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Your search keyword '"Zheng, Yu-Xiang"' showing total 290 results
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290 results on '"Zheng, Yu-Xiang"'

5. Optical Properties of Solar Absorber Materials and Structures

Author

Hu, Er-Tao, Zang, Kai-Yan, Zhang, Jing-Ru, Jiang, An-Qing, Zhao, Hai-Bin, Zheng, Yu-Xiang, Wang, Song-You, Wei, Wei, Yoshie, Osamu, Lee, Young-Pak, Guo, Jun-Peng, Lynch, David W., Chen, Liang-Yao, Lee, Young Pak, Series Editor, Lockwood, David J., Series Editor, Ossi, Paolo M., Series Editor, Yamanouchi, Kaoru, Series Editor, and Chen, Liang-Yao, editor

Published
2021
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9. Measurement of Fe emission spectrum from 170 nm to 600 nm with a coma-free spectrometer

Author

Li, Chu, primary, Xia, Guo-Qiang, additional, Jiang, An-Qing, additional, Ren, Jiu-Chun, additional, Hu, Er-Tao, additional, Chen, Jian-Ke, additional, Zhang, Qiao-Chu, additional, Yu, Lei, additional, Yoshie, Osamu, additional, Xiang, X.-D., additional, Zhao, Hai-Bin, additional, Zheng, Yu-Xiang, additional, Wang, Song-You, additional, Yang, Yue-Mei, additional, Wei, Wei, additional, Lee, Young-Pak, additional, Guo, Junpeng, additional, Jia, Yun-Hai, additional, and Chen, Liang-Yao, additional

Published
2024
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21. Interpretation of Reflection and Colorimetry Characteristics of Indium-Particle Films by Means of Ellipsometric Modeling

Author

Zhang, Hao-Tian, primary, He, Rong, additional, Peng, Lei, additional, Yang, Yu-Ting, additional, Sun, Xiao-Jie, additional, Zhang, Yu-Shan, additional, Zheng, Yu-Xiang, additional, Liu, Bao-Jian, additional, Zhang, Rong-Jun, additional, Wang, Song-You, additional, Li, Jing, additional, Lee, Young-Pak, additional, and Chen, Liang-Yao, additional

Published
2023
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35. Spatial effect on the interference of light propagated in a film structure

Author

Sheng, Ming-Yu, Wu, Yun-Hua, Feng, Shou-Zhi, Chen, Yue-Rui, Zheng, Yu-Xiang, and Chen, Liang-Yao

Subjects
Light -- Properties, Interference (Light) -- Observations, Wave propagation -- Observations, Astronomy, Physics
Abstract

The interference of light has been analyzed for a film structure by considering that a spatial separation exists for the two neighboring light beams to be interfered in the space. There is a significant difference between the situations of the interference with or without consideration of the spatial effect, especially around the region where the phase delay [delta] : [pi] and 2[pi] by taking the example of the one-layered Si[O.sub.2]/Si structure. It is reasonable to extract the optical parameters by neglecting the spatial effect only for the thinner film with a thickness much smaller than a wavelength, which satisfies the condition that [delta] < [pi]; otherwise, the film equation used for the periodic or nonperiodic structures will be modified by including the spatial effect in the data analysis and applications. OCIS codes: 260.3160, 310.6860.

Published
2007

39. Optimal design and preparation of high-performance multilayered thin film daytime radiative coolers.

Author

Zhang, Yu-Shan, Liu, Bao-Jian, Sun, Xiao-Jie, Duan, Wei-Bo, Yang, Yu-Ting, Yu, De-Ming, Cai, Qing-Yuan, Zhang, Hao-Tian, Peng, Lei, Zhang, Rong-Jun, and Zheng, Yu-Xiang

Subjects
MULTILAYERED thin films, THIN films, ABSORPTION spectra, SUBSTRATES (Materials science), SOLAR cells
Abstract

