Asymmetric photoluminescence spectra from excitons in a coupled microcavity

被引:12
作者
Emam-Ismail, M [1 ]
Astratov, VN
Skolnick, MS
Whittaker, DM
Roberts, JS
机构
[1] Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England
[2] Toshiba Cambridge Res Ctr, Cambridge CB4 0HE, England
[3] Univ Sheffield, Dept Elect & Elect Engn, Sheffield S1 3JD, S Yorkshire, England
来源
PHYSICAL REVIEW B | 2000年 / 62卷 / 03期
关键词
D O I
10.1103/PhysRevB.62.1552
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Asymmetric photoluminescence (PL) emission from a coupled semiconductor microcavity, containing quantum wells in the upper cavity only, is reported. On resonance, the central polariton mode is Found to emit strongly in the direction towards the empty lower cavity, whereas in the opposite direction, towards the cavity containing the quantum wells, no central-mode PL is observed. At the same time, the spectra from the other modes in the system are independent of direction. The optical field resulting from the central mode is shown to be only strong at macroscopic distances away from the optically active excitons. A good fit to the spectra is obtained assuming elastic scattering of uncoupled excitons into the optically active polariton states.
引用
收藏
页码:1552 / 1555
页数:4
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