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Optical Engineering

High-performance subwavelength grating coupler based on high-reflectivity grating reflector
Author(s): Junbo Yang; Jingjing Zhang; Suzhi Xu; Shengli Chang
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Paper Abstract

A high-performance and compact binary blazed subwavelength grating coupler was designed, which consists of the upper grating coupler and the lower layer grating reflector. A large part of light transmitted out to the substrate due to the existence of gratings can be efficiently reflected with normal incidence. Then, the propagating light is augmented and the coupling efficiency obtains its maximum value. By the appropriate choice of grating parameters, including thicknesses, periods, height, and filling factor, a coupling efficiency of beyond 80% at wavelengths from 1.535 to 1.555  μm is calculated. Finally, the device layout is simple, feasible, and compatible with standard complementary metal-oxide semiconductor technology processing.

Paper Details

Date Published: 15 September 2014
PDF: 4 pages
Opt. Eng. 53(9) 096107 doi: 10.1117/1.OE.53.9.096107
Published in: Optical Engineering Volume 53, Issue 9
Show Author Affiliations
Junbo Yang, National Univ. of Defense Technology (China)
Peking Univ. (China)
Jingjing Zhang, National Univ. of Defense Technology (China)
Suzhi Xu, National Univ. of Defense Technology (China)
Shengli Chang, National Univ. of Defense Technology (China)


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