Heterostructure optical phonons in dynamics of quantum dot electronic excitations: new experimental evidences

A. V. Baranov; V. G. Davydov; Anatoli V. Fedorov; H.-W. Ren; Shigeo Sugou; Yasuaki Masumoto

doi:10.1117/12.513860

11 June 2003 Heterostructure optical phonons in dynamics of quantum dot electronic excitations: new experimental evidences

A. V. Baranov, V. G. Davydov, Anatoli V. Fedorov, H.-W. Ren, Shigeo Sugou, Yasuaki Masumoto

Author Affiliations +

Proceedings Volume 5023, 10th International Symposium on Nanostructures: Physics and Technology; (2003) https://doi.org/10.1117/12.513860
Event: 2003 Chapter books, 2003, Bellingham, WA, United States

Abstract

Unusual coupling of heterostructure optical phonons and electronic excitations in quantum dots (QD's) was observed by photoluminescence spectroscopy in strain-induced InGaAs/GaAs QD's (SIQD's) and self-assembled InAs/GaAs QD's (SAQD's). Phonon-assisted interband transitions in SIQD's were found to be governed by zone center bulk GaAs TO and LO phonons via deformation potential interaction, whereas polar interaction was inessential. For SAQD's, a n-doped GaAs substrate was found to effect on QD intraband relaxation of carriers via coupling between them and substrate LO-phonon-plasmon modes at spacing between QD's and substrate as long as 100 nm.

Citation Download Citation

A. V. Baranov, V. G. Davydov, Anatoli V. Fedorov, H.-W. Ren, Shigeo Sugou, and Yasuaki Masumoto "Heterostructure optical phonons in dynamics of quantum dot electronic excitations: new experimental evidences", Proc. SPIE 5023, 10th International Symposium on Nanostructures: Physics and Technology, (11 June 2003); https://doi.org/10.1117/12.513860

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