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 …

Quantum cascade lasers are unipolar semiconductor lasers covering a wide range of the
infrared and terahertz spectrum. Lasing action is achieved by using optical intersubband …

Science and technologies based on terahertz frequency electromagnetic radiation (100 GHz–
30 THz) have developed rapidly over the last 30 years. For most of the 20th Century …

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 …

Principles of Terahertz Science and Technology aims to elucidate the fundamentals of THz
technology and science for potential new users. It surveys major techniques of generating …

A new temperature performance record of 199.5 K for terahertz quantum cascade lasers is
achieved by optimizing the lasing transition oscillator strength of the resonant phonon based …

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 (THz) detectors play an increasing role in different areas of human activities (eg,
security, biological, drugs and explosions detection, imaging, astronomy applications, etc.) …

The terahertz (THz) quantum cascade laser (QCL), first demonstrated in 2002, is among the
most promising radiation sources in the THz region owing to its high output power and broad …

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