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Tuning of the Electron Spin Relaxation Anisotropy via Optical Gating in GaAs/AlGaAs Quantum Wells
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作者 牛秉慧 闫腾飞 +2 位作者 倪海桥 牛智川 张新惠 《Chinese Physics Letters》 SCIE CAS CSCD 2016年第10期120-123,共4页
The carrier-density-dependent spin relaxation dynamics for modulation-doped GaAs/Al0.3 Gao,TAs quantum wells is studied using the time-resolved magneto-Kerr rotation measurements. The electron spin relaxation time and... The carrier-density-dependent spin relaxation dynamics for modulation-doped GaAs/Al0.3 Gao,TAs quantum wells is studied using the time-resolved magneto-Kerr rotation measurements. The electron spin relaxation time and its in-plane anisotropy are studied as a function of the optically injected electron density, Moreover, the relative strength of the Rashba and the Dresselhaus spin-rbit coupling fields, and thus the observed spin relaxation time anisotropy, is further tuned by the additional excitation of a 532nm continuous wave laser, demonstrating an effective spin relaxation manipulation via an optical gating method. 展开更多
关键词 GAAS on is Tuning of the electron spin relaxation Anisotropy via Optical Gating in GaAs/AlGaAs Quantum Wells of in
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Spin Noise Spectroscopy in N-GaAs:Spin Relaxation of Localized Electrons
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作者 马健 史平 +2 位作者 钱轩 尚雅轩 姬扬 《Chinese Physics Letters》 SCIE CAS CSCD 2017年第7期215-218,共4页
Spin noise spectroscopy (SNS) of electrons in n-doped bulk GaAs is studied as functions of temperature and the probe-laser energy. Experimental results show that the SNS signal comes from localized electrons in the ... Spin noise spectroscopy (SNS) of electrons in n-doped bulk GaAs is studied as functions of temperature and the probe-laser energy. Experimental results show that the SNS signal comes from localized electrons in the donor band. The spin relaxation time of electrons~ which is retrieved from the SNS measurement, depends on the probe light energy and temperature, and it can be ascribed to the variation of electron localization degree. 展开更多
关键词 spin Noise Spectroscopy in N-GaAs:spin relaxation of Localized electrons SNS SRT
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