Monte Carlo study of intrinsic linewidths in terahertz quantum cascade lasers

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 ...

Nanowire terahertz quantum cascade lasers

An Instability Study in Terahertz Quantum Cascade Lasers

Terahertz (1−10 THz, 30−300 μm) frequencies are among the least developed electromagnetic spectra even though they have wide ranging applications in spectroscopy, imaging, and remote sensing [1]. Since the report of quantum-cascade-lasers (QCLs) operating in the terahertz spectral region by Köhler et al. [2] there has been significant progress concerning the available frequencies, the temperatu...

Terahertz photonic crystal quantum cascade lasers.

We combine photonic crystal and quantum cascade band engineering to create an in-plane laser at terahertz frequency. We demonstrate that such photonic crystal lasers strongly improve the performances of terahertz quantum cascade material in terms of threshold current, waveguide losses, emission mode selection, tunability and maximum operation temperature. The laser operates in a slow-light regi...