discussion of the results are present.
- Published
- 2008
35. Periodic entanglement of magnons in an antiferromagnet
- Author
-
Bo Zhang, Yunxia Ping, Zixia Wu, and Ze Cheng
- Subjects
Physics ,Condensed matter physics ,Magnon ,Quantum mechanics ,Materials Chemistry ,Antiferromagnetism ,Condensed Matter::Strongly Correlated Electrons ,Quantum Physics ,General Chemistry ,Quantum entanglement ,Condensed Matter Physics - Abstract
The dynamics of entanglement for two-mode magnons in an antiferromagnet is investigated according to the entanglement criterion proposed by Duan et al. [L.M. Duan, G. Giedke, J.I. Cirac, P. Zoller, Phys. Rev. Lett. 84 (2000) 2722]. It is shown that entanglement between the two modes of magnons can be generated and occurs periodically with time.
- Published
- 2007
36. Entanglement in the steady state of a two-mode three-level atomic system
- Author
-
Yanmin Zhang, Ze Cheng, Bo Zhang, and Yunxia Ping
- Subjects
Physics ,Steady state (electronics) ,Mathematical model ,Bell's theorem ,Quantum mechanics ,Mode (statistics) ,General Physics and Astronomy ,Quantum Physics ,Quantum entanglement ,State (functional analysis) ,Atomic physics ,Quantum information ,W state - Abstract
We investigate entanglement of a two-mode three-level atomic system in a doubly resonant cavity in the steady state. We show that the system reaches a entangled state even in the presence of cavity losses. Moreover, violation of Bell's inequality of the entangled state is also discussed.
- Published
- 2007
37. Two-mode squeezed magnetopolarons in two-dimensional quantum dot
- Author
-
Yunxia Ping, Zixia Wu, Yanmin Zhang, and Ze Cheng
- Subjects
Physics ,Range (particle radiation) ,Phonon ,Cyclotron ,General Physics and Astronomy ,Bilinear interpolation ,Condensed Matter::Mesoscopic Systems and Quantum Hall Effect ,law.invention ,Transformation (function) ,Quantum dot ,law ,Excited state ,Quantum electrodynamics ,Quantum mechanics ,Ground state - Abstract
In this Letter, some properties of magnetopolarons in two-dimensional quantum dot are investigated by two-mode squeezed states transformation. This method considers linear functions, bilinear functions of the phonon operators and the correlation between two longitudinal optical (LO) phonon modes, which is based on the Lee–Low–Pines and Huybrechts (LLP–H) canonical transformations. So it can provide results not only for the ground state energy but also for the excited states energies, furthermore, it can be applied to the entire range of the electron–phonon coupling strength. Using two-mode squeezed states transformation, we have obtained more accurate results for the ground state energy, excited states energies and renormalized cyclotron masses for some possible transitions.
- Published
- 2007
38. Magnon squeezing states in a ferromagnet
- Author
-
Junfeng Wang, Yunxia Ping, Jinyin Wan, Yanmin Zhang, and Ze Cheng
- Subjects
Physics ,Condensed matter physics ,Condensed Matter::Other ,Magnon ,Quantum noise ,General Physics and Astronomy ,Condensed Matter::Materials Science ,Nonlinear system ,symbols.namesake ,Mean field theory ,Ferromagnetism ,Spin wave ,Quantum mechanics ,symbols ,Condensed Matter::Strongly Correlated Electrons ,Hamiltonian (quantum mechanics) ,Quantum fluctuation - Abstract
In this Letter we discuss squeezing state of magnon in ferromagnet, which permits a reduction in the quantum fluctuation of the spin component to below the zero-point quantum noise level of coherent magnon states. We investigate the generation of squeezed magnon state through calculating the expectation values of spin component fluctuation. The mean field theory is introduced in dealing with the nonlinear interaction terms of Hamiltonian of magnon system.
