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We investigate the nonlinear plasmonic absorption in graphene ribbons by THz pump-probe spectroscopy. The optical nonlinearity is increased by more than one order of magnitude, which is in excellent agreement with theoretical calculations.
We observe and theoretically study new plasmon resonances in hybrid metalgraphene structures. We demonstrate anomalously high resonant terahertz absorption and transmission in graphene-filled metallic apertures. These tunable plasmon resonances can find applications in terahertz optoelectronics.
We study the response of a graphene photothermoelectric-based detector illuminated by two continuous-wave optical beams. The power and frequency dependence of the photoresponse are used to probe the graphene hot-electron cooling rates and mechanisms.
We experimentally examine anisotropically etched silicon surfaces for terahertz (THz) plasmonic guided wave applications. Highly doped silicon surfaces are anisotropically etched to form a one-dimensional array of subwavelength concave pyramidal troughs. The plasmonic wave guides are found to support highly confined guided modes both in transverse and longitudinal directions. The resonant frequencies...
We report a terahertz waveguide fabricated from doped crystalline silicon. Anisotropic chemically etching is used to produce a periodic array of concave pyramidal troughs in the silicon that provide confinement in both transverse directions.
The temporal response of a broadband, monolayer graphene photodetector based on the photothermoelectric effect is characterized. Pulse-coincidence and impulse response measurements indicate fast photodetection on the timescale of 10 ps.
We experimentally investigated terahertz (THz) plasmonic waveguides on heavily doped silicon surface structured with sub-wavelength pillars. We study the propagation properties of the resonant modes and their dependence on dopant concentration and structural parameters.
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