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) …

Terahertz (THz) quantum cascade laser (QCL) is an electrically pumped unipolar photonic
device in which light emission takes place due to electronic transitions between subbands …

A continuous 4–32 THz emission spectrum of organic crystal DAST is obtained through a
widely tunable quasi-monochromatic terahertz source and sensitive up-conversion …

Photonic engineering of the terahertz emission from a quantum cascade laser (QCL) is
fundamental for the exploitation of this unique source in a myriad of applications where it …

We report all-electronic coherent scattering-type scanning near-field microscopy (s-SNOM)
using a terahertz-frequency quantum cascade laser. By exploiting the coherent self-mixing …

Terahertz (THz) external-cavity lasers based on quantum-cascade (QC) metasurfaces are
emerging as widely-tunable, single-mode sources with the potential to cover the 1--6 THz …

The quantum cascade laser is a powerful solid-state source of terahertz-frequency radiation.
However, integrating multiple photonic functions into a monolithic platform in this frequency …

The possibility of realizing single-mode emission in quantum-cascade lasers due to
modulation of output optical losses in a Fabry–Perot cavity is demonstrated. For the active …

The Vernier effect and harmonic Vernier effect have attracted ever-increasing interest due to
their freely tailored spectrum envelope in tunable laser, modulator, and precision sensing …

We introduce a 3-level rate equation approach to modelling a rate equation model for the
dynamics of quantum cascade (QCLs) lasers that is based on cascaded active regions. We …