- Published
- 2006
39. Effect of Ti interlayer on the formation of epitaxial NiSiGe on strained Si0.8Ge0.2
- Author
-
Wenjie Yu, Yunxia Ping, Xing Wei, Chunlei Hou, H. Gao, Zhongying Xue, Bo Zhang, Miao Zhang, W. Peng, and Zengfeng Di
- Subjects
Barrier layer ,Nickel ,Materials science ,chemistry ,Transition temperature ,Phase (matter) ,Metallurgy ,chemistry.chemical_element ,Substrate (electronics) ,Composite material ,Epitaxy ,Layer (electronics) ,Titanium - Abstract
The effect of an ultrathin titanium (Ti) interlayer on the formation of nickel germanosilicide on strained Si 0.8 Ge 0.2 /Si(100) was studied. A uniform flattened Ni(Si 0.8 Ge 0.2 ) layer is finally formed after rapid thermal annealing. The transition temperature from the Ni-rich germanosilicide phase to the monogermanosilicide phase increases for the incorporation of Ti. The Ti interlayer acting as an inter-diffusion barrier layer well balance the silicidation velocity, which contributes to the achievement of the highly-oriented nickel germanosilicidation. The strain of Si 0.8 Ge 0.2 remains nearly the same after the RTA procedure. Considering the smooth interface between the NiSiGe layer and the SiGe substrate, the approach presented indicates a potential application for S/D contacts in the future CMOS devices.
- Published
- 2014
40. Enhancing the lateral photovoltaic effect by coating the absorbing film on metal-oxide-semiconductor structure
- Author
-
Qi Lin, Fuxin Wang, Yunxia Ping, Chaomin Zhang, Jianbao Wu, Bai Liang, and Pengfei Zhu
- Subjects
Amorphous silicon ,Materials science ,business.industry ,Graphene ,Materials Science (miscellaneous) ,Photovoltaic effect ,engineering.material ,Molar absorptivity ,Industrial and Manufacturing Engineering ,law.invention ,chemistry.chemical_compound ,Optics ,Carbon film ,Coating ,chemistry ,law ,engineering ,Optoelectronics ,Business and International Management ,Thin film ,business ,Saturation (magnetic) - Abstract
By coating with a carbon film and graphene sheet (GS) on position-sensitive detectors based on the metal–oxide–semiconductor structure, sensitivity, linearity, and saturation power are significantly improved. We attribute this enhancement of absorptivity to lasers. The improvement effect of carbon film is more obvious than that of GS coating because of GS’s high conductivity.
- Published
- 2011
41. OUTPUT ENTANGLEMENT IN A FOUR-LEVEL CORRELATED EMISSION LASER
- Author
-
Chaomin Zhang, Shan Wang, Yunxia Ping, and Mingxia Wang
- Subjects
Physics ,Photon entanglement ,Physics and Astronomy (miscellaneous) ,law ,Quantum mechanics ,Quantum Physics ,Quantum entanglement ,Laser ,Squashed entanglement ,Atomic coherence ,law.invention - Abstract
The continuous-variable (CV) entanglement of the output fields is investigated in a four-level correlated emission laser system. The atomic coherence is introduced using two external classical driving fields. Based on the input–output theory, it is shown that the output entanglement and the entangled photons of the system can be achievable under certain conditions. Moreover, it is found that the two-mode entanglement has a close relation with the intensities of two external driving fields.
- Published
- 2013
42. Output nonlocality and nonclassicality in a two-mode entanglement laser
- Author
-
Yunxia Ping, 平云霞, primary, Chaomin Zhang, 张朝民, additional, and Jianbao Wu, 吴建宝, additional
- Published
- 2011
- Full Text
- View/download PDF
43. Enhancing the lateral photovoltaic effect by coating the absorbing film on metal—oxide—semiconductor structure.
- Author
-
Chaomin Zhang, Pengfei Zhu, Fuxin Wang, Yunxia Ping, Jianbao Wu, Qi Lin, and Bai Liang
- Published
- 2011
- Full Text
- View/download PDF
44. Formation of uniform and homogeneous ternary NiSi2−x Al x on Si(001) by an Al interlayer mediation.
- Author
-
Kai Yong, Yunxia Ping, Wei Liu, Jun Yang, Wenjie Yu, Zhongying Xue, Xing Wei, Aimin Wu, and Bo Zhang
- Abstract
Ternary NiSi
2−x Alx layer with uniform and smooth NiSi2−x Alx /Si interface has been achieved by Al interlayer mediated epitaxy. A 3 nm Al interlayer is introduced to the Nickel silicidation on Si(001) substrate. The morphology, composition, and micro-structure of the Ni silicide layers are analyzed for different annealing temperatures. It is found that under the assistance of Al atoms, the best quality Ni silicide layer is achieved by annealing at 700 °C. The reduced Ni diffusion and the modified energetics are conducive for the uniform reaction between Ni and Si, resulting in epitaxial ternary NiSi2−x Alx layer on Si(001) substrate. [ABSTRACT FROM AUTHOR]- Published
- 2020
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.