论文标题
北极星晶体中的合成带结构工程，具有非铁质拓扑阶段
Synthetic band-structure engineering in polariton crystals with non-Hermitian topological phases
论文作者
论文摘要
合成晶体晶格提供了理想的环境，用于在清洁和受控的实验环境中模拟和探索固态材料的带结构。到目前为止，物理实现主要集中在实施系统的不可逆图案上，或干扰技术（例如冷原子的光学晶格）。在这里，我们意识到在所有光学激子 - 波利顿晶格中可重编程的合成带结构工程。我们证明了利用可延展的光学上印刷的非静态潜在景观的线性一维晶格，周期性环，二光式非平凡拓扑相的激发态和缺陷模式。凝结物晶格的稳定激发性质在站点之间具有较强的相互作用，导致了Su-Schrieffer-Heeger系统的积极可调的非热类似物。
Synthetic crystal lattices provide ideal environments for simulating and exploring the band structure of solid-state materials in clean and controlled experimental settings. Physical realisations have, so far, dominantly focused on implementing irreversible patterning of the system, or interference techniques such as optical lattices of cold atoms. Here, we realise reprogrammable synthetic band-structure engineering in an all optical exciton-polariton lattice. We demonstrate polariton condensation into excited states of linear one-dimensional lattices, periodic rings, dimerised non-trivial topological phases, and defect modes utilising malleable optically imprinted non-Hermitian potential landscapes. The stable excited nature of the condensate lattice with strong interactions between sites results in an actively tuneable non-Hermitian analogue of the Su-Schrieffer-Heeger system.
