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Proceedings Paper

Triggering of guiding and antiguiding effects in GaN-based VCSELs
Author(s): Ehsan Hashemi; Jörgen Bengtsson; Johan Gustavsson; Martin Stattin; Marlene Glauser; Gatien Cosendey; Nicolas Grandjean; Marco Calciati; Michele Goano; Åsa Haglund
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Paper Abstract

We show numerically that many recently proposed GaN-based VCSEL cavities, with DBR mirrors deposited onto the current aperture, balance dangerously close to the border between the guided and antiguided regime. A guided cavity is often preferred because of its lower optical loss, but a strongly antiguided cavity offers built-in modal discrimination favoring single fundamental mode operation. We show that very small changes in the VCSEL structure are sufficient to strongly change the guiding character of the VCSEL cavity, and that thermal lensing caused by device self-heating under operation can dramatically reduce the optical loss but not the modal discrimination in the antiguided cavities.

Paper Details

Date Published: 27 February 2014
PDF: 8 pages
Proc. SPIE 9001, Vertical-Cavity Surface-Emitting Lasers XVIII, 90010A (27 February 2014); doi: 10.1117/12.2038152
Show Author Affiliations
Ehsan Hashemi, Chalmers Univ. of Technology (Sweden)
Jörgen Bengtsson, Chalmers Univ. of Technology (Sweden)
Johan Gustavsson, Chalmers Univ. of Technology (Sweden)
Martin Stattin, Chalmers Univ. of Technology (Sweden)
Marlene Glauser, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Gatien Cosendey, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Nicolas Grandjean, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Marco Calciati, Politecnico di Torino (Italy)
Michele Goano, Politecnico di Torino (Italy)
Åsa Haglund, Chalmers Univ. of Technology (Sweden)

Published in SPIE Proceedings Vol. 9001:
Vertical-Cavity Surface-Emitting Lasers XVIII
James K. Guenter; Chun Lei, Editor(s)

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