Nonlinear Dynamics in Semiconductor Lasers 2023 - Abstract
Boiko, Dmitri
Cooperative emission due to spontaneous build-up and rapid decay of macroscopic polarization dipole in a strongly inverted gain medium is drastically different from the lasing dynamics. Suddenly, the medium polarization and not the cavity field begins to drive the system in the Maxwell--Bloch picture. Yet as pioneered by Dicke, the decay of the highest-energy state in a quantum ensemble of two-level systems proceeds through a ladder of the highest-symmetry partially deexcited states, each of which is formalistically an entangled state in mathematical sense. In this talk, on example of multi-section tandem cavity laser heterostructures I will attempt to address two important questions from both theoretical and experimental view-points: (i) How can the superradiance be reached in semiconductor quantum wells albeit the ultrafast dephasing of individual microscopic e-h dipoles? (ii) Could the ensemble non-classicality be transferred to the emitted optical field and what could be the photon state?