Whispering gallery modes in zinc-blende AlN microdisks containing non-polar GaN quantum dots

被引：21
|
作者：
Buerger, M. [1 ]
Ruth, M. [1 ]
Declair, S. [1 ]
Foerstner, J. [1 ]
Meier, C. [1 ]
As, D. J. [1 ]
机构：
[1] Univ Paderborn, Dept Phys, D-33098 Paderborn, Germany
来源：
APPLIED PHYSICS LETTERS | 2013年 / 102卷 / 08期
关键词：
LASERS;
D O I：
10.1063/1.4793653
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Whispering gallery modes (WGMs) were observed in 60 nm thin cubic AlN microdisk resonators containing a single layer of non-polar cubic GaN quantum dots. Freestanding microdisks were patterned by means of electron beam lithography and a two step reactive ion etching process. Micro-photoluminescence spectroscopy investigations were performed for optical characterization. We analyzed the mode spacing for disk diameters ranging from 2-4 mu m. Numerical investigations using three dimensional finite difference time domain calculations were in good agreement with the experimental data. Whispering gallery modes of the radial orders 1 and 2 were identified by means of simulated mode field distributions. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4793653]
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页数：4
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