Terahertz wave switch based on photonic crystal ring resonators |
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Authors: | A R Maleki Javan N Granpayeh |
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Institution: | (1) Faculty of Electrical Engineering, K. N. Toosi University of Technology, Tehran, 1431714191, Iran |
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Abstract: | In this paper, we have presented a compact and integrated terahertz wave switch design based on photonic crystal ring resonators.
The photonic crystal structure with square lattice is investigated and applied for design of ring resonators. The switching
mechanism of this novel switch is based on the variation of the resonant frequency of the ring resonator inserted between
two parallel waveguides. The refractive index of the holes of the structure filled with polyaniline electrorheological fluids
are varied by applied external electric field, the result of which is the variation of the ring resonant frequency. The proposed
device is analyzed by using finite difference time domain method. Numerical simulation results show that this switch has high
extinction ratio, small size, low voltage and advantages of selectivity of coupling THz wave to different output ports. |
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Keywords: | Photonic crystals Ring resonators Terahertz wave switch Electrorheological fluids |
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