A laser frequency comb is a broad spectrum composed of equidistant narrow lines. Initially
invented for frequency metrology, such combs enable new approaches to spectroscopy over …

We give a brief review of the developments in terahertz time-domain spectroscopy (THz-
TDS) systems and micro-cavity components for probing samples in the University of …

We review the most recent technological and application advances of quantum cascade
lasers, underlining the present milestones and future directions from the Mid-infrared to the …

Terahertz light can be used to identify numerous complex molecules, but has traditionally
remained unexploited due to the lack of powerful broadband sources. Pulsed lasers can be …

Recently, much attention has been focused on the generation of optical frequency combs
from quantum cascade lasers. We discuss how fast detectors can be used to demonstrate …

Terahertz quantum cascade laser (QCL) sources based on intra-cavity difference frequency
generation are currently the only electrically pumped monolithic semiconductor light sources …

Recently, the field of optical frequency combs experienced a major development of new
sources. They are generally much smaller in size (on the scale of millimetres) and can …

Photonic integrated circuits have benefited many fields in the natural sciences. Their
nanoscale patterning has led to the discovery of novel sources and detectors from ultraviolet …

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 …

Quantum cascade lasers are compact devices based on mature compound semiconductors
such as GaAs that take advantage of highly developed optoelectronic fabrication techniques …