Abstract 2D optics is gradually emerging as a frontier in modern optics. Plasmons in
graphene provide a prominent platform for 2D optics in which the light is squeezed into …

We introduce here a parity-time-(PT) symmetric system using an optically pumped, active
graphene metasurface paired with a resistive metallic filament, realizing a unidirectional …

We investigate here active metasurfaces obeying parity–time (PT) symmetry and their
sensing applications, taking advantage of singularities unique to non-Hermitian systems …

We develop an analytically solvable classical kinetic model of spatially dispersive transport
in Dirac materials accounting for strong electron-electron (ee) and electron-hole (eh) …

Achieving exact balance between spatially separated gain and loss is generally regarded as
a necessary condition for parity-time-(PT-) symmetric optical systems. We introduce …

The efficient amplification and lasing of electromagnetic radiation at terahertz (THz)
frequencies is a non-trivial task achieved mainly by quantum cascade laser configurations …

We demonstrate that the injection of the ballistic electrons into the two-dimensional electron
plasma in lateral n+-in-n+ graphene field-effect transistors (GFETs) might lead to a …

We propose and evaluate the heterostructure based on the graphene layer (GL) with the
lateral electron injection from the side contacts and the hole vertical injection via the black …

Collisions between electrons and holes can dominate the carrier scattering in clean
graphene samples in the vicinity of the charge neutrality point. While electron-hole limited …

We develop the model for the terahertz (THz) and infrared (IR) photoconductivity of
graphene layers (GLs) at room temperature. The model accounts for the linear GL energy …