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Proceedings Paper

Mode suppression in metal filled photonic crystal vertical cavity lasers
Author(s): Benjamin G. Griffin; Amir Arbabi; Lynford L. Goddard
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Paper Abstract

Simulation results for an etched air hole photonic crystal (PhC) vertical cavity surface emitting laser (VCSEL) structure with various thicknesses of metal deposited inside the holes are presented. The higher-order modes of the structure are more spread out than the fundamental mode, and penetrate into the metal-filled holes. Due to the lossy nature of the metal, these higher-order modes experience a greater loss than the fundamental mode, resulting in an enhanced side mode suppression ratio (SMSR). A figure of merit for determining which metals would have the greatest impact on the SMSR is derived and validated using a transmission matrix method calculation. A full three-dimensional simulation of the PhC VCSEL structure is performed using the plane wave admittance method, and SMSRs are calculated for increasing metal thicknesses. Of the metals simulated, chromium provided the greatest SMSR enhancement with more than a 4 dB improvement with 500 nm of metal for an operating current of 12 times threshold.

Paper Details

Date Published: 7 February 2012
PDF: 8 pages
Proc. SPIE 8276, Vertical-Cavity Surface-Emitting Lasers XVI, 82760N (7 February 2012); doi: 10.1117/12.912552
Show Author Affiliations
Benjamin G. Griffin, Univ. of Illinois at Urbana-Champaign (United States)
Amir Arbabi, Univ. of Illinois at Urbana-Champaign (United States)
Lynford L. Goddard, Univ. of Illinois at Urbana-Champaign (United States)

Published in SPIE Proceedings Vol. 8276:
Vertical-Cavity Surface-Emitting Lasers XVI
Chun Lei; Kent D. Choquette, Editor(s)

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