Triggering of guiding and antiguiding effects in GaN-based VCSELs
Konferensbidrag (offentliggjort, men ej förlagsutgivet), 2014

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.

mode discrimination

antiguiding

thermal lensing effect

Gallium nitride vertical cavity surface emitting lasers

Författare

Seyed Ehsan Hashemi

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

Jörgen Bengtsson

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

Johan Gustavsson

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

Martin Stattin

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

M. Glauser

Ecole Polytechnique Federale De Lausanne

Gatien Cosendey

Ecole Polytechnique Federale De Lausanne

N.R. Grandjean

Ecole Polytechnique Federale De Lausanne

M. Calciati

Politecnico di Torino

M. Goano

Politecnico di Torino

Åsa Haglund

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

Proceedings of SPIE - The International Society for Optical Engineering

0277786X (ISSN) 1996756X (eISSN)

Vol. 9001 90010A

Ämneskategorier

Annan elektroteknik och elektronik

DOI

10.1117/12.2038152

ISBN

9780819499141