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- W2783166695 abstract "We theoretically and numerically investigate the extraordinary optical transmission through a terahertz metamaterial composed of metallic ring aperture arrays. The physical mechanism of different transmission peaks is elucidated to be magnetic polaritons or propagation surface plasmons with the help of surface current and electromagnetic field distributions at respective resonance frequencies. Then, we propose a high performance terahertz modulator based on the unique PSP resonance and combined with the metallic ring aperture arrays and a self-gated parallel-plate graphene capacitor. Because, to date, few researches have exhibited gate-controlled graphene modulation in terahertz region with low insertion losses, high modulation depth and low control voltage at room temperature. Here, we propose a 96% amplitude modulation with 0.7 dB insertion losses and ∼5.5 V gate voltage. Besides, we further study the absorption spectra of the modulator. When the transmission of modulator is very low, a 91% absorption can be achieved for avoiding damaging the source devices." @default.
- W2783166695 created "2018-01-26" @default.
- W2783166695 creator A5046597133 @default.
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- W2783166695 date "2018-05-01" @default.
- W2783166695 modified "2023-09-24" @default.
- W2783166695 title "Terahertz modulation based on surface plasmon resonance by self-gated graphene" @default.
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- W2783166695 doi "https://doi.org/10.1016/j.optcom.2017.12.039" @default.
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