Vortices in exciton-polariton condensates with polarization splitting

Abstract

The presence of polarization splitting of exciton-polariton branches in planar semiconductor microcavities has a pronounced effect on vortices in polariton condensates. We show that the TE-TM splitting leads to the coupling between the left and right half-vortices (vortices in the right and left circular components of the condensate), that otherwise do not interact. We analyze also the effect of linear polarization pinning resulted from a fixed splitting between two perpendicular linear polarizations. In this case, half-vortices acquire strings (solitons) attached to them. The half-vortices with strings can be detected by observing the interference fringes of light emitted from the cavity in two circular polarizations. The string affects the fringes in both polarizations. Namely, the half-vortex is characterized by an asymmetric fork-like dislocation in one circular polarization; the fringes in the other circular polarization are continuous, but they are shifted by crossing the string.

4 pages, 2 figs, Optics of Excitons in Confined Systems 11 (Madrid, 7-11 september 2009)

References in corpus (3)

• Quantised Vortices in an Exciton-Polariton Fluid
• Half-vortices in polariton condensates
• Polarized polariton condensates and coupled XY models

Cited by in corpus (6)

• Spatial pattern formation and polarization dynamics of a nonequilibrium spinor polariton condensate
• Oblique Half-Solitons and their Generation in Exciton-Polariton Condensates
• Stable magnetic monopoles in spinor polariton condensates
• Half-Vortex Unbinding and Ising Transition in Constrained Superfluids
• Comment on "Topological stability of the half-vortices in spinor exciton-polariton condensates"
• Mean-field description of multicomponent exciton-polariton superfluids