Ordered Dissipative Structures in Exciton Systems in Semiconductor Quantum Wells

A phenomenological theory of exciton condensation in conditions of inhomogeneous excitation is proposed. The theory is applied to the study of the development of an exciton luminescence ring and the ring fragmentation at macroscopical distances from the central excitation spot in coupled quantum wel...

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Bibliographic Details
Published in:Symmetry, integrability and geometry, methods and applications integrability and geometry, methods and applications, 2006-01, Vol.2, p.025
Main Author: Chernyuk, Andrey A.
Format: Article
Language:English
Subjects:
dissipative structures
exciton condensation
quantum wells
Online Access:Get full text
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Summary:A phenomenological theory of exciton condensation in conditions of inhomogeneous excitation is proposed. The theory is applied to the study of the development of an exciton luminescence ring and the ring fragmentation at macroscopical distances from the central excitation spot in coupled quantum wells. The transition between the fragmented and the continuous ring is considered. With assumption of a defect in the structure, a possibility of a localized island of the condensed phase in a fixed position is shown. Exciton density distribution is also analyzed in the case of two spatially separated spots of the laser excitation.
ISSN:1815-0659
1815-0659
DOI:10.3842/SIGMA.2006.025