Omnidirectional photonic band gaps enlarged by 1D plasma photonic crystals with quasi-periodic structures

An omnidirectional photonic band gap (OPBG) in one-dimensional (1D) plasma photonic crystals (plasma-PCs) with fractal quasi-periodic structures, which are consisting of plasma and two isotropic dielectrics is theoretically calculated by the transfer matrix method (TMM). Compared to the Bragg gaps, the OPBG is not dependent on the angle of incidence and both transverse electric (TE) and transverse magnetic (TM) modes. The calculated results demonstrate that the 1D plasma-PCs with fractal quasi-periodic not only can obtain a larger bandwidth of OPBG but also have a shorter length in realizing devices.