標題: | Formation of transverse modes with Y-junction structures in broad-area oxide-confined vertical-cavity surface-emitting laser |
作者: | Kou, RJ Pan, CL 光電工程學系 Department of Photonics |
關鍵字: | y-junction;transverse mode;broad-area oxide-confined vertical surface-emitting laser;Laguerre-Gaussian mode |
公開日期: | 15-七月-2003 |
摘要: | We performed experimental and theoretical investigations on the transverse-mode emission behavior of a broad-area oxide-confined vertical-cavity surface-emitting laser (VCSEL). The far-field emission pattern with y-junction structures is observed in the VCSEL with a 20-mum-diameter aperture when the injection current is significantly above the thermal roll-over point. In order to provide a quantitative understanding of these emission characteristics, we present a numerical simulation to model and fit the experimental results. The numerical simulation adopts the high-order Laguerre-Gaussian mode due to the assumptions of a parabolic refractive-index profile and ring-shaped carrier distribution in the laser. From the numerical simulation results, the formation of y-junction structures is inferred to be caused by the superposition of two high-order Laguerre-Gaussian modes. The results of this numerical simulation are in good agreement with the experimental findings. |
URI: | http://dx.doi.org/10.1143/JJAP.42.L824 http://hdl.handle.net/11536/27711 |
ISSN: | 0021-4922 |
DOI: | 10.1143/JJAP.42.L824 |
期刊: | JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS |
Volume: | 42 |
Issue: | 7B |
起始頁: | L824 |
結束頁: | L827 |
顯示於類別: | 期刊論文 |