Evaluation of graphene optical nonlinearity with photon-pair generation in graphene-on-silicon waveguides
Optics
2020-03-23 v1 Quantum Physics
Abstract
We evaluate the nonlinear coefficient of graphene-on-silicon waveguides through the coincidence measurement of photon-pairs generated via spontaneous four-wave mixing. We observed the temporal correlation of the photon-pairs from the waveguides over various transfer layouts of graphene sheets. A simple analysis of the experimental results using coupled-wave equations revealed that the atomically-thin graphene sheets enhanced the nonlinearity of silicon waveguides up to ten-fold. The results indicate that the purely -based effective nonlinear refractive index of graphene is on the order of m/W, and provide important insights for applications of graphene-based nonlinear optics in on-chip nanophotonics.
Keywords
Cite
@article{arxiv.2003.09256,
title = {Evaluation of graphene optical nonlinearity with photon-pair generation in graphene-on-silicon waveguides},
author = {Yuya Yonezu and Rai Kou and Hidetaka Nishi and Koji Yamada and Takao Aoki and Atushi Ishizawa and Nobuyuki Matsuda},
journal= {arXiv preprint arXiv:2003.09256},
year = {2020}
}