American Physical Society;American Physical Society (APS)
摘要:
摘要： We demonstrate room-temperature spin-polarized ultrafast (~ 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 ~ 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. 出版者： American Physical Society (APS) 出版日期： 2015-05-14 出處： Physical Review B, 2015-05, Vol.91 (19), Article 195312 識別號： ISSN: 1098-0121 識別號： EISSN: 1550-235X 識別號： DOI: 10.1103/physrevb.91.195312
