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We demonstrate electrical control of terahertz radiation through nanoresonators on VO2 thin film. By electrically induced insulator-to-metal phase transition, terahertz radiation can be switched-off. Transmission is decreased by one order of magnitude even when the film thickness is in nanoscale.
We study log periodic nanoresonators on VO2 thin film, amplifying available dynamic range for extinction and transmission. Over 1,000:1 extinction ratio for the nano-pattern is achieved when the film undergoes insulator-to-metal phase transition, compared with 10:1 ratio for the unpatterned cases.
We present resonant transmission through rectangular hole array on a metallic film. Transmission spectra broaden with the resonance peaks shifting toward higher frequencies, as the period decreases. The broadening is caused by inter-resonator coupling effects similar to the tight binding model.
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