In this paper, we provide a comprehensive review of unidirectional reflectionless light
propagation in photonic devices at exceptional points (EPs). EPs, which are branch point …

Metasurfaces, benefiting from the flexibility in engineering the resonance, near-field,
symmetry, and scattering properties of individual building blocks, are promising not only for …

Bianisotropy is common in electromagnetism whenever a cross-coupling between electric
and magnetic responses exists. However, the analogous concept for elastic waves in solids …

Physicists are always riveted in predicting how a physical system behaves as a function of
time. We begin this review article by understanding various formalisms to study the …

Impurities usually play an important role in modifying the bulk properties of electronic or
electromagnetic materials. In this work, we demonstrate a way to break this discipline and …

We design a non-parity-time-symmetric plasmonic waveguide-cavity system, consisting of
two metal-dielectric-metal stub resonators side coupled to a metal-dielectric-metal …

We present a novel paradigm for dispersion engineering in coupled transmission lines
(CTLs) based on exceptional points of degeneracy (EPDs). We also develop a theory for …

Symmetry plays fundamental role in physics and the nature of symmetry changes in non-
Hermitian physics. Here the symmetry-protected scattering in non-Hermitian linear systems …

We present a transmission line theory of exceptional points of degeneracy (EPD) in coupled-
mode guiding structures, ie, a theory that illustrates the characteristics of coupled …

We investigate a unique type of zero-index medium with both gain and loss (ZIMGL), whose
effective permittivity and permeability are both purely imaginary but of opposite signs. We …