We study, both theoretically and experimentally, the occurrence of topological defects in polariton superfluids in the optical parametric oscillator (OPO) regime. We explain in terms of local supercurrents the deterministic behavior of both the onset and dynamics of vortex-antivortex pairs generated by perturbing the system with a pulsed probe. Using a generalized Gross-Pitaevskii equation, including photonic disorder, pumping and decay, we elucidate the reason why topological defects form in couples and can be detected by direct visualizations in multishot OPO experiments.
Onset and dynamics of vortex-antivortex pairs in polariton optical parametric oscillator superfluids / G., Tosi; F. M., Marchetti; D., Sanvitto; C., Antón; M. H., Szymańska; A., Bercenau; C., Tejedor; Marrucci, Lorenzo; A., Lemaître; J., Bloch; L., Viña. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 107:(2011), pp. 036401-1-036401-4. [10.1103/PhysRevLett.107.036401]
Onset and dynamics of vortex-antivortex pairs in polariton optical parametric oscillator superfluids
MARRUCCI, LORENZO;
2011
Abstract
We study, both theoretically and experimentally, the occurrence of topological defects in polariton superfluids in the optical parametric oscillator (OPO) regime. We explain in terms of local supercurrents the deterministic behavior of both the onset and dynamics of vortex-antivortex pairs generated by perturbing the system with a pulsed probe. Using a generalized Gross-Pitaevskii equation, including photonic disorder, pumping and decay, we elucidate the reason why topological defects form in couples and can be detected by direct visualizations in multishot OPO experiments.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
