標題: Ultrafast spin-polarized lasing in a highly photoexcited semiconductor microcavity at room temperature
作者: Hsu, Feng-kuo
Xie, Wei
Lee, Yi-Shan
Lin, Sheng-Di
Lai, Chih-Wei
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
公開日期: 14-五月-2015
摘要: We demonstrate room-temperature spin-polarized ultrafast (similar to 10 ps) lasing in a highly optically excited GaAs microcavity. This microcavity is embedded with InGaAs multiple quantum wells in which the spin relaxation time is less than 10 ps. The laser radiation remains highly circularly polarized even when excited by nonresonant elliptically polarized light. The lasing energy is not locked to the bare cavity resonance, and shifts similar to 10 meV as a function of the photoexcited density. Such spin-polarized lasing is attributed to a spin-dependent stimulated process of correlated electron-hole pairs. These pairs are formed near the Fermi edge in a high-density electron-hole plasma coupled to the cavity light field.
URI: http://dx.doi.org/10.1103/PhysRevB.91.195312
http://hdl.handle.net/11536/124814
ISSN: 1098-0121
DOI: 10.1103/PhysRevB.91.195312
期刊: PHYSICAL REVIEW B
Volume: 91
Issue: 19
顯示於類別:期刊論文