Mid-infrared quantum cascade lasers

Yu Yao, Anthony J. Hoffman, Claire F. Gmachl

Research output: Contribution to journalArticle

324 Citations (Scopus)

Abstract

Mid-infrared quantum cascade lasers are semiconductor injection lasers whose active core implements a multiple-quantum-well structure. Relying on a designed staircase of intersubband transitions allows free choice of emission wavelength and, in contrast with diode lasers, a low transparency point that is similar to a classical, atomic four-level laser system. In recent years, this design flexibility has expanded the achievable wavelength range of quantum cascade lasers to ∼3-25 μm and the terahertz regime, and provided exemplary improvements in overall performance. Quantum cascade lasers are rapidly becoming practical mid-infrared sources for a variety of applications such as trace-chemical sensing, health monitoring and infrared countermeasures. In this Review we focus on the two major areas of recent improvement: power and power efficiency, and spectral performance.

Original languageEnglish (US)
Pages (from-to)432-439
Number of pages8
JournalNature Photonics
Volume6
Issue number7
DOIs
StatePublished - Jul 2012
Externally publishedYes

Fingerprint

Quantum cascade lasers
quantum cascade lasers
infrared lasers
Infrared radiation
semiconductor lasers
Injection lasers
Wavelength
injection lasers
countermeasures
stairways
power efficiency
wavelengths
Transparency
Semiconductor quantum wells
health
Semiconductor lasers
flexibility
Health
quantum wells
Semiconductor materials

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

Cite this

Mid-infrared quantum cascade lasers. / Yao, Yu; Hoffman, Anthony J.; Gmachl, Claire F.

In: Nature Photonics, Vol. 6, No. 7, 07.2012, p. 432-439.

Research output: Contribution to journalArticle

Yao, Y, Hoffman, AJ & Gmachl, CF 2012, 'Mid-infrared quantum cascade lasers', Nature Photonics, vol. 6, no. 7, pp. 432-439. https://doi.org/10.1038/nphoton.2012.143
Yao, Yu ; Hoffman, Anthony J. ; Gmachl, Claire F. / Mid-infrared quantum cascade lasers. In: Nature Photonics. 2012 ; Vol. 6, No. 7. pp. 432-439.
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