High-field terahertz response of graphene

M. J. Paul; Y. C. Chang; Z. J. Thompson; A. Stickel; J. Wardini; H. Choi; E. D. Minot; T. B. Norris; Yun Shik Lee

doi:10.1088/1367-2630/15/8/085019

High-field terahertz response of graphene

M. J. Paul, Y. C. Chang, Z. J. Thompson, A. Stickel, J. Wardini, H. Choi, E. D. Minot, T. B. Norris, Yun Shik Lee

Department of Electrical and Electronic Engineering

Research output: Contribution to journal › Article › peer-review

84 Citations (Scopus)

Abstract

We investigate the response of multi-layer epitaxial graphene and chemical vapor deposition (CVD)-grown single-layer graphene to strong terahertz (THz) fields. Contrary to theoretical predictions of strong nonlinear response, the transmitted fields exhibit no harmonic generation, indicating that the nonlinear response is limited by fast electron thermalization due to carrier-carrier scattering. The fast electron heating gives rise to large THz transmission enhancement (> 15%) in single-layer CVD graphene at high THz fields (E _THz > 10 kV cm^-1). The nonlinear effects exhibit non-Drude behavior in the THz conductivity, where THz fields induce extreme non-equilibrium electron distributions.

Original language	English
Article number	085019
Journal	New Journal of Physics
Volume	15
DOIs	https://doi.org/10.1088/1367-2630/15/8/085019
Publication status	Published - 2013 Aug

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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title = "High-field terahertz response of graphene",

abstract = "We investigate the response of multi-layer epitaxial graphene and chemical vapor deposition (CVD)-grown single-layer graphene to strong terahertz (THz) fields. Contrary to theoretical predictions of strong nonlinear response, the transmitted fields exhibit no harmonic generation, indicating that the nonlinear response is limited by fast electron thermalization due to carrier-carrier scattering. The fast electron heating gives rise to large THz transmission enhancement (> 15%) in single-layer CVD graphene at high THz fields (E THz > 10 kV cm-1). The nonlinear effects exhibit non-Drude behavior in the THz conductivity, where THz fields induce extreme non-equilibrium electron distributions.",

author = "Paul, {M. J.} and Chang, {Y. C.} and Thompson, {Z. J.} and A. Stickel and J. Wardini and H. Choi and Minot, {E. D.} and Norris, {T. B.} and Lee, {Yun Shik}",

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AU - Paul, M. J.

AU - Chang, Y. C.

AU - Thompson, Z. J.

AU - Stickel, A.

AU - Wardini, J.

AU - Choi, H.

AU - Minot, E. D.

AU - Norris, T. B.

AU - Lee, Yun Shik

PY - 2013/8

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N2 - We investigate the response of multi-layer epitaxial graphene and chemical vapor deposition (CVD)-grown single-layer graphene to strong terahertz (THz) fields. Contrary to theoretical predictions of strong nonlinear response, the transmitted fields exhibit no harmonic generation, indicating that the nonlinear response is limited by fast electron thermalization due to carrier-carrier scattering. The fast electron heating gives rise to large THz transmission enhancement (> 15%) in single-layer CVD graphene at high THz fields (E THz > 10 kV cm-1). The nonlinear effects exhibit non-Drude behavior in the THz conductivity, where THz fields induce extreme non-equilibrium electron distributions.

AB - We investigate the response of multi-layer epitaxial graphene and chemical vapor deposition (CVD)-grown single-layer graphene to strong terahertz (THz) fields. Contrary to theoretical predictions of strong nonlinear response, the transmitted fields exhibit no harmonic generation, indicating that the nonlinear response is limited by fast electron thermalization due to carrier-carrier scattering. The fast electron heating gives rise to large THz transmission enhancement (> 15%) in single-layer CVD graphene at high THz fields (E THz > 10 kV cm-1). The nonlinear effects exhibit non-Drude behavior in the THz conductivity, where THz fields induce extreme non-equilibrium electron distributions.

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High-field terahertz response of graphene

Abstract

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