Quantum fluids of light in all-optical scatterer lattices.
Quantum fluids of light in all-optical scatterer lattices.
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DOI：
10.1038/s41467-021-25845-4
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发表时间：
2021-09-22
影响因子：
16.6
通讯作者：
Lagoudakis PG
中科院分区：
文献类型：
--
作者：
Alyatkin S;Sigurdsson H;Askitopoulos A;Töpfer JD;Lagoudakis PG
最近建立的凝聚态物理范式之一是检查系统在人工势中的行为，从而深入了解难以到达的环境中的量子流体现象。一个突出的例子是物质波散射体晶格，其中高能物质波通过窄宽度屏障进行传输和反射，从而导致晶格带形成的严格相位匹配条件。与倏逝耦合晶格位点相比，宏观物质波流体的散射晶格的实现仍然难以捉摸。在这里，我们在散射体势的非厄米利布晶格中实现了激子-极化子凝聚系统。通过微调晶格参数，我们揭示了极化子凝聚的不同状态之间的非平衡相变：增益引导极化子凝聚在晶格势最大值上的散射晶格，以及俘获极化子凝聚在势最小值上。我们的结果为未探索的受限波和自由扩展波的非稳态混合物中的非厄米流体物理学铺平了道路。半导体微腔允许通过光学信息写入和读出来设计人造晶格。在这里，作者展示了排列在利布晶格中的激子极化子的光学印记系统，并揭示了从散射极化子凝聚体到俘获极化子凝聚体的非平衡转变。
One of the recently established paradigms in condensed matter physics is examining a system’s behaviour in artificial potentials, giving insight into phenomena of quantum fluids in hard-to-reach settings. A prominent example is the matter-wave scatterer lattice, where high energy matter waves undergo transmission and reflection through narrow width barriers leading to stringent phase matching conditions with lattice band formation. In contrast to evanescently coupled lattice sites, the realisation of a scatterer lattice for macroscopic matter-wave fluids has remained elusive. Here, we implement a system of exciton-polariton condensates in a non-Hermitian Lieb lattice of scatterer potentials. By fine tuning the lattice parameters, we reveal a nonequilibrium phase transition between distinct regimes of polariton condensation: a scatterer lattice of gain guided polaritons condensing on the lattice potential maxima, and trapped polaritons condensing in the potential minima. Our results pave the way towards unexplored physics of non-Hermitian fluids in non-stationary mixtures of confined and freely expanding waves. Semiconductor microcavities allow engineering of artificial lattices with optical write-in and read-out of information. Here, the authors show an optically imprinted system of exciton-polaritons arranged in a Lieb lattice and reveal a nonequilibrium transition from scattered- to trapped polariton condensates.
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影响因子：
16.6
作者：
Blanco-Redondo, A.;Husko, C.;Eades, D.;Zhang, Y.;Li, J.;Krauss, T. F.;Eggleton, B. J.
通讯作者：
Eggleton, B. J.
影响因子：
20.6
作者：
Kolkowski, Radoslaw;Koenderink, A. Femius
通讯作者：
Koenderink, A. Femius
影响因子：
8.6
作者：
Mandal, S.;Banerjee, R.;Liew, T. C. H.
通讯作者：
Liew, T. C. H.
影响因子：
3.7
作者：
Harder, Tristan H.;Egorov, Oleg A.;Klembt, Sebastian
通讯作者：
Klembt, Sebastian
影响因子：
3.7
作者：
Kajiwara, Sho;Urade, Yoshiro;Kitano, Masao
通讯作者：
Kitano, Masao