標題: The formation mechanisms and optical characteristics of GaSb quantum rings
作者: Lin, Wei-Hsun
Wang, Kai-Wei
Liao, Yu-An
Pao, Chun-Wei
Lin, Shih-Yen
光電學院
電子物理學系
光電工程學系
College of Photonics
Department of Electrophysics
Department of Photonics
公開日期: 7-Aug-2013
摘要: The growth mechanisms and optical characteristics of GaSb quantum rings (QRs) are investigated. Although As-for-Sb exchange is the mechanism responsible for the dot-to-ring transition, significant height difference between GaSb quantum dots (QDs) and QRs in a dot/ring mixture sample suggests that the dot-to-ring transition is not a spontaneous procedure. Instead, it is a rapid transition procedure as long as it initiates. A model is established to explain this phenomenon. Larger ring inner diameters and heights of the sample with longer post Sb soaking time suggest that As-for-Sb exchange takes places in both vertical and lateral directions. The decreasing ring densities, enlarged ring inner/outer diameters and eventually flat GaSb surfaces observed with increasing growth temperatures are resulted from enhanced adatom migration and As-for-Sb exchange with increasing growth temperatures. (C) 2013 AIP Publishing LLC.
URI: http://dx.doi.org/10.1063/1.4817419
http://hdl.handle.net/11536/22566
ISSN: 0021-8979
DOI: 10.1063/1.4817419
期刊: JOURNAL OF APPLIED PHYSICS
Volume: 114
Issue: 5
結束頁: 
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