Exceptional points (EPs) arising in non-Hermitian systems have led to a variety of intriguing
wave phenomena, and have been attracting increased interest in various physical platforms …

BACKGROUND Singularities are critical points for which the behavior of a mathematical
model governing a physical system is of a fundamentally different nature compared to the …

Topological photonics is a rapidly emerging field of research in which geometrical and
topological ideas are exploited to design and control the behavior of light. Drawing …

Rapidly growing demands for fast information processing have launched a race for creating
compact and highly efficient optical devices that can reliably transmit signals without losses …

The topological properties of an object, associated with an integer called the topological
invariant, are global features that cannot change continuously but only through abrupt …

Backscattering suppression in silicon-on-insulator (SOI) is one of the central issues to
reduce energy loss and signal distortion, enabling for capability improvement of modern …

Topological photonics has attracted increasing attention in recent years due to the unique
opportunities it provides to manipulate light in a robust way immune to disorder and defects …

Topological insulators are materials that behave as insulators in the bulk and as conductors
at the edge or surface due to the particular configuration of their bulk band dispersion …

Tailoring light properties using metasurfaces made of optically thin and subwavelength
structure arrays has led to a variety of innovative optical components with intriguing …

Light propagates in various ways depending on environment, including uniform medium,
surface/interface and photonic crystals, which appears ubiquitously in daily life and has …