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arXiv 2001.07616cond-mat.mes-hall
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非厄米拓扑相极化激元晶体中的合成能带结构工程

Synthetic band-structure engineering in polariton crystals with non-Hermitian topological phases

L. Pickup, H. Sigurdsson, J. Ruostekoski, P. G. Lagoudakis

摘要:

合成晶格为在清洁和受控的实验环境中模拟和探索固态材料的能带结构提供了理想的环境。到目前为止,物理实现主要集中在实现系统的不可逆图案化或干涉技术,如冷原子的光晶格。在这里,我们实现了全光激子-极化激元晶格中的可重编程合成能带结构工程。我们证明极化激元凝聚成线性一维晶格,周期环,二聚非平凡的拓扑相,和缺陷模式利用可塑性光学印记非厄米特潜在景观的激发态。凝聚晶格的稳定激发性质与站点之间的强相互作用的结果在一个积极可调的非厄米模拟的苏-Schrieffer-Heeger系统。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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