A tunable terahertz filter and its switching properties in terahertz region based on a defect mode of a metallic photonic crystal
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Articles you may be interested in Passband filters for terahertz radiation based on dual metallic photonic structures Appl. One-dimensional tunable photonic crystals with spin crossover material for the terahertz range Thermally tunable filter for terahertz range based on a one-dimensional photonic crystal with a defect Calculated and measured transmittance of a tunable metallic photonic crystal filter for terahertz frequencies Appl. We theoretically investigate and discuss an electrically tunable terahertz filter design and its optical switching properties based on the defect mode of a woodpile metallic photonic crystal (MPC). The model filter design is based on a dual use of an MPC as a resonator and as electrodes with a liquid crystal used as a defect layer. The static and the dynamic responses of a realistic liquid crystal are obtained using the Oseen–Frank elastic continuum theory, and the corresponding transmission spectra are calculated using an analytic modal expansion method combined with a transfer-matrix method. The tuning range of f ¼ 1.430$1.577 THz and the order of milliseconds switching property are observed in our design.
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تاریخ انتشار 2014