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We investigated high density excitation effects in propagation and diffusion processes of free excitons confined in an Lz‐gradient GaAs quantum well (QW). From measurements of µPL spectra, it was found that driving force owing to a confined‐energy gradient makes QW excitons propagate asymmetrically to the falling gradient direction. In addition, it was figured out that many body interactions among...
By using a J-photoluminescence (PL) detecting system, spatial diffusion and propagation processes of high density excitons were investigated in an Lz-gradient GaAs quantum well (QW) structure, in which the QW-excitons experience driving force due to an energy gradient of the Lz-depending confined energies of electrons and holes. We found asymmetric distribution of the PL intensity of the QW-excitons...
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