A passive parity-time (PT) symmetric medium provides a feasible scheme to experimentally
investigate non-Hermitian systems. We experimentally demonstrate an acoustic asymmetric …

Nonreciprocal transmission forms the basic operation mechanism of optical diodes and
isolators and requires the tantalizing task of breaking the Lorentz reciprocity law. In this …

Optical structures with balanced loss and gain provide an efficient platform to study the
features of light propagation under non-Hermitian parity-time symmetry. Here, we report a …

We propose a scheme to achieve a controllable unidirectional reflectionless propagation at
exceptional point (EP) in a non-ideal parity-time metasurface consisting of two silver ring …

In this work we theoretically study the exceptional points and reflection spectra
characteristics of a grating coupled metal-insulator-metal heterostructure, which is a non …

Unidirectional reflectionless propagation in a non-Hermitian metamaterial is obtained based
on phase coupling between two resonators. The unidirectional reflectionless propagation …

A scheme on unidirectional reflectionless propagation is theoretically investigated in a
plasmonic waveguide system which consists of two metal-insulator-metal (MIM) stub …

Parity-time (PT) symmetric Bragg gratings (PTBGs) possess unique features compared to
traditional ones. For example, the photonic bandgap of a PTBG can be modified and even …

Optical systems following concepts of parity-time (PT) symmetry have attracted significant
attention because of their extraordinary behavior such as unidirectional reflectance or power …

The scattering of quantum particles by non-Hermitian (generally non-local) potentials in one
dimension may result in asymmetric transmission and/or reflection from left and right …