Hybrid grating reflector with high reflectivity and broad bandwidth

Alireza Taghizadeh, Gyeong Cheol Park, Jesper Mørk, Il-Sug Chung

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Abstract

We suggest a new type of grating reflector denoted hybrid grating (HG) which shows large reflectivity in a broad wavelength range and has a structure suitable for realizing a vertical cavity laser with ultra-small modal volume. The properties of the grating reflector are investigated numerically and explained. The HG consists of an un-patterned III-V layer and a Si grating. The III-V layer has a thickness comparable to the grating layer, introduces more guided mode resonances and significantly increases the bandwidth of the reflector compared to the well-known high-index-contrast grating (HCG). By using an active III-V layer, a laser can be realized where the gain region is integrated into the mirror itself
Original languageEnglish
JournalOptics Express
Volume22
Issue number18
Pages (from-to)21175-21184
ISSN1094-4087
DOIs
Publication statusPublished - 2014

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