Transmission Properties in Plasma Photonic Crystal Controlled by Magnetic Fields

The transmission properties in two-dimensional plasma photonic crystal composed of and yttrium–iron–garnet rods with square lattices are demonstrated under different electron densities external magnetic fields. TE TM modes respond to the permittivity tensor permeability produced by field. For polarization, two distinct attenuation peaks appear ranges 3.4–3.62 GHz 3.78–4 GHz, induced fields, location these can be modulated modifying densities. a flat spectrum was obtained range 4–4.6 dB increasing density 3×1012 cm−3. Then, Y-shaped waveguide is designed. path changing direction By regulating density, switching on off achieved.