扭曲向列等离子体超晶格中的相关等离子体激发
Correlated Plasmonic Excitation in Twisted Nematic Plasmonic Superlattices
浏览论文内容
中文总结 AI 辅助
研究扭曲向列等离子体超晶格中光与物质相互作用，以混合纳米棒为单元组装超晶格，发现扭曲双层中与扭曲角相关的等离子体激发，由液晶相集体极化与纳米棒各向异性激发的相关性引起，可产生可重构光子莫尔超晶格。
中文摘要 AI 辅助
具有扭曲构型的超晶格，如莫尔晶格，因其独特的电子、磁和光学性质，近来得到广泛研究。纳米级扭曲超晶格的一个显著特征是独特的晶格对称性以及周期性或非周期性相之间的连续相变，这为研究许多新出现的物理现象提供了独特机会。本文报道了在可重构扭曲等离子体超晶格中，向列等离子体超结构的集体极化效应与单个组成纳米棒的等离子体激发之间的相关光与物质相互作用。我们以混合的Fe3O4和Au纳米棒为构建单元，组装了纳米棒单向排列的等离子体向列液晶，通过垂直堆叠组装方法进一步组装成莫尔等离子体晶格。在两个等离子体超晶格的扭曲双层中识别出了与扭曲角相关的等离子体激发，分别在扭曲角为0度和90度时增强了横向和纵向等离子体激发。这种扭曲等离子体超结构中的相关等离子体激发是由液晶相的集体极化效应与单个纳米棒的各向异性等离子体激发之间的相关性引起的。磁取向控制允许在聚合物衬底中精确排列混合的Fe3O4和Au纳米棒，并能够对每个子晶格中的向列畴和等离子体图案进行编码。相关的等离子体激发和光极化产生了具有明确定义的畴颜色、特征尺寸、周期性、对称性和尺寸的可重构光子莫尔超晶格，这些由扭曲等离子体晶格中的扭曲角和位移决定。
英文摘要
Superlattices with twisted configurations, such as moire lattices, have recently been extensively exploited for their unique electronic, magnetic, and optical properties. One remarkable feature of nanoscale twisted superlattices is the distinct lattice symmetries and the continuous phase transitions between periodic or aperiodic phases, representing a unique opportunity to study many emerging physical phenomena. Here, we report a correlated light and matter interaction between the collective polarization effect of nematic plasmonic superstructures and the plasmonic excitation of individual constituent nanorods in reconfigurable twisted plasmonic superlattices. Using hybrid Fe3O4 and Au nanorods as building blocks, we assembled plasmonic nematic liquid crystals with unidirectionally aligned nanorods, which could be further assembled into moire plasmonic lattices through a vertical stacking assembly method. A twist angle dependent plasmonic excitation is recognized in the twisted bilayer of two plasmonic superlattices, featuring enhanced transverse and longitudinal plasmonic excitation at a twisting angle of 0 degree and 90 degree, respectively. Such correlated plasmonic excitation in twisted plasmonic superstructures is induced by the correlation between the collective polarization effect of the liquid crystal phases and the anisotropic plasmonic excitation of individual nanorods. The magnetic orientation control allows for precise alignment of hybrid Fe3O4 and Au nanorods in polymer substrates and enables the coding of nematic domains and plasmonic patterns in each sublattice. The correlated plasmonic excitation and light polarization create reconfigurable photonic moire superlattices with well-defined domain colors, feature sizes, periodicities, symmetries, and dimensions determined by twist angles and displacements in the twisted plasmonic lattices.
