Over the past decade, the demonstration of frequency combs has been reported in a wide
range of quantum cascade lasers. These combs have huge potential in applications …

In this review, we discuss the rich ultrafast response at terahertz (THz) frequencies of two-
dimensional (2D) materials. Thanks to their unique optoelectronic properties and …

The extension of dual-comb spectroscopy (DCS) to all wavelengths of light along with its
ability to provide ultra-large dynamic range and ultra-high spectral resolution, renders it …

Frequency‐modulated (FM) combs feature flat intensity spectra with a linear frequency chirp,
useful for metrology and sensing applications. Generating FM combs in semiconductor …

Assessing the nature of topological quantum materials, and in particular probing the
existence of topological surface states, is a very challenging task. Terahertz (THz) frequency …

Mode locking, the self‐starting synchronous oscillation of electromagnetic modes in a laser
cavity, is the primary way to generate ultrashort light pulses. In random lasers, without a …

This study investigates the interaction between frequency combs and optical feedback
effects in Quantum Cascade Lasers (QCLs). The theoretical analysis reveals new …

THz quantum cascade lasers (QCLs) based on double metal waveguides feature
broadband and high-temperature devices for their use in spectroscopy and sensing …

Harmonic generation is a result of a strong non-linear interaction between light and matter. It
is a key technology for optics, as it allows the conversion of optical signals to higher …

We demonstrate the implementation of external cavity optical feedback to improve
coherence and promote generation of harmonic states by a mid-infrared quantum cascade …