Regensburg 2022 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 25: Poster 1

HL 25.91: Poster

Mittwoch, 7. September 2022, 18:00–20:00, P2

Polariton condensation with extreme confinement of light — •Maria Vittoria Gurrieri1, Philip Kristensen1, Jesper Mork1, and Emil Denning21Department of Electrical and Photonics Engineering, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark — 2Nonlinear Optics and Quantum Electronics, Technical University of Berlin, 10623 Berlin, Germany

Strong coupling between light and electronic excitations mixes the constituent eigenstates into hybrid polaritonic quasiparticles. Under certain conditions it is possible to predict the formation of a polariton condensate with macroscopic occupation number and spontaneous coherence in the ground state. This condensate is a source of coherent matter waves and photons.

In this work we theoretically investigate the possibility of achieving polariton condensation in an extended sheet of 2D semiconductor coupled to a novel dielectric nanocavity with deep subwavelength confinement and featuring a spectrally isolated mode. Such coupling leads to the formation of a spatially localized polariton state, which interacts with the continuum of excitons through Coulomb interaction. The system is modelled by a Born-Markov master equation for the polariton subsystem, where the exciton continuum is traced out. This enables the derivation of a rate equation model to describe the dynamics of the lower polariton population.

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