%0 Journal Article %T Terahertz quantum-cascade lasers %A Williams, Benjamin S. %J Nature Photonics %D 2007 %V 1 %F Williams2007 %O exported from refbase (https://db.rplab.ru/refbase/show.php?record=632), last updated on Wed, 06 Jul 2011 12:38:23 -0500 %X 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. %K QCL review %P 517-525