251 citations · 449 across the 10 of their papers we have counts for
10 papers
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…
Controlling many-body effects in the midinfrared gain and THz absorption of quantum cascade laser structures
M. F. Pereira, S. -C. Lee, A. Wacker
A many-body theory based on nonequilibrium Green functions, in which transport and optics are treated on a microscopic quantum mechanical basis, is used to compute gain and absorpt…
Simulation of Transport and Gain in Quantum Cascade Lasers
A. Wacker, S. -C. Lee, M. F. Pereira
Quantum cascade lasers can be modeled within a hierarchy of different approaches: Standard rate equations for the electron densities in the levels, semiclassical Boltzmann equation…
Nonequilibrium Green's function theory for transport and gain properties of quantum cascade structures
S. -C. Lee, A. Wacker
The transport and gain properties of quantum cascade (QC) structures are investigated using a nonequilibrium Green's function (NGF) theory which includes quantum effects beyond a B…
Dynamical bistability in quantum dot structures: The role of Auger processes
A. Rack, R. Wetzler, A. Wacker +1
Bistability in quantum dot structures is examined by a drift-diffusion model in combination with electron capture and emission processes. Our simulations provide a dynamic scenario…
Gain and Loss in Quantum Cascade Lasers
A. Wacker, S. -C. Lee
We report gain calculations for a quantum cascade laser using a fully self-consistent quantum mechanical approach based on the theory of nonequilibrium Green functions. Both the ab…