Optical Control of Couplings in Polariton Condensate Lattices
Optical Control of Couplings in Polariton Condensate Lattices
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DOI：
10.1103/physrevlett.124.207402
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发表时间：
2020-05-21
影响因子：
8.6
通讯作者：
Lagoudakis, P. G.
中科院分区：
文献类型：
--
作者：
Alyatkin, S.;Topfer, J. D.;Lagoudakis, P. G.
我们证明了确定性控制的最近和次近邻耦合的正方形晶格的微腔激子极化激元凝聚体的晶胞。我们调整耦合在一个连续的和可逆的方式，通过光学压印势垒的可变高度，在空间局部化的非相干激子水库的形式，修改凝聚体之间的粒子流。通过控制在2 × 2极化激元集群的耦合，我们实现了铁磁，反铁磁，和成对的铁磁相，并展示了潜在的可扩展性的系统。
We demonstrate deterministic control of the nearest and next-nearest neighbor coupling in the unit cell of a square lattice of microcavity exciton-polariton condensates. We tune the coupling in a continuous and reversible manner by optically imprinting potential barriers of variable height, in the form of spatially localized incoherent exciton reservoirs that modify the particle flow between condensates. By controlling the couplings in a 2 x 2 polariton cluster, we realize ferromagnetic, antiferromagnetic, and paired ferromagnetic phases and demonstrate the potential scalability of the system.