Moving beyond a simple model of luminescence rings in quantum well structures

The dramatic appearance of luminescence rings with radius of several hundred microns in quantum well structures can be understood through a fairly simple nonlinear model of the diffusion and recombination of electrons and holes in a driven nonequilibrium system. The ring corresponds to the boundary...

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Detalhes bibliográficos
Principais autores: Snoke, D, Denev, S, Liu, Y, Simon, S, Rapaport, R, Chen, G, Pfeiffer, L, West, K
Formato: Conference item
Publicado em: 2004
Descrição
Resumo:The dramatic appearance of luminescence rings with radius of several hundred microns in quantum well structures can be understood through a fairly simple nonlinear model of the diffusion and recombination of electrons and holes in a driven nonequilibrium system. The ring corresponds to the boundary between a positive hole gas and a negative electron gas in steady state. While this basic effect is now well understood, we discuss several other experimental results which cannot be explained by this simple model.