Room temperature terahertz quantum cascade laser source based on intracavity difference-frequency generation

Mikhail A. Belkin, Federico Capasso, Feng Xie, Alexey Belyanin, Milan Fischer, Andreas Wittmann, J́rôme Faist

Research output: Contribution to journalArticlepeer-review

221 Scopus citations

Abstract

We report on our progress in the development of a terahertz quantum cascade laser source based on intracavity terahertz difference-frequency mixing in a dual-wavelength mid-infrared quantum cascade laser with the active region engineered to possess giant second-order nonlinear susceptibility. In this letter, we demonstrate devices that operate in mid-infrared at λ1 =8.9 μm and λ2 =10.5 μm and produce terahertz output at λ≈60 μm via difference-frequency generation with 7 μW output power at 80 K, 1 μW output at 250 K, and still approximately 300 nW output at 300 K.

Original languageEnglish
Article number201101
JournalApplied Physics Letters
Volume92
Issue number20
DOIs
StatePublished - 2008
Externally publishedYes

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