Effects of inhomogeneous gain and loss on nitride-based vertical-cavity surface emitting lasers

Shih Wei Chen, Ming Hua Lo, Tsung Ting Kao, Chih Chiang Kao, Jung Tang Chu, Li Fan Lin, Hung Wen Huang, Tien Chang Lu, Hao Chung Kuo, Shing Chung Wang, Chien Cheng Kuo, Cheng Chung Lee

研究成果: 雜誌貢獻期刊論文同行評審

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 μ-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 μm 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.

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文章編號04C127
期刊Japanese Journal of Applied Physics
48
發行號4 PART 2
DOIs
出版狀態已出版 - 4月 2009

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