Year: 2022
Type: article
Abstract: Quantum vortices are the quantized version of classical vortices. Their center is a phase singularity or vortex core around which the flow of particles as a whole circulates and is typical in superfluids, condensates and optical fields. However, the exploration of the motion of the phase singularities in coherently-coupled systems is still underway. We theoretically analyze the propagation of an interference dislocation in the regime of strong coupling between light and matter, with strong mass imbalance, corresponding to the case of microcavity exciton-polaritons. To this end, we utilize combinations of vortex and tightly focused Gaussian beams, which are introduced through resonant pulsed pumping. We show that a dislocation originates from self-interference fringes, due to the non-parabolic dispersion of polaritons combined with moving Rabi-oscillating vortices. The morphology of singularities is analyzed in the Poincaré space for the pseudospin associated to the polariton states. The resulting beam carries orbital angular momentum with decaying oscillations due to the loss of spatial overlap between the normal modes of the polariton system.
Source: Nanophotonics
Authors: Amir Rahmani, David Colas, Nina Voronova, Kazem Jamshidi‐Ghaleh, Lorenzo Dominici, Fabrice P. Laussy
Institutions: Azarbaijan Shahid Madani University, Centre National de la Recherche Scientifique, Aix-Marseille Université, Laboratoire de Mécanique et d’Acoustique, Centrale Méditerranée, Russian Quantum Center, National Research Nuclear University MEPhI, Istituto di Nanotecnologia, University of Wolverhampton
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,371
OpenAlex ID: W4229367894