Gain-Induced Trapping of Microcavity Exciton Polariton Condensates
Gain-Induced Trapping of Microcavity Exciton Polariton Condensates
We have performed real and momentum space spectroscopy of exciton polariton condensates in a GaAs-based microcavity under nonresonant excitation with an intensity-stabilized laser. An effective trapping mechanism is revealed, which is due to the stimulated scattering gain inside the finite excitation spot combined with the short lifetime. We observe several …