Monte Carlo study of terahertz difference frequency generation in quantum cascade lasers

Terahertz sources based on Čerenkov difference-frequency generation in quantum cascade lasers

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Coupled carrier–phonon nonequilibrium dynamics in terahertz quantum cascade lasers: a Monte Carlo analysis

The operation of state-of-the-art optoelectronic quantum devices may be significantly affected by the presence of a nonequilibrium quasiparticle population to which the carrier subsystem is unavoidably coupled. This situation is particularly evident in new-generation semiconductor-heterostructure-based quantum emitters, operating both in the mid-infrared as well as in the terahertz (THz) region...

Monte Carlo Simulation of Electron Transport in Quantum Cascade Lasers

We describe a numerical simulator for the electron transport in quantum cascade lasers (QCLs). A semi-classical transport model based on the Pauli master equation (PME) is used as it is considered a good trade-off between physical accuracy and computational efficiency [1]. The basis states for the PME are determined using a multi-band k·p Hamiltonian in order to account for the effects of band ...

Origins of Terahertz Difference Frequency Susceptibility in Midinfrared Quantum Cascade Lasers

We present a density-matrix-based transport model applicable to quantum cascade lasers which computes both linear and nonlinear optical properties coherently and nonperturbatively. The model is applied to a dual-active-region midinfrared quantum cascade laser which generates terahertz radiation at the difference frequency between two midinfrared pumps. A new mechanism for terahertz generation i...

Nanowire terahertz quantum cascade lasers