TY - JOUR
T1 - Macroscopic Two-Dimensional Polariton Condensates
AU - Ballarini, Dario
AU - Caputo, Davide
AU - Muñoz, Carlos Sánchez
AU - De Giorgi, Milena
AU - Dominici, Lorenzo
AU - Szymańska, Marzena H.
AU - West, Kenneth
AU - Pfeiffer, Loren N.
AU - Gigli, Giuseppe
AU - Laussy, Fabrice P.
AU - Sanvitto, Daniele
N1 - Publisher Copyright:
© 2017 American Physical Society.
PY - 2017/5/26
Y1 - 2017/5/26
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevLett.118.215301
DO - 10.1103/PhysRevLett.118.215301
M3 - Article
C2 - 28598653
AN - SCOPUS:85019744469
SN - 0031-9007
VL - 118
JO - Physical review letters
JF - Physical review letters
IS - 21
M1 - 215301
ER -