標題: Lasing action in GaN-based VCSELs with top high-contrast grating reflectors
作者: Chang, Tsu-Chi
Kuo, Shuo-Yi
Hashemi, Ehsan
Haglund, Asa
Lu, Tien-Chang
光電工程學系
Department of Photonics
關鍵字: TiO2;high contrast grating (HCG);GaN;vertical cavity surface emitting laser (VCSEL)
公開日期: 1-Jan-2018
摘要: We report a GaN-based VCSEL with a high-contrast grating (HCG) as the top mirror. The HCG consisted of TiO2 and rested directly on the n-GaN without an airgap or the use of any DBR layers to boost the reflectivity. The full VCSEL structure was optically pumped at room temperature and showed a lasing threshold of approximately 0.99 MW/cm(2) and a lasing wavelength at 369.8 nm. The demonstration of HCG GaN-based VCSEL opens up the possibility to explore all the potential benefits of HCGs in the blue and ultraviolet spectral regime.
URI: http://hdl.handle.net/11536/150848
ISSN: 2326-5442
期刊: 2018 IEEE INTERNATIONAL SEMICONDUCTOR LASER CONFERENCE (ISLC)
起始頁: 191
結束頁: 192
Appears in Collections:Conferences Paper