Non-Hermitian theory is a theoretical framework used to describe open systems. It offers a
powerful tool in the characterization of both the intrinsic degrees of freedom of a system and …

Non-Hermitian optics is a burgeoning field at the intersection of quantum physics,
electrodynamics, and nanophotonics. It provides a new perspective of the role of gain and …

Optical sensors, crucial in diverse fields like gravitational wave detection, biomedical
imaging, and structural health monitoring, rely on optical phase to convey valuable …

The on-chip integrated visible microlaser is a core unit of high-speed visible-light
communication with huge bandwidth resources, which needs robustness against fabrication …

Strong interactions between magnetic materials and electrodynamic cavities mix together
spin and photon properties, producing unique hybridized behavior. The study of such …

Non‐Hermitian (NH) physics describes novel phenomena in open systems that allow
generally complex spectra. Introducing NH physics into topological metamaterials, which …

Recently, non-Hermitian Hamiltonians have gained a lot of interest, especially in optics and
electronics. In particular, the existence of real eigenvalues of non-Hermitian systems has …

Exceptional points (EPs) are singularities in non-Hermitian systems, where k (k≥ 2)
eigenvalues and eigenstates coalesce. High-order EPs exhibit richer topological …

Exceptional points are degeneracies in the spectrum of non-Hermitian open systems where
at least two eigenfrequencies and simultaneously the corresponding eigenstates of the …

The intriguing and anomalous optical characteristics of exceptional points (EPs) in optical
resonators have attracted significant attention. While EP-related phenomena have been …