# Density-Matrix Model for Photon-Driven Transport in Quantum Cascade Lasers

@article{Soleimanikahnoj2020DensityMatrixMF, title={Density-Matrix Model for Photon-Driven Transport in Quantum Cascade Lasers}, author={Sina Soleimanikahnoj and Michelle King and I. Knezevic}, journal={Physical review applied}, year={2020}, volume={15}, pages={034045} }

We developed a time-dependent density-matrix model to study photon-assisted (PA) electron transport in quantum cascade lasers. The Markovian equation of motion for the density matrix in the presence of an optical field is solved for an arbitrary field amplitude. Level-broadening terms emerge from microscopic Hamiltonians and supplant the need for empirical parameters that are often employed in related approaches. We show that, in quantum cascade lasers with diagonal design, photon resonances…

## 37 References

### A density matrix model of transport and radiation in quantum cascade lasers

- Physics
- 2010

A transport model for quantum cascade lasers based on density matrix formalism that incorporates the laser optical field is confronted with experiment. For a typical mid-infrared laser, very good…

### Partially coherent electron transport in terahertz quantum cascade lasers based on a Markovian master equation for the density matrix

- Physics
- 2016

We derive a Markovian master equation for the single-electron density matrix, applicable to quantum cascade lasers (QCLs). The equation conserves the positivity of the density matrix, includes…

### Density-matrix theory of the optical dynamics and transport in quantum cascade structures: The role of coherence

- Physics
- 2009

The impact of coherence on the nonlinear optical response and stationary transport is studied in quantum cascade laser structures. Nonequilibrium effects such as the pump-probe signals, the…

### Quantum Transport Simulation of High-Power 4.6-μm Quantum Cascade Lasers

- Physics
- 2016

We present a quantum transport simulation of a 4.6- μ m quantum cascade laser (QCL) operating at high power near room temperature. The simulation is based on a rigorous density-matrix-based…

### Coherence of resonant-tunneling transport in terahertz quantum-cascade lasers

- Physics
- 2009

We develop simple density-matrix models to describe the role of coherence in resonant-tunneling (RT) transport of quantum-cascade lasers (QCLs). Specifically, we investigate the effects of coherent…

### Gain recovery dynamics and photon-driven transport in quantum cascade lasers.

- PhysicsPhysical review letters
- 2008

Femtosecond time-resolved pump-probe measurements are employed to investigate the nature of the transport through the laser structure via the dynamics of the gain to find the gain recovery in quantum cascade lasers.

### Photon-induced carrier transport in high efficiency midinfrared quantum cascade lasers

- Physics
- 2011

A midinfrared quantum cascade laser with high wall-plug efficiency is analyzed by means of an ensemble Monte Carlo method. Both the carrier transport and the cavity field dynamics are included in the…

### Gain in quantum cascade lasers and superlattices: A quantum transport theory

- Physics
- 2002

Gain in current-driven semiconductor heterostructure devices is calculated within the theory of nonequilibrium Green functions. In order to treat the nonequilibrium distribution self-consistently the…

### Modeling quantum cascade lasers: Coupled electron and phonon transport far from equilibrium and across disparate spatial scales

- Physics
- 2016

Quantum cascade lasers (QCLs) are high‐power coherent light sources in the midinfrared and terahertz parts of the electromagnetic spectrum. They are devices in which the electronic and lattice…

### Time-dependent transport in open systems based on quantum master equations

- Physics
- 2013

Electrons in the active region of a nanostructure constitute an open many-body quantum system, interacting with contacts, phonons, and photons. We review the basic premises of the open system theory,…