Details

Autor(en) / Beteiligte

• Xiang, Bo
• Li, Yiliu
• Spencer, M. S.
• Dai, Yanan
• Bai, Yusong
• Basov, Dmitri N.
• Zhu, X.-Y.

Titel

Optical spin hall effect in exciton–polariton condensates in lead halide perovskite microcavities

Ist Teil von

• The Journal of chemical physics, 2024-04, Vol.160 (16)

Ort / Verlag

United States: American Institute of Physics

Erscheinungsjahr

2024

Quelle

AIP Journals Complete

Beschreibungen/Notizen

• An exciton–polariton condensate is a hybrid light–matter state in the quantum fluid phase. The photonic component endows it with characters of spin, as represented by circular polarization. Spin-polarization can form stochastically for quasi-equilibrium exciton–polariton condensates at parallel momentum vector k|| ∼ 0 from bifurcation or deterministically for propagating condensates at k|| > 0 from the optical spin-Hall effect (OSHE). Here, we report deterministic spin-polarization in exciton–polariton condensates at k|| ∼ 0 in microcavities containing methylammonium lead bromide perovskite (CH3NH3PbBr3) single crystals under non-resonant and linearly polarized excitation. We observe two energetically split condensates with opposite circular polarizations and attribute this observation to the presence of strong birefringence, which introduces a large OSHE at k|| ∼ 0 and pins the condensates in a particular spin state. Such spin-polarized exciton–polariton condensates may serve not only as circularly polarized laser sources but also as effective alternatives to ultracold atom Bose–Einstein condensates in quantum simulators of many-body spin–orbit coupling processes.