TY - JOUR

T1 - Spatial quantization of exciton-polariton condensates in optically induced traps

AU - Aladinskaia, Ekaterina

AU - Cherbunin, Roman

AU - Sedov, Evgeny

AU - Liubomirov, Alexey

AU - Kavokin, Kirill

AU - Khramtsov, Evgeny

AU - Petrov, Mikhail

AU - Savvidis, P.G.

AU - Kavokin, Alexey

PY - 2023/1/11

Y1 - 2023/1/11

N2 - We study formation of exciton polariton condensates in pot-like traps created by optical pumping in a planar microcavity with embedded quantum wells. The trap is formed by the repulsive reservoir of incoherent excitons excited by the ring-shaped non-resonant laser beam. Polariton condensates confined in a trapping potential are subject to spatial confinement leading to the energy quantization. We reveal experimentally the discrete spectrum of polariton eigenstates in an optical trap that can be characterised by a pair of quantum numbers: the azimuthal and the radial quantum numbers, that correspond to the number of nodes of the condensate wavefunction in the corresponding directions. The occupation numbers of the eignestates of a polariton condensate are determined by the overlap integral of the condensate wavefunction and the exciton reservoir spatial density distribution. The non-resonant pumping scheme enables engineering the shape and size of the trap, that allows to selectively excite specific superpositions of the eigen-states of a polariton condensate in each experiment. We demonstrate both single and multiple mode polariton lasing in an optical trap.

AB - We study formation of exciton polariton condensates in pot-like traps created by optical pumping in a planar microcavity with embedded quantum wells. The trap is formed by the repulsive reservoir of incoherent excitons excited by the ring-shaped non-resonant laser beam. Polariton condensates confined in a trapping potential are subject to spatial confinement leading to the energy quantization. We reveal experimentally the discrete spectrum of polariton eigenstates in an optical trap that can be characterised by a pair of quantum numbers: the azimuthal and the radial quantum numbers, that correspond to the number of nodes of the condensate wavefunction in the corresponding directions. The occupation numbers of the eignestates of a polariton condensate are determined by the overlap integral of the condensate wavefunction and the exciton reservoir spatial density distribution. The non-resonant pumping scheme enables engineering the shape and size of the trap, that allows to selectively excite specific superpositions of the eigen-states of a polariton condensate in each experiment. We demonstrate both single and multiple mode polariton lasing in an optical trap.

KW - Polariton condensate

KW - Microcavity & microdisk lasers

KW - Quantum rings

UR - https://journals.aps.org/prb/abstract/10.1103/PhysRevB.107.045302

M3 - Article

VL - 107

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

M1 - 045302

ER -