Angular dependence of photonic band gap and omni-directional reflection in one-dimensional photonic crystal applied to a thermophotovoltaic device

In this work, we present a theoretical study and a numerical simulation on omnidirectional reflection in one-dimensional photonic crystal structures for a thermophotovoltaic device. The optical properties are determined using the transfer matrix method. The results show that the angular dependence of photonic bandgaps depends on refractive index contrast and, polarization. However, for both TE and TM polarization, a reflectivity peak with 100% reflectivity is observed. The Te/SiO₂ structure is the one with the largest bandwidth of omnidirectional photonic band gap compared with the TiO₂/SiO₂ and Si/SiO₂ structures. The results also show that by designing a giant birefringent optical the Brewster's angle allows angle the control at any angle for both TE and TM mode.