Title: Theoretical and Experimental Studies of Vortex and Soliton Dynamics in Exciton-Polariton Quantum Fluids
Abstract: Present talk is devoted to studies of the wave function topological defects in the system of exciton-polaritons in semiconductor microcavities, the so called quantum fluids of light. In the first part of talk the possibility to freeze the soliton modulational instability development and observe the emerged vortex-antivortex pair chains in CW regime of quasi-resonant pump is demonstrated theoretically and experimentally. The underlying stabilization mechanism which freezes the vortex-antivortex pairs is polariton flow from the corridor walls shaped by SLM and confining the initial solitons. The parallel solitons in the alternative configuration, the supersonic polariton flow hitting the obstacle, were also studied. In the second part of talk the exciton-polariton quantum fluids are considered as a system to study the problem of quantum turbulence. The relation between fractal dimension of vortex cluster structures and energy cascade is analyzed for various principles of energy injection (condensate stirring). The problems of finite polariton lifetime and single-shot wave function phase resolution were outlined. Additionally, the talk reveals the feasibility of observing the turbulent regime in the spinor polariton quantum fluids with TE-TM splitting type Spin-Orbit Coupling at CW quasi-resonant pumping.