Robust Photonic Bandgaps in Quasiperiodic and Random Extrinsic Magnetized Plasma

In this paper, we have employed the transfer-matrix method to study theoretically the light waves propagation in extrinsic magnetized plasma multilayer, which is composed of a bulk plasma system influenced by the presence of spatially varying external magnetic field, which leads to a photonic bandgap device. The multilayered structures are arranged in periodic, quasiperiodic (Fibonacci, Octonacci, Thue-Morse, and double period), and Gaussian random fashions. The numerical results show the emergence of two main photonic bandgaps: the first gap for low frequencies and the second one for higher frequencies. We investigate the robust nature of the higher frequencies bandgap since it shows up to be invariant to different values of applied external magnetic fields and electron density as well as changes in the position and thickness of the layers introduced by the quasiperiodic and the Gaussian random sequences, respectively. The most surprising result is that this desired robust bandgap is broadening without any intermediate resonant peaks while the randomness in the layer thickness is introduced, which had not been observed in previous works about this same system.