Efficient light couplers to topological slow light waveguides in valley photonic crystals
Optics
2023-11-27 v1 Applied Physics
Abstract
We numerically and experimentally demonstrate efficient light couplers between topological slow light waveguides in valley photonic crystals (VPhCs) and wire waveguides. By numerical simulations, we obtained a high coupling efficiency of -0.84 dB/coupler on average in the slow light regime of a group index ng = 10 - 30. Experimentally, we fabricated the couplers in a Si slab and measured the transmitted power of the devices. We realized a high coupling efficiency of approximately -1.2 dB/coupler in the slow light region of ng = 10 - 30, which is close to the result from the numerical simulations. These demonstrations will lay the groundwork for low-loss photonic integrated circuits using topological slow light waveguides.
Keywords
Cite
@article{arxiv.2311.13965,
title = {Efficient light couplers to topological slow light waveguides in valley photonic crystals},
author = {Hironobu Yoshimi and Takuto Yamaguchi and Satomi Ishida and Yasutomo Ota and Satoshi Iwamoto},
journal= {arXiv preprint arXiv:2311.13965},
year = {2023}
}