Temperature dependent nonlinear response of quantum cascade structures
Research output: Contribution to journal › Article
Current response and gain spectrum of a terahertz quantum cascade laser is analyzed at different temperatures by a nonequilibrium Green's functions approach. The simulations are compared to recent results of time domain spectroscopy. Being able to retrieve higher harmonics of the response function, nonlinear phenomena in quantum cascade lasers are studied theoretically. For different temperatures, gain is simulated under operating conditions and related to the intensity inside the cavity, showing the degradation of performance with temperature. Resolving the electron densities in energy shows the breakdown of inversion at high intensities.
|Research areas and keywords||
Subject classification (UKÄ) – MANDATORY
|Journal||Optical and Quantum Electronics|
|Publication status||Published - 2014|
No data available
Related research output
David Winge, 2016 Nov, Lund: Lund University, Faculty of Science, Department of Physics, Division of Mathematical Physics. 162 p.
Research output: Thesis › Doctoral Thesis (compilation)