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

• Published in: Results in optics 2024-02, Vol.14, p.100594, Article 100594
• Main Authors: Kwefeu Mbakop, Fabrice, Zieba Falama, Ruben, Wu, Feng, Ayang, Albert, Ndjakomo Essiane, Salome, Leontie, Liviu, Djongyang, Noel, Iacomi, Felicia
• Format: Article
• Language: English
• Subjects: Angular Dependence; Bloch Theorem; Dispersion; Omnidirectional Reflection; Thermophotovoltaic; Transfer Matrix Method
• ISSN: 2666-9501; 2666-9501
• DOI: 10.1016/j.rio.2023.100594

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.