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Your search keyword '"Chunya Luo"' showing total 10 results
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10 results on '"Chunya Luo"'

1. Theoretical investigations on the electronic structure and optical properties of orthorhombic Ce0.7Nd0.3AlO3 under pressure.

Author

Dan Li, Chunya Luo, Zijuan Ji, Qiusha Zheng, and Huaixing Wang

Subjects
*OPTICAL properties, *BAND gaps, *VALENCE bands, *PERMITTIVITY, *LATTICE constants, *ELECTRONIC structure
Abstract

The electronic structure and optical properties of orthorhombic Ce0.7Nd0.3AlO3 under different pressures are studied with the Heyd-Scuseria-Ernzerhof screened hybrid functional. With the increase of pressure, both the lattice constants and the band gap show a decreasing trend. The pressure not only reduces the bandwidth of the middle and high valence bands but also increases the strength of the density of states. The main peak of the imaginary part of the dielectric constant and the static dielectric constant increase continuously with the increasing pressure. The blue-shift of prominent peaks of absorption coefficient, reflectivity, and energy-loss energy are obvious with the increasing pressure. [ABSTRACT FROM AUTHOR]

Published
2023
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9. A terahertz wave all-optical modulator based on quartz-based MAPbI3 thin film

Author

Huaixing Wang, Furi Ling, Chunya Luo, Chuanhui Wang, Yongrui Xiao, Zeyuan Chang, Xuncheng Wu, Weijun Wang, and Jianquan Yao

Subjects
Inorganic Chemistry, Organic Chemistry, Electrical and Electronic Engineering, Physical and Theoretical Chemistry, Atomic and Molecular Physics, and Optics, Spectroscopy, Electronic, Optical and Magnetic Materials
Published
2022

10. Active control of plasmon-induced transparency based on a GaAs/Si heterojunction in the terahertz range

Author

Jianquan Yao, Chunya Luo, Huaixing Wang, Dan Li, and Furi Ling

Subjects
Materials science, business.industry, Terahertz radiation, Screening effect, Organic Chemistry, Heterojunction, Conductivity, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Inorganic Chemistry, Resonator, Excited state, Optoelectronics, Electrical and Electronic Engineering, Physical and Theoretical Chemistry, business, Spectroscopy, Excitation, Plasmon
Abstract

Active control optical terahertz modulator based on incorporating n-type GaAs film as the active media into plasmon-induced transparency metasurface, was investigated theoretically and experimentally. From the experimental results it could be found that the resonances transmission of the plasmon-induced transparency was optically modulated and the transmission modulation depth of 87% was achieved at 0.56 THz. This may be due to the fact that when the pump excitation power was tuned from 0 mW to 1000 mW, larger numbers of excited carriers were excited in the electronic “p-n" junction and diffused across the heterojunction to the n-type GaAs film. It increased the conductivity of the n-type GaAs film from 2.29 × 103 S/m to 1.56 × 104 S/m. As a results, the capacitive split gaps of the PIT split-ring resonators were short-circuited and the coupling strength between the resonators was decreased owing to the screening effect caused by the photo-excited carriers.

Published
2021

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