Photoluminescence of charged magneto-excitons in InAs single quantum dots |
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Authors: | Akiko Natori Shin Ohnuma Nguyen Hong Quang |
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Affiliation: | Department of Electro-Communications, University of Electro-Communications, Chofu, Tokyo 182-8585, Japan |
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Abstract: | We calculated the photoluminescence spectra of charged magneto-excitons in single two-dimensional parabolic quantum dots, using an unrestricted Hartree–Fock method. The calculated luminescence spectra explain well the observed red shifts of transition energies of InAs/GaAs single quantum dot by additional electron capture in a dot. The magnetic-field-induced transition of the ground state configuration of trapped electrons causes drastic change in the photoluminescence spectra. The dependence of photoluminescence intensities of charged excitons on the excess energies of photogenerated carriers above the bulk GaAs energy gap is studied phenomenologically, by calculating the steady state electron population probability in a dot. |
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Keywords: | Charged exciton Quantum dot Photoluminescence Unrestricted Hartree–Fock method |
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