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

页码：30262 / 30271

页数：10

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