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 …

Quantum cascade lasers (QCLs) represent the most fascinating achievement of quantum
engineering, showing how artificial materials can be generated through quantum design …

The generation of stable trains of ultrashort (femtosecond to picosecond), terahertz-
frequency radiation pulses with large instantaneous intensities is an underlying requirement …

Miniaturized frequency comb sources across hard-to-access spectral regions, ie mid-and far-
infrared, have long been sought. Four-wave-mixing based Quantum Cascade Laser combs …

The dynamics of semiconductor lasers with fast gain is generally considered to suppress
amplitude modulation, resulting in a frequency‐modulated output. Since their first …

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) …

We present homogeneous quantum cascade lasers (QCLs) emitting around 3 THz which
display bandwidths up to 950 GHz with a single stable beatnote. Devices are spontaneously …

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

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 …

Millimeter wave (mmWave) generation using photonic techniques has so far been limited to
the use of near-infrared lasers that are down-converted to the mmWave region. However …