Photonic memory devices are capable of giving different outputs for the same present input,
judging from the input's past values and, in this way,“remembering” what happened the …

The emergence of exceptional point (EP) and its divergent form, so-called divergent EP
(DEP), in parity-time (PT)-symmetric trimer opens a new pathway for making radio frequency …

The recently developed concept of time-varying metamaterials paves the way for advanced
methods of electromagnetic property modulation, such as magnet-free isolators, frequency …

Gain is a blessing and a curse for photonic designs; indeed, gain-based devices may
become unprecedentedly efficient but, on the other hand, the local electromagnetic fields …

PT-symmetric quantum theory was originally proposed with the aim of extending standard
quantum theory by relaxing the Hermiticity constraint on Hamiltonians. However, no such …

Constitutive relations for Lorentz media with a time-varying density of oscillators and a time-
varying intrinsic frequency of oscillators are derived ab initio. For an electromagnetic wave …

Resonant electromagnetic scattering has been optimized for angularly inhomogeneous
nanotubes characterized by different surface admittances along the two complementary …

Collecting energy from the time-dependent electrodynamic fields into a vacuum volume can
be substantially assisted by spherical metasurfaces wrapped around the respective …

Adding active components to a photonic device may dramatically enrich and improve its
performance but, at the same time, creates the risk of instability, namely, occurrence of …

Nanotubes with proper thickness, size, and texture make ultra-efficient sinks for quantum
particles traveling into specific background media. Several optimal semiconducting …