In this roadmap article, we have focused on the most recent advances in terahertz (THz)
imaging with particular attention paid to the optimization and miniaturization of the THz …

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 …

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 …

A semiconductor injection laser that differs in a fundamental way from diode lasers has been
demonstrated. It is built out of quantum semiconductor structures that were grown by …

In the last decade quantum cascade lasers (QCLs) have become the most widely used
source of mid-infrared radiation, finding large scale applications because of their wide …

Terahertz waves, which lie in the frequency range of 0.1-10 THz, have long been
investigated in a few limited fields, such as astronomy, because of a lack of devices for their …

New and emerging terahertz technology applications make this a very exciting time for the
scientists, engineers, and technologists in the field. New sensors and detectors have been …

One of the most exciting breakthroughs in physics is the concept of topology that was
recently introduced to photonics, achieving robust functionalities, as manifested in the …

Surface plasmons have found a broad range of applications in photonic devices at visible
and near-infrared wavelengths. In contrast, longer-wavelength surface electromagnetic …