Raman spectra of CdTe/ZnTe self-assembled quantum dots

被引：6
|
作者：
Romcevic, N. [1 ]
Romcevic, M. [1 ]
Kostic, R. [1 ]
Stojanovic, D. [1 ]
Karczewski, G. [2 ]
Galazka, R. [2 ]
机构：
[1] Inst Phys, Belgrade 11001, Serbia
[2] Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland
来源：
MICROELECTRONICS JOURNAL | 2009年 / 40卷 / 4-5期
关键词：
Photoluminescence; Raman spectroscopy; Quantum dots; Multiphonon;
D O I：
10.1016/j.mejo.2008.11.037
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this paper, we present Raman scattered spectra and results of photoluminescence (PL) measurements of CdTe/ZnTe self-assembled quantum dots (SAQD). The PL spectrum displayed two main emission peaks, both connected with the existing of QDs. One presents direct deexcitation to ground state and the other is optical phonon (omega = 204.2 cm(-1))-assisted deexcitation. The registered multiphonon (MP) emission process depends on temperature. At low temperature, one-phonon spectra shows line at 200.4 and 210.3 cm(-1) (ZnTe LO mode confined by degenerate superlattices), 217 cm(-1) (TA+LO in ZnTe) and 386 cm(-1) (LO+TO(Gamma) in ZnTe). (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：830 / 831
页数：2
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