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Spatial Patterns of Dissipative Polariton Solitons in Semiconductor Microcavities
J K Chana1, M Sich1, F Fras1,2
1Department of Physics and Astronomy, The University of Sheffield, Sheffield S3 7RH, United Kingdom.
Physical Review Letters
|January 2, 2016
Summary
Researchers created arrays of bound microcavity polariton solitons, controlling their number with laser pulses. These soliton arrays show phase locking, indicating stable multipeak structures.
Area of Science:
- Optics and Photonics
- Condensed Matter Physics
- Nonlinear Dynamics
Background:
- Microcavity polaritons are quasiparticles formed by the strong coupling of photons and excitons.
- Solitons are self-reinforcing wave packets that maintain their shape while propagating.
- Understanding the formation and dynamics of polariton solitons is crucial for developing new optical devices.
Purpose of the Study:
- To investigate the formation and properties of propagating bound microcavity polariton soliton arrays.
- To explore the control mechanisms for the number of solitons in an array.
- To analyze the conditions leading to soliton breakup and the formation of stable arrays.
Main Methods:
- Experimental generation of polariton soliton arrays using a triggering laser pulse.
- Observation of soliton arrays propagating along and perpendicular to the direction of propagation.
- Analysis of soliton number control via laser pulse size and power.
- Investigation of soliton breakup mechanisms in different directions.
- Numerical modeling to predict and confirm stable multihump soliton solutions.
Main Results:
- Successfully generated propagating bound microcavity polariton soliton arrays with multipeak structures.
- Observed arrays of up to five solitons, with the number controllable by laser pulse parameters.
- Identified conditions for soliton breakup along the propagation direction based on effective area and polariton interactions.
- Demonstrated phase locking between adjacent solitons, evidenced by narrowed emission in energy-momentum space.
- Observed stable array formation in the transverse direction originating from wavefront inhomogeneity.
Conclusions:
- Propagating bound microcavity polariton soliton arrays can be formed and controlled.
- Polariton-polariton interactions and wavefront properties play critical roles in soliton array formation and stability.
- Phase locking confirms the stability of multihump soliton solutions.
- The study provides insights into the nonlinear dynamics of light-matter quasiparticles in optical microcavities.
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