Monolithic subwavelength high refractive-index-contrast grating VCSELs

Marcin Gębski; Maciej Dems; James A. Lott; Tomasz Czyszanowski

doi:10.1117/12.2213637

4 March 2016 Monolithic subwavelength high refractive-index-contrast grating VCSELs

Marcin Gębski, Maciej Dems, James A. Lott, Tomasz Czyszanowski

Proceedings Volume 9766, Vertical-Cavity Surface-Emitting Lasers XX; 97660M (2016) https://doi.org/10.1117/12.2213637
Event: SPIE OPTO, 2016, San Francisco, California, United States

Abstract

In this paper we present optical design and simulation results of vertical-cavity surface-emitting lasers (VCSELs) that incorporate monolithic subwavelength high refractive-index-contrast grating (MHCG) mirrors - a new variety of HCG mirror that is composed of high index material surrounded only on one side by low index material. We show the impact of an MHCG mirror on the performance of 980 nm VCSELs designed for high bit rate and energy-efficient optical data communications. In our design, all or part of the all-semiconductor top coupling distributed Bragg reflector mirror is replaced by an undoped gallium-arsenide MHCG. We show how the optical field intensity distribution of the VCSEL’s fundamental mode is controlled by the combination of the number of residual distributed Bragg reflector (DBR) mirror periods and the physical design of the topmost gallium-arsenide MHCG. Additionally, we numerically investigate the confinement factors of our VCSELs and show that this parameter for the MHCG DBR VCSELs may only be properly determined in two or three dimensions due to the periodic nature of the grating mirror.

Citation Download Citation

Marcin Gębski, Maciej Dems, James A. Lott, and Tomasz Czyszanowski "Monolithic subwavelength high refractive-index-contrast grating VCSELs", Proc. SPIE 9766, Vertical-Cavity Surface-Emitting Lasers XX, 97660M (4 March 2016); https://doi.org/10.1117/12.2213637

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