Terahertz quantum cascade laser sources based on intra-cavity difference frequency
generation from mid-IR devices are an important asset for applications in rotational …

We report on a heterogeneous active region design for terahertz quantum cascade laser
based frequency combs. Dynamic range, spectral bandwidth and output power have been …

Broadband, quantum-engineered, quantum cascade lasers (QCLs) are the most powerful
chip-scale sources of optical frequency combs (FCs) across the mid-infrared and the …

In recent years, quantum cascade lasers (QCLs) have shown tremendous potential for the
generation of frequency combs in the mid-infrared and terahertz portions of the …

Quantum cascade lasers combine desirable features, namely high optical power and
compactness, as no other coherent source in the field of THz generation. While their …

A terahertz (THz) frequency comb capable of high-resolution measurement will significantly
advance THz technology application in spectroscopy, metrology and sensing. The recently …

Terahertz sources based on intracavity difference-frequency generation in mid-infrared
quantum cascade lasers (THz DFG-QCLs) have recently emerged as the first monolithic …

We report a homogeneous quantum cascade laser (QCL) emitting at terahertz (THz)
frequencies, with a total spectral emission of about 0.6 THz, centered around 3.3 THz, a …

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 …

Optical frequency combs (OFCs), which establish a rigid phase-coherent link between the
microwave and optical domains of the electromagnetic spectrum, are emerging as key high …