Symmetrically tunable optical properties of InGaN/GaN multiple quantum disks by an external stress

被引：2
|
作者：
Shih, H. Y. [1 ]
Chen, Y. F. [1 ]
Lin, T. Y. [2 ]
机构：
[1] Natl Taiwan Univ, Dept Phys, Taipei 106, Taiwan
[2] Natl Taiwan Ocean Univ, Inst Optoelect Sci, Keelung 202, Taiwan
来源：
APPLIED PHYSICS LETTERS | 2012年 / 100卷 / 17期
关键词：
WELLS; STRAIN;
D O I：
10.1063/1.4709397
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The influence of an external stress on the optical properties of InGaN/GaN multiple quantum disks (MQDs) has been investigated. As a transversal force is applied on the MQDs, both photoluminescence and Raman scattering spectra are altered due to the piezoelectric potential accompanied by the quantum confined Stark effect. Quite interestingly, it is found that the optical spectra possess a sixfold symmetry about the c-axis. This intriguing phenomenon can be attributed to the inherent nature of hexagonal lattice as well as the good flexibility of the composite consisting of polydimethylsiloxane and MQDs. Our results can provide an alternative route to optimize and extend the application of nitride-based devices. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4709397]
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页数：4
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