Derntl, Christian G.
Bachmann, DominicShow all
- Journal Article
Rights / licenseCreative Commons Attribution 4.0 International
The gain recovery time of a heterogeneous active region terahertz quantum cascade laser is studied by terahertz-pump-terahertz-probe spectroscopy. The investigated active region, which is based on a bound-to-continuum optical transition with an optical phonon assisted extraction, exhibits a gain recovery time in the range of 34–50 ps dependent on the operation condition of the laser. The recovery time gets shorter for stronger pumping of the laser while the recovery dynamics slows down with increasing operation temperature. These results indicate the important role of the intracavity light intensity for the fast gain recovery. Show more
Journal / seriesApplied Physics Letters
Pages / Article No.
PublisherAmerican Institute of Physics
Organisational unit03759 - Faist, Jérôme / Faist, Jérôme
165639 - Monolithic, self referenced quantum cascade laser frequency comb (SNF)
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