Temperature dependence of the gain profile for terahertz quantum cascade lasers

By R. Nelander, Andreas Wacker. 2007

180 citations recorded by the source corpus.

We study the rapid decrease of peak gain in resonant-phonon terahertz quantum cascade lasers with increasing temperature. The effect of various microscopic scattering processes on the gain profile as a function of temperature is discussed. We argue that increased broadening, primarily due to increased impurity scattering, and not diminishing population inversion, is the main reason for the reduction of peak gain.

Subfields: Atmospheric Science, Electrical and Electronic Engineering, Spectroscopy

View Paper: https://www.semanticscholar.org/paper/cf5b9132879c755ea03a9362beae65ebb46dd420

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Atmospheric Science

1. Sushil Kumar
2. Q. Hu
3. J. Reno
4. B. Williams

In Electrical and Electronic Engineering

1. Sushil Kumar
2. J. Reno
3. Q. Hu
4. Chun Wang Ivan Chan
5. Goutam Chattopadhyay
6. B. Williams
7. F. Capasso

In Spectroscopy

1. Sushil Kumar
2. J. Reno
3. Q. Hu
4. Chun Wang Ivan Chan
5. Goutam Chattopadhyay
6. B. Williams
7. F. Capasso

Citations in the corpus

• A 1.8-THz quantum cascade laser operating significantly above the temperature of ℏω/kB (2011, background): “This weakens the sensitivity of the current injection to dephasing scattering processes, which are believed to become stronger with temperature and lead to a reduction in the peak gai”