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Applied Physics Letters / Volume 100 / Issue 4 / STRUCTURAL, MECHANICAL, OPTICAL, AND THERMODYNAMIC PROPERTIES OF ADVANCED MATERIALS

Appl. Phys. Lett. 100, 041910 (2012); http://dx.doi.org/10.1063/1.3680095 (4 pages)

Effect of uni-axial strain on THz/far-infrared response of graphene

JooYoun Kim1, Chul Lee1, Sukang Bae2, Sang Jin Kim2, Keun Soo Kim3, Byung Hee Hong4, and E. J. Choi1

1Department of Physics, University of Seoul, Seoul 130-743, South Korea
2SKKU Advanced Institute of Nanotechnology (SAINT) and Center for Human Interface Nano Technology (HINT), Sungkyunkwan University, Suwon 440-746, South Korea
3Department of Physics and Graphene Research Institute, Sejong University, Seoul 143-747, South Korea
4Department of Chemistry, Seoul National University, Seoul 151-742, South Korea

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(Received 30 October 2011; accepted 9 January 2012; published online 27 January 2012)

We present polarized optical transmission study of uniaxially strained large scale graphene in THz/far-infrared (IR) frequency region. Graphene was supported on stretchable polyethylene substrate and they were elongated up to 20% (ΔL/Lo = 0.2) by applying tensile force. For the IR light polarized along the strain direction (EIR//strain), the optical conductivity σ1(ω) of graphene changes from Drude response into strongly non-Drude-like behavior with a peak formed at finite energy ∼10 meV. In contrast, the coherent Drude conductivity is preserved along the direction perpendicular to the strain (EIR⊥strain). Possible origin of the strain-induced non-Drude σ1(ω)-behavior is discussed.

© 2012 American Institute of Physics

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KEYWORDS and PACS

Keywords

elongation, graphene, infrared spectra, light transmission, optical conductivity, tensile strength, terahertz wave spectra

PACS

  • 78.67.Wj

    Optical properties of graphene

  • 78.20.Ci

    Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity)

  • 81.40.Lm

    Deformation, plasticity, and creep

  • 62.20.F-

    Deformation and plasticity

  • 78.70.Gq

    Microwave and radio-frequency interactions

  • 78.30.Na

    Fullerenes and related materials

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3680095

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
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    J. Y. Kim, C. Lee, S. K. Bae, K. S. Kim, B. H. Hong, and E. J. Choi, Appl. Phys. Lett. 98, 201907 (2011)APPLAB000098000020201907000001.

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