We proposed a simple scheme to manipulate the position of the reflected terahertz wave beam based on the prism/liquid
crystal structure. Both the stationary-phase method and finite element method are used to analyze and simulate the
characteristics of the proposed device. To give comprehensive understanding, the position of the reflected terahertz wave
beam is verified in simulation by using the COMSOL Multiphysics software. Numerical calculation results show that the
proposed terahertz wave switch a high extinction ratio (35dB for TE polarization and 30dB for TM polarization). This
provides an attractive way for creating a simple structure and compact size terahertz wave switch with acceptable
extinction ratio.
We propose a scheme to manipulate the Goos-Hänchen shift of a terahertz wave reflected from the prism/magnetic dielectric. By adjusting the external applied magnetic field, the refractive index of the magnetic dielectric can be changed, so the Goos-Hänchen lateral shift is dynamically tuned. Numerical calculation results further indicate that the proposed configuration has the potential application for the integrated terahertz wave switch with the extinction ratio of 18.5dB at terahertz wave wireless communication frequency of 0.857THz.
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