Effects of Inhomogeneous Gain and Loss on Nitride-Based Vertical-Cavity Surface Emitting Lasers

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题名:	Effects of Inhomogeneous Gain and Loss on Nitride-Based Vertical-Cavity Surface Emitting Lasers
作者:	Chen,SW;Lo,MH;Kao,TT;Kao,CC;Chu,JT;Lin,LF;Huang,HW;Lu,TC;Kuo,HC;Wang,SC;Kuo,CC;Lee,CC
贡献者:	薄膜技術中心
日期:	2009
上传时间:	2010-06-29 19:15:56 (UTC+8)
出版者:	中央大學
摘要:	Nitride-based vertical cavity surface emitting lasers (VCSEL) with hybrid mirror has been investigated. We further measured the as-grown samples (without top dielectric distributed Bragg reflector) by p-photoluminescence, scanning near-field optical microscopy, and cathodoluminescence (CL). By different excitation power density, the experimental results indicated that the VCSEL devices have different lasing modes and spot sizes, represented inhomogeneous gain and loss distribution in the whole structure. The non-uniform emission intensity distribution including several bright spots of about 1 to 2 pm was observed for both VCSEL devices and as-grown samples, which was obtained from CL measurement, due to the effect of indium clusters and non-uniform micro-cavity resonant in InGaN multi-quantum wells (MQWs). The results show the significant influence on commercial applications such as light emitting diodes, lasers devices and so on. (C) 2009 The Japan Society of Applied Physics
關聯:	JAPANESE JOURNAL OF APPLIED PHYSICS
显示于类别:	[薄膜技術研究中心] 期刊論文

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