Quantum cascade lasers (QCLs) are high-power sources of coherent radiation in the
midinfrared and terahertz (THz) bands. Laser feedback interferometry (LFI) is one of the …

Early detection of skin pathologies with current clinical diagnostic tools is challenging,
particularly when there are no visible colour changes or morphological cues present on the …

We report a coherent terahertz (THz) imaging system that utilises a quantum cascade laser
(QCL) operating in pulsed-mode as both the source and detector. The realisation of a short …

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 …

The typical modal characteristics arising during laser feedback interferometry (LFI) in multi-
mode terahertz (THz) quantum cascade lasers (QCLs) are investigated in this work. To this …

Exploring nanoscale material properties through light-matter interactions is essential to
unveil new phenomena and manipulate materials at the atomic level, paving the way for …

We report on real-time gas sensing with a terahertz quantum-cascade laser (QCL). The
method is solely based on the modulation of the external cavity length, exploiting the …

A new self-mixing interferometry quadrature demodulation method based on a lock-in
amplifier technique is proposed. Sinusoidal phase modulation of the beam is obtained by an …

The phase-locking, noise, and modulation properties of two face-to-face optically mutual-
injected terahertz (THz) quantum cascade lasers (QCLs) are analyzed theoretically. In the …

A tunable dual-color KTP terahertz (THz) wave parametric oscillator (TPO) pumped by a
dual-wavelength laser was proposed in this Letter. Theoretical analysis denotes that the …