Wavelength and fluence-dependent third-order optical nonlinearity of mono- and multi-layer graphene

被引：7

作者：

Ahn, Kwang Jun ^{[1
,2
]}

Gwak, Ji Yoon ^{[1
,2
]}

Lee, Byung Jic ^{[1
,2
]}

Choi, Sun Young ^{[3
]}

Kim, Mi Hye ^{[4
]}

Baek, In Hyung ^{[4
]}

Jeong, Young Uk ^{[4
]}

Rotermund, Fabian ^{[3
]}

机构：

[1] Ajou Univ, Dept Phys, Suwon 16499, South Korea

[2] Ajou Univ, Dept Energy Syst Res, Suwon 16499, South Korea

[3] Korea Adv Inst Sci & Technol, Dept Phys, Daejeon 34141, South Korea

[4] Korea Atom Energy Res Inst, Ctr Quantum Beam Based Radiat Res, Daejeon 34057, South Korea

来源：

APPLIED OPTICS | 2017年 / 56卷 / 36期

基金：

新加坡国家研究基金会;

关键词：

INVERSE SATURABLE ABSORPTION; CHEMICAL-VAPOR-DEPOSITION; REFRACTIVE-INDEX; SHEETS;

D O I：

10.1364/AO.56.009920

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The objective of this study is to investigate third-order optical nonlinearities of monolayer and randomly stacked bi- and four-layer graphene samples, depending on wavelength and fluence of femtosecond laser pulses in the near-infrared spectral region. Nonlinear refractive indices and absorption coefficients, and in consequence, third-order susceptibilities of graphene samples, are determined by z-scan measurements at four different wavelengths and three fluence regimes categorized by nonlinear transmission measurements. In addition, nonlinear refractive indices are independently investigated by optical Kerr gate experiments, showing good agreement with z-scan results. Our study on third-order nonlinearities of mono-and multi-layer graphene samples is significant for understanding nonlinear optical characteristics of graphene and developing graphene-based nonlinear photonic devices. (C) 2017 Optical Society of America

引用

页码：9920 / 9924

页数：5

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