The combination of materials with targeted optical properties and of complex, 3D
architectures, which can be nowadays obtained by additive manufacturing, opens …

Even though already in the seventies, right after the invention of the quantum cascade laser
(QCL) concept, it was argued that this device could be operated in the THz (far-infrared) …

One of the most exciting breakthroughs in physics is the concept of topology that was
recently introduced to photonics, achieving robust functionalities, as manifested in the …

Strong coupling is a distinct light–matter interaction regime, in which the interaction is
manifested in coherent oscillations of energy between matter and a photonic subsystem …

A terahertz (THz) quantum cascade laser (QCL) is an electrically pumped semiconductor
laser based on the inter‐subband electron transitions in a multiple‐quantum‐well …

A parabolic potential that confines charge carriers along the growth direction of quantum
wells semiconductor systems is characterized by a single resonance frequency, associated …

Since the days of Hertz, radio transmitters have evolved from rudimentary circuits emitting
around 50 MHz to modern ubiquitous Wi-Fi devices operating at gigahertz radio bands. As …

As the field of terahertz (THz) photonics advances, we present a monolithic gallium arsenide
(GaAs) disk-shaped whispering gallery mode resonator that has potential as a component in …

We report a terahertz quantum-cascade vertical-external-cavity surface-emitting laser (QC-
VECSEL) based upon a metasurface consisting of an array of gain-loaded resonant patch …

Terahertz (THz) microcavities have garnered considerable attention for their ability to
localize and confine THz waves, allowing for strong coupling to remarkably enhance the …