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

Ahn Kwang Jun; Gwak Ji Yoon; Lee Byung Jic; Choi Sun Young; Kim Mi Hye; Baek In Hyung; Jeong Young Uk; Rotermund Fabian

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

机译：单层和多层石墨烯的波长和流量依赖性三阶光学非线性

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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

机译：本研究的目的是研究单层和随机堆叠的双层石墨烯样品的三阶光学非线性，这取决于近红外光谱区域的飞秒激光脉冲的波长和流量。非线性折射率和吸收系数，因此，石墨烯样品的三阶敏感性由四个不同波长的Z扫描测量和由非线性传输测量分类的三个注重能力确定。此外，通过光学克尔门实验独立研究非线性折射率，显示出与Z扫描结果的良好一致性。我们对单层和多层石墨烯样品的三阶非线性的研究对于了解石墨烯的非线性光学特性和显影基于石墨烯的非线性光子器件的研究是显着的。（c）2017年光学学会

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来源
《Applied optics》 |2017年第36期|共5页
作者
Ahn Kwang Jun; Gwak Ji Yoon; Lee Byung Jic; Choi Sun Young; Kim Mi Hye; Baek In Hyung; Jeong Young Uk; Rotermund Fabian;
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Ajou Univ Dept Phys Suwon 16499 South Korea;

Ajou Univ Dept Phys Suwon 16499 South Korea;

Ajou Univ Dept Phys Suwon 16499 South Korea;

Korea Adv Inst Sci &

Technol Dept Phys Daejeon 34141 South Korea;

Korea Atom Energy Res Inst Ctr Quantum Beam Based Radiat Res Daejeon 34057 South Korea;

Korea Atom Energy Res Inst Ctr Quantum Beam Based Radiat Res Daejeon 34057 South Korea;

Korea Atom Energy Res Inst Ctr Quantum Beam Based Radiat Res Daejeon 34057 South Korea;

Korea Adv Inst Sci &

Technol Dept Phys Daejeon 34141 South Korea;

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

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