Triangular cross-section grating couplers for integrated quantum nanophotonic hardware in silicon carbide
Optics
2025-04-24 v2
Abstract
We design, fabricate, and characterize fishbone grating couplers for triangular cross-section photonics in silicon carbide compatible with color center integration. The periodic and aperiodic grating coupler designs are optimized to outcouple up to 31% of light in the fundamental TE mode of a triangular waveguide. The devices are fabricated using an ion beam etching process in a 4H-SiC sample implanted with NV center ensembles. The room-temperature transmission and the cryogenic NV center photoluminescence collection measurements indicate experimental grating coupler efficiency of up to 24%. This result provides a scalable method to efficiently extract color center light from SiC quantum nanophotonic devices to free-space optics.
Keywords
Cite
@article{arxiv.2410.12150,
title = {Triangular cross-section grating couplers for integrated quantum nanophotonic hardware in silicon carbide},
author = {Pranta Saha and Alex H. Rubin and Sridhar Majety and Scott Dhuey and Marina Radulaski},
journal= {arXiv preprint arXiv:2410.12150},
year = {2025}
}