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Optical spectra of quantum dots: effects of non-adiabaticity | | J. T. Devreese
; V. M. Fomin
; E. P. Pokatilov
; V. N. Gladilin
; S. N. Klimin
; | | Date: |
25 Aug 2003 | | Journal: | Phys. Stat. Sol. (c) 0 (2003) 1189 | | Subject: | Mesoscopic Systems and Quantum Hall Effect | cond-mat.mes-hall | | Affiliation: | 1,2), E. P. Pokatilov , V. N. Gladilin (1,2), S. N. Klimin (1,2) ( TFVS, Universiteit Antwerpen - UIA, FSM, Universitatea de Stat din Moldova | | Abstract: | It is shown that in many cases an adequate description of optical spectra of semiconductor quantum dots requires a treatment beyond the commonly used adiabatic approximation. We have developed a theory of phonon-assisted optical transitions in semiconductor quantum dots, which takes into account non-adiabaticity of the exciton-phonon system. Effects of non-adiabaticity lead to a mixing of different exciton and phonon states that provides a key to the understanding of surprisingly high intensities of phonon satellites observed in photoluminescence spectra of quantum dots. A breakdown of the adiabatic approximation gives an explanation also for discrepancies between the serial law, observed in multi-phonon optical spectra of some quantum dots, and the Franck-Condon progression, prescribed by the adiabatic approach. | | Source: | arXiv, cond-mat/0308482 | | Services: | Forum | Review | PDF | Favorites | |
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