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Chung, Il-Sug
Nano-Optoelectronics Lab.
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Hybrid grating reflector with high reflectivity and broad bandwidth

Author(s)
Taghizadeh, AlirezaPark, Gyeong CheolMork, JesperChung, Il-Sug
Issued Date
2014-09
DOI
10.1364/OE.22.021175
URI
https://scholarworks.unist.ac.kr/handle/201301/23717
Fulltext
https://www.osapublishing.org/oe/abstract.cfm?uri=oe-22-18-21175
Citation
OPTICS EXPRESS, v.22, no.18, pp.21175 - 21184
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.
Publisher
OPTICAL SOC AMER
ISSN
1094-4087

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