484 citations · 3k across the 64 of their papers we have counts for
6 papers · 1 filter
Temperature dependence of the gain profile for THz quantum cascade lasers
Rikard Nelander, Andreas Wacker
We study the rapid decrease of peak gain in resonant-phonon THz Quantum Cascade Lasers with increasing temperature. The effect of various microscopic scattering processes on the ga…
Fingerprints of spatial charge transfer in Quantum Cascade Lasers
R. Nelander, A. Wacker, M. F. Pereira +7
We show that mid infrared transmission spectroscopy of a quantum cascade laser provides clear cut information on changes in charge location at different bias. Theoretical simulatio…
Coherence and Spatial Resolution of Transport in Quantum Cascade Lasers
Andreas Wacker
The method of nonequilibrium Greens functions allows for a spatial and energetical resolution of the electron current in Quantum Cascade Lasers. While scattering does not change th…
Coherent Transport through an interacting double quantum dot: Beyond sequential tunneling
Jonas Nyvold Pedersen, Benny Lassen, Andreas Wacker +1
Various causes for negative differential conductance in transport through an interacting double quantum dot are investigated. Particular focus is given to the interplay between the…
Electron Transport through Nanosystems Driven by Coulomb Scattering
Benny Lassen, Andreas Wacker
Electron transmission through nanosystems is blocked if there are no states connecting the left and the right reservoir. Electron-electron scattering can lift this blockade and we…
Zero-phonon linewidth and phonon satellites in the optical absorption of nanowire-based quantum dots
Greta Lindwall, Andreas Wacker, Carsten Weber +1
The optical properties of quantum dots embedded in a catalytically grown semiconductor nanowire are studied theoretically. In comparison to dots in a bulk environment, the excitoni…