TY - JOUR
T1 - Topological valley Hall polariton condensation
AU - Peng, Kai
AU - Li, Wei
AU - Sun, Meng
AU - Rivero, Jose D.H.
AU - Ti, Chaoyang
AU - Han, Xu
AU - Ge, Li
AU - Yang, Lan
AU - Zhang, Xiang
AU - Bao, Wei
N1 - Publisher Copyright:
© The Author(s), under exclusive licence to Springer Nature Limited 2024.
PY - 2024/9
Y1 - 2024/9
N2 - A photonic topological insulator features robust directional propagation and immunity to defect perturbations of the edge/surface state. Exciton-polaritons, that is, the hybrid quasiparticles of excitons and photons in semiconductor microcavities, have been proposed as a tunable nonlinear platform for emulating topological phenomena. However, mainly due to excitonic material limitations, experimental observations so far have not been able to enter the nonlinear condensation regime or only show localized condensation in one dimension. Here we show a topological propagating edge state with polariton condensation at room temperature and without any external magnetic field. We overcome material limitations by using excitonic CsPbCl3 halide perovskites with a valley Hall lattice design. The polariton lattice features a large bandgap of 18.8 meV and exhibits strong nonlinear polariton condensation with clear long-range spatial coherence across the critical pumping density. The geometric parameters and material composition of our nonlinear many-body photonic system platform can in principle be tailored to study topological phenomena of other interquasiparticle interactions.
AB - A photonic topological insulator features robust directional propagation and immunity to defect perturbations of the edge/surface state. Exciton-polaritons, that is, the hybrid quasiparticles of excitons and photons in semiconductor microcavities, have been proposed as a tunable nonlinear platform for emulating topological phenomena. However, mainly due to excitonic material limitations, experimental observations so far have not been able to enter the nonlinear condensation regime or only show localized condensation in one dimension. Here we show a topological propagating edge state with polariton condensation at room temperature and without any external magnetic field. We overcome material limitations by using excitonic CsPbCl3 halide perovskites with a valley Hall lattice design. The polariton lattice features a large bandgap of 18.8 meV and exhibits strong nonlinear polariton condensation with clear long-range spatial coherence across the critical pumping density. The geometric parameters and material composition of our nonlinear many-body photonic system platform can in principle be tailored to study topological phenomena of other interquasiparticle interactions.
UR - http://www.scopus.com/inward/record.url?scp=85194237417&partnerID=8YFLogxK
U2 - 10.1038/s41565-024-01674-6
DO - 10.1038/s41565-024-01674-6
M3 - Article
C2 - 38789618
AN - SCOPUS:85194237417
SN - 1748-3387
VL - 19
SP - 1283
EP - 1289
JO - Nature Nanotechnology
JF - Nature Nanotechnology
IS - 9
ER -