Terahertz band pass filter design using multilayer metamaterials

摘要

In this paper, a bandpass terahertz filter based on multilayer metamaterials is proposed, designed and simulated numerically. To do this idea, first of all, the functional behavior (filtering property) of the bilayer metasurface is investigated considering a single bilayer-cylinder as a unit cell in the periodic system. Then, we show that by increasing the number of cylinders as basic elements in the unit cell, the bandwidth will increase. Also, the center frequency is tunable through changes in the dimension of the basic element. The main advantages of the proposed structure that can be used to realize terahertz filters are wideband, tunable, and easy to build. It is shown that the bandwidth of the proposed bandpass filter is about 1 THz and the amount of transmittance is close to 93%.