Radiative cooling is a passive cooling strategy that can radiate heat to outer space through the 8 to 13 μm waveband (atmospheric window) and is now widely used for buildings, wearable fabric, solar cells, and electronic devices. Daytime radiative cooling requires both high reflection in the solar spectrum and high absorption/emission in the 8 to 13 μm range. Previous multilayered structures were optimized by changing the thickness ratio of the layers, but the optical properties of multilayer thin films, such as absorptivity, transmissivity, and reflectivity, are determined by complex factors. In this work, several initial multilayer structures were selected and then the thickness of each layer was globally optimized; the theoretically smallest thickness with the best absorption performance was achieved in the 8 to 13 μm range, which significantly improved the cooling performance and reduced costs. We developed an optimized SiO2-Ta2O5 alternating multilayer photonic radiative cooling thin film and fabricated it using ion source assisted electron beam evaporation with an average emissivity of 0.876 within the 8 to 13 μm range and an average reflectivity of 0.963 in the 0.3 to 2.5 μm waveband; it achieved an average temperature reduction of 20.1°C lower than the uncoated substrate and 3.2°C lower than the ambient temperature under direct sunlight with an average solar power of 859.3 W/m2. [ABSTRACT FROM AUTHOR]

Published
2024
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44. Giant magnetoresistance properties in granular type (Co-Ag)/Ag multilayers

Author

Zhou, Shi-Ming, Wang, Yu, Zhu, Wei-Rong, Zhang, Rong-Jun, Zheng, Yu-Xiang, Jin, Qing-Yuan, Chen, Liang-Yao, You, Biao, Ji, Wu, Hu, An, Zhai, Hongru, and Shen, Honglie

Subjects
Thin films, Multilayered -- Research, Thin films -- Magnetic properties, Physics
Abstract

A study was conducted on sputtered granular type (Co-Ag)/Ag multilayers' giant magnetoresistance properties. The magnetoresistance ratio was found to rise to a maximum and then decrease when the Ag layer thickness is increased. An increase in the Co content in the magnetic layers was found to result in maximum shifts to Ag layer thickness. The magnetoresistance effects were caused by antiferromagnetic coupling between the Co-Ag layers' Co clusters.

Published
1998

49. Study of the Kerr effect of Co(sub x)Ag(sub 100-X) granular films

Author

Wang, Song-You, Zheng, Wei-Min, Qian, Dong-Liang, Zhang, Rong-Jun, Zheng, Yu-Xiang, Zhou, Shi-Ming, Yang, Yue-Mei, Li, Bai-Yun, and Chen, Liang-Yao

Subjects
Magnetism -- Research, Thin films -- Research, Dielectrics -- Research, Magneto-optics -- Research, Annealing -- Research, Physics
Abstract

A study was conducted to analyze the Kerr effect of Co(sub x)Ag(sub 100-x) granular films. The films were annealed at 100, 250, 400 and 500 degrees C. The dielectric function and the Kerr effect were determined using a spectroscopic ellipsometer and a magneto-optical kerr spectrometer in the 1.5-4.5 eV photon energy range. Experimental results indicated that the Kerr effect improved with increases in the annealing temperature.

Published
1999

50. Study of magneto-optical properties of Ni:SiO2 granular films

Author

Zhang, Rong-Jun, Chen, Liang-Yao, Wang, Song-You, Qian, Dong-Liang, Zheng, Yu-Xiang, Zhou, Shi-Ming, Yang, Yue-Mei, Dai, Ning, Wang, Yu, Zhang, Xi-Xiang, and Yan, Xiao

Subjects
Magnetism -- Research, Thin films -- Magnetic properties, Magneto-optics -- Research, Sputtering (Physics) -- Research, Physics
Abstract

A study was conducted to analyze the magneto-optical characteristics of Ni:SiO2 granular films. The films were made using a magnetron rf sputtering system. The metal ni and SiO2 were placed on two separate sputtering guns. Experimental results indicated that the off-diagonal terms of the dielectric tensor and the optical constants correlate to an improvement of the Kerr effect in a specific spectral range for the films.

Published
1999

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