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Photoluminescence of tetrahedral quantum-dot quantum wells | | V. A. Fonoberov
; E. P. Pokatilov
; V. M. Fomin
; J. T. Devreese
; | | Date: |
30 Dec 2003 | | Subject: | Mesoscopic Systems and Quantum Hall Effect | cond-mat.mes-hall | | Affiliation: | 1,2), E. P. Pokatilov , V. M. Fomin (3,4,1), J. T. Devreese (3,4) ( FSM, Universitatea de Stat din Moldova, NDL, University of California - Riverside, TFVS, Universiteit Antwerpen, TU Eindhoven | | Abstract: | Taking into account the tetrahedral shape of a quantum dot quantum well (QDQW) when describing excitonic states, phonon modes and the exciton-phonon interaction in the structure, we obtain within a non-adiabatic approach a quantitative interpretation of the photoluminescence spectrum of a single CdS/HgS/CdS QDQW. We find that the exciton ground state in a tetrahedral QDQW is bright, in contrast to the dark ground state for a spherical QDQW. The position of the phonon peaks in the photoluminescence spectrum is attributed to interface optical phonons. We also show that the experimental value of the Huang-Rhys parameter can be obtained only within the nonadiabatic theory of phonon-assisted transitions. | | Source: | arXiv, cond-mat/0401651 | | Other sources: | [GID 1033112] cond-mat/0602053 pmid15089704 | | Services: | Forum | Review | PDF | Favorites | |
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