Tunability of photonic crystals based on the Faraday effect

We show theoretically that the photonic band structures of photonic crystals (PhCs) with constituent materials containing free carriers can be tuned by an external magnetic field in the frequency range below the far infrared region. We take one-dimensional PhCs consisting of an intrinsic InSb layer and an air layer stacked alternately as an example in studying photonic band structures and transmissive properties within the magnetic field.