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GaN vertical-cavity surface-emitting laser with a high-contrast grating reflector
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Paper Abstract

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 0.69MW/cm2 and a lasing wavelength at 369.1 nm. This first demonstration of lasing in a HCG GaN-based VCSEL opens up the possibility to explore all the potential benefits of HCGs in the blue and ultraviolet spectral regime.

Paper Details

Date Published: 21 February 2018
PDF: 6 pages
Proc. SPIE 10542, High Contrast Metastructures VII, 105420T (21 February 2018); doi: 10.1117/12.2289318
Show Author Affiliations
Tsu-Chi Chang, National Chiao Tung Univ. (Taiwan)
Shuo-Yi Kuo, National Chiao Tung Univ. (Taiwan)
Ehsan Hashemi, Chalmers Univ. of Technology (Sweden)
Åsa Haglund, Chalmers Univ. of Technology (Sweden)
Tien-Chang Lu, National Chiao Tung Univ. (Taiwan)


Published in SPIE Proceedings Vol. 10542:
High Contrast Metastructures VII
Connie J. Chang-Hasnain; Andrei Faraon; Fumio Koyama; Weimin Zhou, Editor(s)

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