77 citations · 165 across the 5 of their papers we have counts for
5 papers
Domain formation and self-sustained oscillations in quantum cascade lasers
Tim Almqvist, David O. Winge, Emmanuel Dupont +1
We study oscillations in quantum cascade lasers due to traveling electric field domains, which are observed both in simulations and experiments. These oscillations occur in a range…
Ignition of quantum cascade lasers in a state of oscillating electric field domains
David O. Winge, Emmanuel Dupont, Andreas Wacker
Quantum Cascade Lasers (QCLs) are generally designed to avoid negative differential conductivity (NDC) in the vicinity of the operation point in order to prevent instabilities. We…
A phonon scattering assisted injection and extraction based terahertz quantum cascade laser
E. Dupont, S. Fathololoumi, Z. R. Wasilewski +6
A novel lasing scheme for terahertz quantum cascade lasers, based on consecutive phonon-photon-phonon emissions per module, is proposed and experimentally demonstrated. The charge…
Free carrier absorption in quantum cascade structures
F. Carosella, C. Ndebeka-Bandou, R. Ferreira +5
We show that the free carrier absorption in Quantum Cascade Lasers is very small and radically different from the classical Drude result on account of the orthogonality between the…
Unraveling of free carrier absorption for terahertz radiation in heterostructures
Andreas Wacker, Gerald Bastard, Francesca Carosella +2
The relation between free carrier absorption and intersubband transitions in semiconductor heterostructures is resolved by comparing a sequence of structures. Our numerical and ana…