Observation of quantized vortices in non-equilibrium polariton condensates, suggesting parallelisms with conventional superfluids, have been reported either by spontaneous formation and pinning in the presence of disorder or by imprinting it onto the signal or idler of an optical parametric oscillator (OPO). Here we report the first observation of a polariton condensate receiving a quantized angular momentum by means of a short optical pulse and maintaining its rotation for a time much longer than the pulse duration, the polariton and coherence lifetimes. This observation shows a peculiar character of polariton condensates and reveals analogies with supercurrents in superconductors or persistent flow in condensates.
Optical induced vortices and persistent currents in polariton condensates / G., Tosi; M., Baudish; D., Sanvitto; L., Viña; A., Lemaître; J., Bloch; Karimi, Ebrahim; Piccirillo, Bruno; Marrucci, Lorenzo. - In: JOURNAL OF PHYSICS. CONFERENCE SERIES. - ISSN 1742-6588. - STAMPA. - 210:(2010), pp. 012023-1-012023-4. [10.1088/1742-6596/210/1/012023]
Optical induced vortices and persistent currents in polariton condensates
KARIMI, ebrahim;PICCIRILLO, BRUNO;MARRUCCI, LORENZO
2010
Abstract
Observation of quantized vortices in non-equilibrium polariton condensates, suggesting parallelisms with conventional superfluids, have been reported either by spontaneous formation and pinning in the presence of disorder or by imprinting it onto the signal or idler of an optical parametric oscillator (OPO). Here we report the first observation of a polariton condensate receiving a quantized angular momentum by means of a short optical pulse and maintaining its rotation for a time much longer than the pulse duration, the polariton and coherence lifetimes. This observation shows a peculiar character of polariton condensates and reveals analogies with supercurrents in superconductors or persistent flow in condensates.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.