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

Abstract:
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.
Publication status:
Published

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Authors


Rapaport, R More by this author
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Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Theoretical Physics
Pfeiffer, L More by this author
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Journal:
Physical review letters
Volume:
92
Issue:
11
Pages:
117405
Publication date:
2004-03-05
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
URN:
uuid:aa45fdc1-5caa-4420-8c58-3658508a07bf
Source identifiers:
168173
Local pid:
pubs:168173
Language:
English
Keywords:

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