Charge separation of dense two-dimensional electron-hole gases: Mechanism for exciton ring pattern formation

被引：130
作者：
Rapaport, R
Chen, G
Snoke, D
Simon, SH
Pfeiffer, L
West, K
Liu, Y
Denev, S
机构：
[1] Bell Labs, Lucent Technol, Murray Hill, NJ 07974 USA
[2] Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA
来源：
PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 11期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1103/PhysRevLett.92.117405
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We report on new experiments and theory that unambiguously resolve the recent puzzling observation of large diameter exciton emission halos around a laser excitation spot in two dimensional systems. We find a novel separation of plasmas of opposite charge with emission from the sharp circular boundary between these two regions. This charge separation allows for cooling of initially hot optically generated carriers as they dwell in the charge reservoirs for very long times.
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页码：117405 / 1
页数：4
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