Properties of mid-infrared interface modes at the interface of two isotropic dielectric photonic crystals

In the present manuscript, theoretical investigation of interface modes at the interface of two isotropic dielectric photonic crystals is performed. For both transverse electric (sigma - polarized waves) and transverse magnetic (pi - polarized waves) cases dispersive properties such as dispersion curve, photonic band gap (PBG) shrinking - optical holes and Brewster points are discussed. For the case of sigma - polarized waves, interface modes are exhibited which are of prime importance in the present analysis. It is shown that for pi - polarized waves only DD (decaying-decaying) and DE (decaying-extending) type interface modes exist. On the other hand, for the case of pi - polarized waves only EE (extending- extending) type interface modes exist which is completely transmitted through the photonic structure. Therefore, depending on the properties of the chosen materials, such photonic structure can seek different applications in the design of sensors, optical filters, optical switches, etc. and it is also suitable to explore the electromagnetic (EM) behaviour at the interface of various media.

Automated summary

This paper presents a theoretical investigation of interface modes at the interface of two isotropic dielectric photonic crystals. The dispersive properties for both sigma - polarized waves and pi - polarized waves are discussed, including dispersion curve, photonic band gap (PBG) shrinking - optical holes, and Brewster points. It is shown that interface modes are of prime importance for sigma - polarized waves, while only DD and DE type interface modes exist for pi - polarized waves. Additionally, only EE type interface modes exist for pi - polarized waves, which are completely transmitted through the photonic structure. Therefore, depending on the properties of the chosen materials, this photonic structure can have various applications in sensor design, optical filters, optical switches, etc., and is suitable for exploring the electromagnetic behavior at the interface of different media.