This tutorial presents a guided tour of laser feedback interferometry, from its origin and early
development through its implementation to a slew of sensing applications, including …

The terahertz (THz) frequency quantum cascade laser (QCL) is a compact source of THz
radiation offering high power, high spectral purity and moderate tunability. As such, these …

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 …

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 …

Chip‐scale, electrically‐pumped terahertz (THz) frequency‐combs (FCs) rely on nonlinear
four‐wave‐mixing processes, and have a nontrivial phase relationship between the evenly …

Terahertz quantum cascade lasers with a record output power up to∼ 0.23 W in continuous
wave mode were obtained. We show that the optimal 2.9-mm-long device operating at 3.11 …

We present a directly generated on-chip dual-comb source at terahertz (THz) frequencies.
The multi-heterodyne beating signal of two free-running THz quantum cascade laser …

Self-mixing laser sensors show promise for a wide range of sensing applications, including
displacement, velocimetry, and fluid flow measurements. Several techniques have been …

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 …

Near-field microscopy techniques operating in the terahertz (THz) frequency band offer the
tantalizing possibility of visualizing with nanometric resolution the localized THz fields …