Exceptional Points in All-Dielectric Structure with Only In-Plane Symmetry Breaking

All-dielectric non-Hermitian structures make it possible to obtain unique effect like the appearance of the exceptional points (EP). A system at EP is sensitive to a small perturbation of refractive index, which can be widely used in different ways, such as EP-based sensors, optical amplifiers, laser gyroscopes and other fields. In this study, we investigate an exceptional point in two-rectangle system with varying opening angle which can be defined as a structure with only in-plane symmetry breaking. Furthermore, the effect dependance of geometry parameters has been studied. The main advantage of our geometric approach is the simplified way to experimental control an EP. Consequently, this effect has the potential to significantly simplify the manufacturing process of photonic devices with diverse functionalities.