title: Polariton condensation in dynamic acoustic lattices.
abstract: We demonstrate that the tunable potential introduced by a surface acoustic wave on a homogeneous polariton condensate leads to fragmentation of the condensate into an array of wires which move with the acoustic velocity. Reduction of the spatial coherence of the condensate emission along the surface acoustic wave direction is attributed to the suppression of coupling between the spatially modulated condensates. Interparticle interactions observed at high polariton densities screen the acoustic potential, partially reversing its effect on spatial coherence.
authors.affiliation: Paul-Drude-Institut für Festkörperelektronik, Berlin, Germany.
authors.forename: E A
authors.initials: EA
authors.lastname: Cerda-Méndez
authors.forename: D N
authors.initials: DN
authors.lastname: Krizhanovskii
authors.forename: M
authors.initials: M
authors.lastname: Wouters
authors.forename: R
authors.initials: R
authors.lastname: Bradley
authors.forename: K
authors.initials: K
authors.lastname: Biermann
authors.forename: K
authors.initials: K
authors.lastname: Guda
authors.forename: R
authors.initials: R
authors.lastname: Hey
authors.forename: P V
authors.initials: PV
authors.lastname: Santos
authors.forename: D
authors.initials: D
authors.lastname: Sarkar
authors.forename: M S
authors.initials: MS
authors.lastname: Skolnick