Two-photon absorption in single site-controlled InGaN/GaN quantum dots

被引：5
|
作者：
Jarjour, AF [1 ]
Parker, TJ [1 ]
Taylor, RA [1 ]
Martin, RW [1 ]
Watson, IM [1 ]
机构：
[1] Univ Oxford, Dept Phys, Oxford OX1 3PU, England
来源：
Physica Status Solidi C - Conferences and Critical Reviews, Vol. 2 , No 11 | 2005年 / 2卷 / 11期
关键词：
D O I：
10.1002/pssc.200562028
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We present micro-photoluminescence measurements on single site-controlled InGaN/GaN quantum dots using two-photon excitation Furthermore, measurements of photoluminescence excitation and time-resolved photoluminescence are also presented. We show that two-photon excitation results in total suppression of the emission from the underlying quantum well, to which the quantum dots are couple, and yet strong quantum dot emission. We attribute this effect to the enhancement of the two-photon absorption in the quantum dots as a result of the zero-dimensional confinement compared to that of the quantum wells. (c) 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
引用
收藏
页码：3843 / 3846
页数：4
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