Exceptional points are spectral singularities in non-Hermitian systems at which two or more
eigenvalues and their corresponding eigenvectors simultaneously coalesce. Originating …

This tutorial provides an intuitive and concrete description of the phenomena of
electromagnetic nonreciprocity that will be useful for readers with engineering or physics …

Chirality is one of the fundamentals of nature with strong ties to asymmetry. In wave physics,
it is conventionally characterized by asymmetric scattering of circularly polarized waves but …

Exceptional point (EP) is a special degeneracy of non-Hermitian systems. One-dimensional
transmission systems operating at EPs are widely studied and applied to chiral conversion …

We study the Mie-like scattering from an open subwavelength resonator made of a high-
index dielectric material, when its parameters are tuned to the regime of interfering …

We identify a new kind of physically realizable exceptional point (EP) corresponding to
degenerate coherent perfect absorption, in which two purely incoming solutions of the wave …

Exceptional points (EPs) appear as degeneracies in the spectrum of non-Hermitian matrices
at which the eigenvectors coalesce. In general, an EP of order n may find room to emerge if …

Symmetry plays a fundamentally important role in physics. In this work, we find a
conservation law, S†(H c†) S (H c)= I, which is valid for any non-Hermitian scattering center …

Loss in photonic devices is intentionally minimized, as it limits the efficiency and potential
functionalities. Here, we report a loss-assisted non-Hermitian electromagnetic metasurface …

Dynamically encircling the exceptional point (EP) of an anti‐parity‐time (anti‐PT) symmetric
system can achieve chiral mode switching between symmetry‐broken eigenmodes, which is …