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Macroscopic two-dimensional polariton condensates
Ballarini, Dario Caputo, Davide Muñoz, Carlos Sánchez De Giorgi, Milena Dominici, Lorenzo Szymańska, Marzena H. West, Kenneth Pfeiffer, Loren N. Gigli, Giuseppe Laussy, Fabrice
Ballarini, Dario
Caputo, Davide
Muñoz, Carlos Sánchez
De Giorgi, Milena
Dominici, Lorenzo
Szymańska, Marzena H.
West, Kenneth
Pfeiffer, Loren N.
Gigli, Giuseppe
Laussy, Fabrice
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2017-05-26
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Abstract
We report a record-size, two-dimensional polariton condensate of a fraction of a millimeter radius free from the presence of an exciton reservoir. This macroscopically occupied state is formed by the ballistically expanding polariton flow that relaxes and condenses over a large area outside of the excitation spot. The density of this trap-free condensate is <1 polariton /μm2, reducing the phase noise induced by the interaction energy. Moreover, the backflow effect, recently predicted for the nonparabolic polariton dispersion, is observed here for the first time in the fast-expanding wave packet.
Citation
Ballarini D., Caputo D., Muñoz CS., De Giorgi M., Dominici L., Szymańska MH., West K., Pfeiffer LN., Gigli G., Laussy FP., Sanvitto D. 'Macroscopic two-dimensional polariton condensates', Physical Review Letters. 118 (21)
doi: 10.1103/PhysRevLett.118.215301
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Journal article
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en
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0031-9007