High-efficiency hybrid amorphous silicon grating couplers for sub-micron-sized lithium niobate waveguides.

Author(s) Jian, J.; Xu, P.; Chen, H.; He, M.; Wu, Z.; Zhou, L.; Liu, L.; Yang, C.; Yu, S.
Journal Opt Express
Date Published 2018 Nov 12
Abstract

We demonstrate hybrid amorphous silicon uniform grating couplers for efficient coupling between the standard single-mode fiber and sub-micron lithium niobate waveguides. The grating couplers exhibit coupling efficiency of -3.06 dB and 1-dB bandwidth of 55 nm. The amorphous silicon grating couplers can also provide a universal building block applicable to other photonic platforms such as silicon nitride waveguides, whose moderate refractive index values prevent high efficiency grating couplers to be fabricated in the native waveguide.

DOI 10.1364/OE.26.029651
ISSN 1094-4087
Citation Jian J, Xu P, Chen H, He M, Wu Z, Zhou L, et al. High-efficiency hybrid amorphous silicon grating couplers for sub-micron-sized lithium niobate waveguides. Opt Express. 2018;26(23):29651-29658.

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