Schematic of the experimental configuration at the sample position to generate and detect THz third harmonic generation. (IMAGE)

University of Ottawa

Schematic of the experimental configuration at the sample position to generate and detect THz third harmonic generation.

Caption

A LPF transmits a multicycle fundamental pulse at ω, which produces a signal at 3ω after nonlinear interactions in a graphene-based sample. The LPF and HPF consist of a superposition of four metasurfaces, but two only are schematically shown here for clarity. The graphene sheet is attached to electrodes (top and bottom), functioning as source and drain terminals for electrical characterization. Gating is facilitated by a polymer electrolyte [LiClO4-Polyethylene oxide (PEO)] layer deposited on top of the graphene sample

Credit

Light: Science & Applications (Light Sci Appl)

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