Planar terahertz functional materials based on metallic array structures

The planar terahertz functional materials based on the metallic array structures are studied in this work. The planar metallic structures consist of periodic array with the different structures of unit cell. The spectral feature of metallic array structures is investigated by the terahertz time-domain spectroscopy. The terahertz functionality of these metallic structures is presented and discussed. In detail, the one-dimensional metallic wire grating as a potential terahertz polarizer is designed and fabricated. The terahertz time-domain spectroscopy is used to measure the transmission of metallic grating. Moreover, two-dimensional metallic slit array as a potential terahertz attenuator is designed and analyzed. The polarization dependence of metallic slit array is discussed. Finally, the metallic cross array as a potential terahertz filter is analyzed. The optimized design of structure parameters of metallic arrays is simulated and discussed.