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Proceedings Paper

High-order grating coupler for high-efficiency vertical to in-plane coupling
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Paper Abstract

We present here the design of a robust broadband high efficiency surface-normal vertical to in-plane optical coupler using fourth-order gratings. The fourth-order gratings can be designed such that the zero-order diffraction is suppressed while the diffraction efficiencies of the higher orders are enhanced for the in-plane coupling. We numerically demonstrated the surface normal incidence light coupling efficiency of 88.5% at 1,535 nm with a 3 dB bandwidth of 42 nm and 1dB bandwidth of 28 nm. Large fabrication tolerance of the fourth-order grating is also assessed.

Paper Details

Date Published: 19 February 2014
PDF: 6 pages
Proc. SPIE 8995, High Contrast Metastructures III, 89950W (19 February 2014); doi: 10.1117/12.2040317
Show Author Affiliations
Arvinder Singh Chadha, The Univ. of Texas at Arlington (United States)
Yichen Shuai, The Univ. of Texas at Arlington (United States)
Weidong Zhou, The Univ. of Texas at Arlington (United States)


Published in SPIE Proceedings Vol. 8995:
High Contrast Metastructures III
Connie J. Chang-Hasnain; David Fattal; Fumio Koyama; Weimin Zhou, Editor(s)

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