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Rotating patterns in polariton condensates in ring-shaped potentials under a bichromatic pump
Optics Letters
|October 1, 2019
Summary
We demonstrate steadily rotating nonlinear localized modes in a polariton condensate. Their rotation frequency depends on pump laser properties and ring potential, with bistability observed due to interactions.
Area of Science:
- Quantum optics
- Condensed matter physics
- Nonlinear dynamics
Background:
- Polariton condensates in microcavities are crucial for quantum simulation.
- Vortical laser beams with topological charges offer unique excitation methods.
- Ring-shaped potentials confine particles, influencing their dynamics.
Purpose of the Study:
- To investigate the excitation of rotating nonlinear localized modes in a confined polariton condensate.
- To analyze the influence of bichromatic pump lasers with different topological charges on mode dynamics.
- To explore the role of repulsive polariton-polariton interactions and resonance effects.
Main Methods:
- Theoretical modeling of a polariton condensate in a ring-shaped potential.
- Simulation of excitation by a bichromatic resonant pump with vortical laser beams.
- Analysis of mode stability, rotation frequency, and amplitude response.
Main Results:
- Steady rotation of nonlinear localized modes was successfully excited.
- Mode angular frequency is tunable via optical frequencies and topological charges of pump beams.
- Resonant amplification of mode amplitude occurs near eigenfrequencies of the ring potential.
- Repulsive interactions induce resonance curve tilting and bistability in rotating patterns.
Conclusions:
- The system supports controllable, rotating nonlinear localized modes.
- Bichromatic pumping and confinement offer a versatile platform for exploring complex polariton dynamics.
- Bistability in rotating patterns highlights the significant role of inter-particle interactions.
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