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High-field terahertz response of graphene

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https://ir.library.oregonstate.edu/concern/articles/000000549

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  • 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.
  • Keywords: Spectroscopy, Generation, Gas, Transistors
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  • Paul, M. J., Chang, Y. C., Thompson, Z. J., Stickel, A., Wardini, J., Choi, H.,... Minot, E. D. (2013). High-field terahertz response of graphene. New Journal of Physics, 15. doi:10.1088/1367-2630/15/8/085019
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  • 15
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  • The work at UM was supported by the NSF-MRSEC through contract DMR-0820382. The OSU work is supported by the National Science Foundation (DMR-1063632) and the National Research Foundation of Korea (NRF-2011-220-D00052). The work at Yonsei was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean government (NRF-2011-220-D00052, no. 2011-0013255).
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