Optimizing Broadband Terahertz Modulation with Hybrid Graphene/Metasurface Structures

ORAL

Abstract

We demonstrate efficient terahertz (THz) modulation by coupling graphene strongly with a broadband THz metasurface device. ~This THz metasurface, made of periodic gold slit arrays, shows near unity broadband transmission that arises from coherent radiation of the enhanced local-field in the slits. Utilizing graphene as an active load with tunable conductivity, we can significantly modify the local-field enhancement and strongly modulate the THz wave transmission. This hybrid device also provides a new platform for possible nonlinear THz spectroscopy study of graphene.

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Authors

  • Su-Fei Shi

    • UC Berkeley
    • Univ of California - Berkeley

  • Bo Zeng

    • UC Berkeley

  • Hui-Ling Han

    • UC Berkeley

  • Xiaoping Hong

    • UC Berkeley

  • Hsin-Zon Tsai

    • UC Berkeley

  • Hae Sae

    • Uc Berkeley

  • Alex Zettl

    • Uc Berkeley

  • Mike Crommie

    • UC Berkeley

  • Feng Wang

    • UC Berkeley