Zhang Qiang, Liu Zhenzhen, Qin Feifei, Zeng Shang Jie, Zhang Dasen, Gu Zhiyuan, Liu Xiangli, Xiao Jun-Jun
Opt Express. 2019 Mar 4;27(5):7009-7022. doi: 10.1364/OE.27.007009.
Recently, optical Skyrmion lattices (OSLs) have been realized in evanescent electromagnetic fields. OSLs possess topologically stable field configurations, which promise many optics and photonics applications. Here, we demonstrate that OSLs can serve as versatile structured optical near-fields to assist with studies of a variety of photonic modes in nanoparticles. We firstly show that OSL is capable of selectively exciting electric and magnetic multipole modes by placing a nanoparticle at different positions in the lattice. We then disclose that OSLs can efficiently excite some intriguing resonant modes, including toroidal and plasmonic dark modes, in dielectric or metal nanoparticles. Our results may enhance understanding of the interaction between OSLs and nanoparticles and find applications associated with precise control over resonant modes in nanostructures.
最近，光学斯格明子晶格（OSLs）已在倏逝电磁场中实现。OSLs具有拓扑稳定的场配置，有望应用于许多光学和光子学领域。在此，我们证明OSLs可作为通用的结构化光学近场，辅助研究纳米颗粒中的各种光子模式。我们首先表明，通过将纳米颗粒置于晶格中的不同位置，OSL能够选择性地激发电和磁多极模式。然后我们揭示，OSLs可以在介电或金属纳米颗粒中高效激发一些有趣的共振模式，包括环形和等离子体暗模式。我们的结果可能会增进对OSLs与纳米颗粒之间相互作用的理解，并找到与精确控制纳米结构中共振模式相关的应用。
