Linear and nonlinear characteristics of time-resolved photoluminescence modulation by terahertz pulse

doi:10.1088/1674-1056/26/10/100201

中国物理B ›› 2017, Vol. 26 ›› Issue (10): 100201-100201.doi: 10.1088/1674-1056/26/10/100201

• GENERAL • 下一篇

Linear and nonlinear characteristics of time-resolved photoluminescence modulation by terahertz pulse

Jiao-Li Gong(龚姣丽), Jin-Song Liu(刘劲松), Man Zhang(张曼), Zheng Chu(褚政), Zhen-Gang Yang(杨振刚), Ke-Jia Wang(王可嘉), Jian-Quan Yao(姚建铨)

1. Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China;
2. Hubei Collaborative Innovation Center for High-efficient Utilization of Solar Energy, School of Science, Hubei University of Technology, Wuhan 430068, China

收稿日期:2017-04-10 修回日期:2017-05-10 出版日期:2017-10-05 发布日期:2017-10-05
通讯作者: Jin-Song Liu E-mail:jsliu4508@vip.sina.com
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11574105, 61475054, 61405063, and 61177095), the Hubei Science and Technology Agency Project, China (Grant No. 2015BCE052), and the Fundamental Research Funds for the Central Universities, China (Grant No. 2017KFYXJJ029).

Linear and nonlinear characteristics of time-resolved photoluminescence modulation by terahertz pulse

Jiao-Li Gong(龚姣丽)^1,2, Jin-Song Liu(刘劲松)¹, Man Zhang(张曼)¹, Zheng Chu(褚政)¹, Zhen-Gang Yang(杨振刚)¹, Ke-Jia Wang(王可嘉)¹, Jian-Quan Yao(姚建铨)¹

1. Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China;
2. Hubei Collaborative Innovation Center for High-efficient Utilization of Solar Energy, School of Science, Hubei University of Technology, Wuhan 430068, China

Received:2017-04-10 Revised:2017-05-10 Online:2017-10-05 Published:2017-10-05
Contact: Jin-Song Liu E-mail:jsliu4508@vip.sina.com
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11574105, 61475054, 61405063, and 61177095), the Hubei Science and Technology Agency Project, China (Grant No. 2015BCE052), and the Fundamental Research Funds for the Central Universities, China (Grant No. 2017KFYXJJ029).

摘要/Abstract

摘要： The linear and nonlinear characteristics of time-resolved photoluminescence (PL) of n-type bulk semiconductor GaAs modulated with terahertz (THz) pulse are studied by using an ensemble Monte Carlo (EMC) method. In this paper the center energy valley (Γ valley) electron concentration changes with the pulse delay time, sampling time and the outfield are mainly discussed. The results show that the sampling time and the THz field should exceed certain thresholds to effectively excite photoluminescence quenching (PLQ). Adopting a direct current (DC) field makes the sampling time threshold shortened and the linear range of THz field-modulation PL expanded. Moreover, controlling the sampling time and the outfield intensity can improve the linear quality:with forward time, the larger outfield is used; with backward time, the smaller outfield is used. This study can provide a theoretical basis of THz field linear modulation in a larger range for new light emitting devices.

关键词: THz pulse modulation, photoluminescence, ensemble Monte Carlo, intervalley scattering

Abstract: The linear and nonlinear characteristics of time-resolved photoluminescence (PL) of n-type bulk semiconductor GaAs modulated with terahertz (THz) pulse are studied by using an ensemble Monte Carlo (EMC) method. In this paper the center energy valley (Γ valley) electron concentration changes with the pulse delay time, sampling time and the outfield are mainly discussed. The results show that the sampling time and the THz field should exceed certain thresholds to effectively excite photoluminescence quenching (PLQ). Adopting a direct current (DC) field makes the sampling time threshold shortened and the linear range of THz field-modulation PL expanded. Moreover, controlling the sampling time and the outfield intensity can improve the linear quality:with forward time, the larger outfield is used; with backward time, the smaller outfield is used. This study can provide a theoretical basis of THz field linear modulation in a larger range for new light emitting devices.

Key words: THz pulse modulation, photoluminescence, ensemble Monte Carlo, intervalley scattering

中图分类号: (Distribution theory and Monte Carlo studies)

02.50.Ng

42.65.Re (Ultrafast processes; optical pulse generation and pulse compression) 42.65.Sf (Dynamics of nonlinear optical systems; optical instabilities, optical chaos and complexity, and optical spatio-temporal dynamics) 71.55.Eq (III-V semiconductors)

龚姣丽, 刘劲松, 张曼, 褚政, 杨振刚, 王可嘉, 姚建铨. Linear and nonlinear characteristics of time-resolved photoluminescence modulation by terahertz pulse[J]. 中国物理B, 2017, 26(10): 100201-100201.

Jiao-Li Gong(龚姣丽), Jin-Song Liu(刘劲松), Man Zhang(张曼), Zheng Chu(褚政), Zhen-Gang Yang(杨振刚), Ke-Jia Wang(王可嘉), Jian-Quan Yao(姚建铨). Linear and nonlinear characteristics of time-resolved photoluminescence modulation by terahertz pulse[J]. Chin. Phys. B, 2017, 26(10): 100201-100201.

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Linear and nonlinear characteristics of time-resolved photoluminescence modulation by terahertz pulse

Linear and nonlinear characteristics of time-resolved photoluminescence modulation by terahertz pulse

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