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We demonstrate the performance enhancement of field-effect transistor (FET)-based plasmonic terahertz (THz) detector with monolithic integrated antenna in low-impedance regime and report the experimental results of Si MOSFET impedance in THz regime using 0.2-THz measurement system. By designing FET with low-impedance ranges (<1 k$\Omega )$ and integrating antennas with impedances of 50 and $100~\Omega $ ...
A graphene-based archimedean spiral antenna is numerically studied. The input impedance and the radiation properties of such antenna are investigated through full-wave numerical simulations. Simulations show that the proposed structure allows frequency reconfiguration as well as appropriate radiation resistance to diminish the mismatch between antenna and photomixer. It is also shown that the total...
A novel broadband technique to effectively launch plasmons along a single graphene layer at terahertz (THz) frequencies is proposed. To this end, the coupling of the electromagnetic wave from a readily available plasmonic waveguide established by a periodically corrugated metallic surface to the graphene sheet is proposed. As will be shown, this technique can significantly surmount the need for efficient...
A dipole-like antenna made of graphene strips and integrated with a THz photonic mixer is studied numerically. The input impedance and the radiation properties of such graphene-based antenna are investigated through full-wave numerical simulations. Full-wave simulations show that the graphene-based antennas can provide higher input impedance along with the tunability of the resonance frequency; however,...
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