PT Journal
AU Williams, BS
TI Terahertz quantum-cascade lasers
SO Nature Photonics
PY 2007
BP 517
EP 525
VL 1
DE QCL review
AB 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 regime between millimetre and infrared wavelengths, which has long resisted development. This paper reviews the state-of-the-art and future prospects for these lasers, including efforts to increase their operating temperatures, deliver higher output powers and emit longer wavelengths.
ER