Resonant Raman scattering in spherical quantum dots: II-VI versus III-V semiconductor nanocrystals

被引：13

作者：

Vasilevskiy, Mikhail I. ^{[1
]}

Trallero-Giner, Carlos ^{[2
]}

机构：

[1] Univ Minho, Ctr Fis, P-4710057 Braga, Portugal

[2] Univ La Habana, Dept Fis Teor, Havana 10400, Cuba

来源：

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2010年 / 247卷 / 06期

关键词：

II-VI semiconductors; III-V semiconductors; Raman spectroscopy; SPECTROSCOPY; TRANSITIONS; EXCITON; STATES;

D O I：

10.1002/pssb.200983230

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Resonant Raman scattering (RRS) in nearly-spherical nanocrystal (NC) quantum dots (QDs) is discussed with respect to the underlying (Frohlich-type and optical deformation potential, ODP) mechanisms of the exciton-phonon interaction. Their relative contribution for different QD materials, both II-VI and III-V is compared. It is shown that the (usually overlooked) ODP interaction is entirely responsible for an additional peak in the RRS spectra, situated near the transverse-optical (TO) phonon frequency, which has been observed for InP, InAs and, recently, CdTe QDs. RRS spectra calculated using continuum models for confined phonons and excitons and taking into account both interaction mechanisms are in excellent agreement with these experimental data. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

引用

页码：1488 / 1491

页数：4

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