Near Field Optical-Pump-Terahertz-Probe Experiments on Graphene/InAs Heterostructure

ORAL

Abstract

We show that graphene is a perfect terahertz reflector in the high q regime with terahertz s-SNOM. We also demonstrate optical pump terahertz near-field probe (n-OPTP) and optical pump terahertz near field emission (n-OPTE) experiments on graphene/InAs heterostructure. Femtosecond pulse laser is used to both pump samples and to generate terahertz pulses. We show that in the near-field regime a single layer graphene is transparent to near-IR (800 nm) optical excitated terahertz emission from InAs but completely “screens” the photo-induced carrier dynamics in InAs probed by a seperate THz pulse.

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Presenters

  • Jiawei Zhang

    • Stony Brook University

Authors

  • Ziheng Yao

    • Stony Brook University

  • Jiawei Zhang

    • Stony Brook University

  • Scott Mills

    • Stony Brook University

  • XIAOGUANG ZHAO

    • Boston University

  • Xinzhong Chen

    • Stony Brook University

  • ryan mescall

    • Stony Brook University

  • Vyacheslav Semenenko

    • Skolkovo Institute of Science and Technology

  • Hai Hu

    • Nanophotonics Research Division, National Center for Nanoscience and Technology

  • Thomas P Ciavatti

    • Stony Brook University

  • Stephan March

    • Electrical and Computer Engineering, The University of Texas at Austin

  • Seth Bank

    • Electrical and Computer Engineering, University of Texas at Austin
    • Electrical and Computer Engineering, The University of Texas at Austin

  • Hu Tao

    • Shanghai Institute of Microsystem and Information Technology, State Key Laboratory of Transducer Technology

  • Vasili Perebeinos

    • Skolkovo Institute of Science and Technology

  • Xin Zhang

    • Boston University
    • department of mechanical engineering, boston university

  • Qing Dai

    • Nanophotonics Research Division, National Center for Nanoscience and Technology

  • Xu Du

    • Stony Brook University

  • Mengku Liu

    • Stony Brook University