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

被引：7
|
作者：
Yonezu, Yuya [1 ,2 ]
Kou, Rai [3 ,4 ,5 ]
Nishi, Hidetaka [3 ,4 ]
Tsuchizawa, Tai [3 ,4 ]
Yamada, Koji [3 ,4 ,5 ]
Aoki, Takao [2 ]
Ishizawa, Atsushi [1 ]
Matsuda, Nobuyuki [1 ,4 ,6 ]
机构：
[1] NTT Corp, NTT Basic Res Labs, Atsugi, Kanagawa 2430198, Japan
[2] Waseda Univ, Dept Appl Phys, Shinjuku Ku, Tokyo 1698555, Japan
[3] NTT Corp, NTT Device Technol Labs, Atsugi, Kanagawa 2430198, Japan
[4] NTT Corp, NTT Nanophoton Ctr, Atsugi, Kanagawa 2430198, Japan
[5] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058569, Japan
[6] Tohoku Univ, Dept Commun Engn, Grad Sch Engn, Aoba Ku, Sendai, Miyagi 9808579, Japan
来源：
OPTICS EXPRESS | 2019年 / 27卷 / 21期
基金：
日本学术振兴会;
关键词：
CORRELATED PHOTONS; REFRACTIVE-INDEX;
D O I：
10.1364/OE.27.030262
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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 chi((3))-based effective nonlinear refractive index of graphene is on the order of 10(-13) m(2)/W, and provide important insights for applications of graphene-based nonlinear optics in on-chip nanophotonics. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
引用
收藏
页码：30262 / 30271
页数：10
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