发表机构
Julius-Maximilians-Universität Würzburg; Leibniz Institute for Solid State and Materials Research (IFW Dresden)（维尔茨堡朱利叶斯-马克西米利安大学; 德累斯顿莱布尼兹固体与材料研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究利用1-十二醇封装的宏观WS$_2$单层实现毫米级均匀光学性质，在开放微腔中展示室温强耦合和kagome极化激元晶格，为可扩展极化激元带结构工程提供平台。
AI 中文摘要
大面积、光学均匀的单层半导体是实现可扩展室温极化激元学以及构建跨越多个晶胞的极化激元晶格的关键前提。然而，传统剥离薄片尺寸小、光学不均匀且器件间差异大，这些一直是主要障碍。在此，我们利用1-十二醇封装的WS$_2$单层克服了这些限制，该单层兼具毫米级覆盖范围和横向距离接近$300\\,$$\mu \mathrm{m}$的显著均匀光学性质。集成到可调谐开放微腔中后，这些单层表现出稳健的室温激子-光子强耦合，这通过明显的反交叉和约$\hbar \Omega_{\mathrm{R}} \approx 31\\,\mathrm{meV}$的拉比劈裂得到证实。利用该平台卓越的均匀性，我们实现了二维极化激元kagome晶格，并直接解析了其特征能带结构。角分辨光谱揭示了$s$带内的狄拉克色散带以及一条弱色散的类平带分支，与线性无相互作用模型吻合良好。互补的动量空间和实空间成像进一步识别了相关的键中心和位点中心模式分布。这些结果确立了开放微腔中的大面积WS$_2$单层作为在环境条件下工程化极化激元能带结构和探索合成量子材料的可扩展平台。
英文摘要
Large-area, optically homogeneous monolayer semiconductors are a critical prerequisite for scalable room-temperature polaritonics and for realizing polariton lattices extending across many unit cells. Yet, the small size, optical inhomogeneity, and device-to-device variability of conventional exfoliated flakes have remained major obstacles. Here, we overcome these limitations using 1-dodecanol-encapsulated WS$_2$ monolayers that combine millimeter-scale coverage with remarkably uniform optical properties over lateral distances approaching $300\,$$μ\mathrm{m}$. Integrated into a tunable open microcavity, these monolayers exhibit robust room-temperature exciton-photon strong coupling, evidenced by a pronounced anti-crossing and a Rabi splitting of $\hbar Ω_{\mathrm{R}} \approx 31\,\mathrm{meV}$. Leveraging the exceptional uniformity of this platform, we realize a two-dimensional polaritonic kagome lattice and directly resolve its characteristic band structure. Angle-resolved spectroscopy reveals Dirac dispersive bands together with a weakly dispersive flat-band-like branch within the $s$-band, in good agreement with a linear non-interacting model. Complementary momentum- and real-space imaging further identifies the associated bond-centered and site-centered mode profiles. These results establish large-area WS$_2$ monolayers in open microcavities as a scalable platform for engineering polariton band structures and exploring synthetic quantum materials under ambient conditions.
Comments12 pages, 4 figures, 1 Supplementary Information
