Evaluation of graphene optical nonlinearity with photon-pair generation in graphene-on-silicon waveguides

Yuya Yonezu, Rai Kou, Hidetaka Nishi, Tai Tsuchizawa, Koji Yamada, Takao Aoki, Atsushi Ishizawa, Nobuyuki Matsuda

研究成果: Article査読

1 被引用数 (Scopus)

抄録

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 χ(3)-based effective nonlinear refractive index of graphene is on the order of 10−13 m2/W, and provide important insights for applications of graphene-based nonlinear optics in on-chip nanophotonics.

本文言語English
ページ(範囲)30262-30271
ページ数10
ジャーナルOptics Express
27
21
DOI
出版ステータスPublished - 2019 10 14

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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