The exotic physics emerging in non-Hermitian systems with balanced distributions of gain
and loss has recently drawn a great deal of attention. These systems exhibit phase …

Leveraging topological properties in the response of electromagnetic systems can greatly
enhance their potential. Although the investigation of singularity‐based electromagnetics …

We report the realization of a coherent perfect absorber, using a pair of passive resonators
coupled to a microwave transmission line in the background, which can completely absorb …

Classical systems containing cleverly devised combinations of loss and gain elements
constitute extremely rich building units that can mimic non-Hermitian properties, which …

Using a scattering matrix formalism, we derive the general scattering properties of optical
structures that are symmetric under a combination of parity and time reversal (PT). We …

We show both theoretically and experimentally that a pair of inductively coupled active LRC
circuits (dimer), one with amplification and another with an equivalent amount of attenuation …

The establishment of non-Hermitian quantum mechanics (such as parity–time (PT)
symmetry) stimulates a paradigmatic shift for studying symmetries of complex potentials …

The observation that PT-symmetric Hamiltonians can have real-valued energy levels even if
they are non-Hermitian has triggered intense activities, with experiments, in particular …

Over the last two decades, advances in fabrication have led to significant progress in
creating patterned heterostructures that support either carriers, such as electrons or holes …

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 …