Triggering of guiding and antiguiding effects in GaN-based VCSELs
Conference contribution, 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

Author

Seyed Ehsan Hashemi

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Jörgen Bengtsson

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Johan Gustavsson

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Martin Stattin

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

M. Glauser

Ecole Polytechnique Federale De Lausanne

Gatien Cosendey

Ecole Polytechnique Federale De Lausanne

N.R. Grandjean

Ecole Polytechnique Federale De Lausanne

M. Calciati

Polytechnic University of Turin

M. Goano

Polytechnic University of Turin

Åsa Haglund

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Proceedings of SPIE - The International Society for Optical Engineering

0277786X (ISSN) 1996756X (eISSN)

Vol. 9001 90010A

Subject Categories

Other Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1117/12.2038152

ISBN

9780819499141

More information

Latest update

8/28/2018