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Ultrafast Kerr rotations and zero-field dephasing time of electron spins in InAs/GaAs quantum disks
Ning JQ (Ning J. Q.); Xu SJ (Xu S. J.); Wei ZF (Wei Z. F.); Ruan XZ (Ruan X. Z.); Ji Y (Ji Yang); Zheng HZ (Zheng H. Z.); Liu HC (Liu H. C.); Xu, SJ, Univ Hong Kong, Dept Phys, Pokfulam Rd, Hong Kong, Hong Kong, Peoples R China. 电子邮箱地址: sjxu@hkucc.hku.hk
2010
Source PublicationPHYSICS LETTERS A
Volume374Issue:47Pages:4793-4796
AbstractTime-resolved Kerr rotation (TRKR) measurements based on pump-probe arrangement were carried out at 5 K on the monolayer fluctuation induced InAs/GaAs quantum disks grown on GaAs substrate without external magnetic field. The lineshape of TRKR signals shows an unusual dependence on the excitation wavelength, especially antisymmetric step-shaped structures appearing when the excitation wavelength was resonantly scanned over the heavy- and light-hole subbands. Moreover, these step structures possess an almost identical decay time of similar to 40 Ps which is believed to be the characteristic spin dephasing time of electrons in the extremely narrow InAs/GaAs quantum disks.
metadata_24国内
KeywordOptical Kerr Effect Electron Spin Quantum Disks Inas/gaas Refractive-index Coherence Gaas Semiconductors
Subject Area半导体物理
Funding OrganizationThe work was supported by Hong Kong RGC-GRF Grants (No. HKU 7049/08P) in Hong Kong and by NSFC Grant (No. 10425419) in Beijing. One of the authors, SJX, would like to thank W.D. Sheng, W. Yao, and F.C. Zhang for their discussions.
Indexed BySCI
Language英语
Date Available2010-12-05
Document Type期刊论文
Identifierhttp://ir.semi.ac.cn/handle/172111/20665
Collection半导体超晶格国家重点实验室
Corresponding AuthorXu, SJ, Univ Hong Kong, Dept Phys, Pokfulam Rd, Hong Kong, Hong Kong, Peoples R China. 电子邮箱地址: sjxu@hkucc.hku.hk
Recommended Citation
GB/T 7714
Ning JQ ,Xu SJ ,Wei ZF ,et al. Ultrafast Kerr rotations and zero-field dephasing time of electron spins in InAs/GaAs quantum disks[J]. PHYSICS LETTERS A,2010,374(47):4793-4796.
APA Ning JQ .,Xu SJ .,Wei ZF .,Ruan XZ .,Ji Y .,...&Xu, SJ, Univ Hong Kong, Dept Phys, Pokfulam Rd, Hong Kong, Hong Kong, Peoples R China. 电子邮箱地址: sjxu@hkucc.hku.hk.(2010).Ultrafast Kerr rotations and zero-field dephasing time of electron spins in InAs/GaAs quantum disks.PHYSICS LETTERS A,374(47),4793-4796.
MLA Ning JQ ,et al."Ultrafast Kerr rotations and zero-field dephasing time of electron spins in InAs/GaAs quantum disks".PHYSICS LETTERS A 374.47(2010):4793-4796.
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