Share Email Print

Proceedings Paper

GaN-based vertical-cavity surface-emitting laser incorporating a TiO2 high-index-contrast grating
Author(s): Tsu-Chi Chang; Ehsan Hashemi; Jörgen Bengtsson; Johan Gustavsson; Åsa Haglund; Tien-Chang Lu
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

We demonstrate the first electrically injected GaN-based VCSEL with a TiO2 high-contrast grating (HCG) as the top mirror. The TiO2-HCG rested directly on the n-GaN without an airgap for mechanical stability. A VCSEL with an aperture diameter of 10 μm had a threshold current of 25 mA under pulsed operation at room temperature. Multiple longitudinal modes coexist around 400 nm, each TM-polarized with a linewidth of 0.5 nm (spectral resolution limited). This first demonstration of a TiO2-HCG VCSEL offers a new route to achieve polarization pinning and could also allow additional benefits such as post-growth setting of resonance wavelength.

Paper Details

Date Published: 16 February 2020
PDF: 6 pages
Proc. SPIE 11280, Gallium Nitride Materials and Devices XV, 112800M (16 February 2020); doi: 10.1117/12.2545315
Show Author Affiliations
Tsu-Chi Chang, National Chiao Tung Univ. (Taiwan)
Ehsan Hashemi, Chalmers Univ. of Technology (Sweden)
Jörgen Bengtsson, Chalmers Univ. of Technology (Sweden)
Johan Gustavsson, 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. 11280:
Gallium Nitride Materials and Devices XV
Hiroshi Fujioka; Hadis Morkoç; Ulrich T. Schwarz, Editor(s)

© SPIE. Terms of Use
Back to Top
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?