Collective excitations of exciton-polariton condensates in a synthetic gauge field
| Autor: | Loren Pfeiffer, Mark Steger, Elena A. Ostrovskaya, Eliezer Estrecho, Kenneth D. West, D. Biegańska, Marcin Syperek, David W. Snoke, Andrew G. Truscott, Maciej Pieczarka |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Physics
Condensed Matter::Quantum Gases Spinor Condensed matter physics Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter::Other Exciton FOS: Physical sciences General Physics and Astronomy Physics::Optics 02 engineering and technology Exciton-polaritons 021001 nanoscience & nanotechnology 01 natural sciences Quantum Gases (cond-mat.quant-gas) Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences Quasiparticle Polariton Singlet state Gauge theory 010306 general physics 0210 nano-technology Condensed Matter - Quantum Gases Spin-½ |
| Popis: | Collective (elementary) excitations of quantum bosonic condensates, including condensates of exciton polaritons in semiconductor microcavities, are a sensitive probe of interparticle interactions. In anisotropic microcavities with momentum-dependent transverse-electric--transverse-magnetic splitting of the optical modes, the excitations' dispersions are predicted to be strongly anisotropic, which is a consequence of the synthetic magnetic gauge field of the cavity, as well as the interplay between different interaction strengths for polaritons in the singlet and triplet spin configurations. Here, by directly measuring the dispersion of the collective excitations in a high-density optically trapped exciton-polariton condensate, we observe excellent agreement with the theoretical predictions for spinor polariton excitations. We extract the interaction constants for polaritons of the same and opposite spin and map out the characteristic spin textures in an interacting spinor condensate of exciton polaritons. |
| Databáze: | OpenAIRE |
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