Six years after their birth, terahertz quantum-cascade lasers can now deliver milliwatts or
more of continuous-wave coherent radiation throughout the terahertz range—the spectral …

Terahertz quantum cascade lasers (QCLs) emit radiation due to intersubband optical
transitions in semiconductor superlattices that could be engineered by design. Among a …

Resonant-phonon terahertz quantum-cascade lasers operating up to a heat-sink
temperature of 186 K are demonstrated. This record temperature performance is achieved …

High-power terahertz quantum cascade lasers Page 1 High-power Terahertz Quantum
Cascade Lasers Benjamin S. Williams, Sushil Kumar, and Qing Hu Department of Electrical …

We report the use of a~ 50-mW peak power 4.3-THz quantum cascade laser (QCL) as an
illumination source for real-time imaging with a 320 times 240 element room-temperature …

In this paper we review recent progress in obtaining laser action from semiconductor
quantum cascade structures covering the low THz region of the electromagnetic spectrum …

Several competing technologies continue to advance the field of terahertz science; of
particular importance has been the development of a terahertz semiconductor quantum …

A terahertz quantum cascade laser design that combines a wide gain bandwidth, large
photon-driven transport and good high-temperature characteristics is presented. It relies on …

We develop simple density-matrix models to describe the role of coherence in resonant-
tunneling (RT) transport of quantum-cascade lasers (QCLs). Specifically, we investigate the …

Emission of terahertz (THz) electromagnetic (EM) waves from a high critical temperature (T
c) superconductor intrinsic Josephson junction (IJJ) is a new and promising candidate for …