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19 April 2024 |
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Photoluminescence Spectra of Quantum Dots: Enhanced Efficiency of the Electron-Phonon Interaction | | J. T. Devreese
; V. M. Fomin
; V. N. Gladilin
; S. N. Klimin
; | | Date: |
23 Jul 2001 | | Journal: | Phys. Stat. Sol. (b) 224 (2001) 609-612 | | Subject: | Mesoscopic Systems and Quantum Hall Effect | cond-mat.mes-hall | | Affiliation: | Universiteit Antwerpen - UIA | | Abstract: | A theory of photoluminescence in semiconductor quantum dots is developed which relies on two key ingredients. First, it takes into account non-adiabaticity of the exciton-phonon system. Second, it includes the multimode dielectric model of LO-phonons and of the electron-phonon interaction in confined systems. The role of non-adiabaticity is shown to be of paramount importance in spherical quantum dots, where the lowest one-exciton state can be degenerate or quasi-degenerate. For various quantum dot structures, the calculated intensities of phonon satellites as a function of temperature, excitation energy and size of quantum dots are in a fair agreement with experimental data on photoluminescence. | | Source: | arXiv, cond-mat/0107474 | | Services: | Forum | Review | PDF | Favorites | |
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