Thermoelectrically cooled THz quantum cascade laser operating up to 210 K

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We present a terahertz quantum cascade laser operating on a thermoelectric cooler up to a record-high temperature of 210.5 K. The active region design is based on only two quantum wells and achieves high temperature operation thanks to a systematic optimization by means of a nonequilibrium Green's function model. Laser spectra were measured with a room temperature detector, making the whole setup cryogenic free. At low temperatures (∼40 K), a maximum output power of 200 mW was measured.


  • L. Bosco
  • M. Franckié
  • G. Scalari
  • M. Beck
  • A. Wacker
  • J. Faist
External organisations
  • ETH Zürich
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Other Physics Topics
  • Other Electrical Engineering, Electronic Engineering, Information Engineering
Original languageEnglish
Article number010601
JournalApplied Physics Letters
Issue number1
Publication statusPublished - 2019 Jul 1
Publication categoryResearch

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