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

  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},
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… 

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