The terahertz (THz) quantum cascade laser (QCL), first demonstrated in 2002, is among the
most promising radiation sources in the THz region owing to its high output power and broad …

Even though already in the seventies, right after the invention of the quantum cascade laser
(QCL) concept, it was argued that this device could be operated in the THz (far-infrared) …

A general theoretical approach to study the quantum kinetics in a system coupled to a bath
is proposed. Starting with the microscopic interaction, a Lindblad master equation is …

We present a two-quantum well THz intersubband laser operating up to 192 K. The structure
has been optimized using non-equilibrium Green's function model. The result of this …

We study the operation of an 8.5 μm quantum cascade laser based on GaInAs/AlInAs lattice
matched to InP using three different simulation models based on density matrix (DM) and …

An amplifying quantum-cascade (QC) metasurface, the key component of the QC vertical-
external-cavity surface-emitting-laser (VECSEL), is studied as a function of injected current …

We study the impact of interface roughness on the operation of mid-IR and THz quantum
cascade lasers. Particular emphasis is given towards the differences between the Gaussian …

The linewidth enhancement factor (LEF) describes the coupling between amplitude and
phase fluctuations in a semiconductor laser and has recently been shown to be a crucial …

We present a systematic comparison of the results from our non-equilibrium Green's function
formalism with a large number of AlGaAs-GaAs terahertz quantum cascade lasers …

The active region of a THz (terahertz) quantum-cascade laser based on three tunnel-
coupled GaAs/Al 0.15 Ga 0.85 As quantum wells with a resonance-phonon depopulation …