Review abstract
Nature Photonics 1, 517 - 525 (2007)
doi:10.1038/nphoton.2007.166
Subject Categories: Lasers, LEDs and light sources | Terahertz optics
Terahertz quantum-cascade lasers
Benjamin S. Williams1
Abstract
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.
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University of California at Los Angeles, Department of Electrical Engineering, Los Angeles, California 90095-1594, USA
e-mail: bwilliam@ee.ucla.edu
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