环向电偶极子使立体螺旋桨超表面的手性表面晶格共振

IF 5.4 1区 物理与天体物理 Q1 OPTICS
APL Photonics Pub Date : 2023-08-01 DOI:10.1063/5.0158261
Qinglan Ling, Qinghua Liang, Xiaochen Zhang, Honglian Guo, Shuai Feng, Chang-Yin Ji, Jiafang Li
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引用次数: 0

摘要

表面晶格共振(SLRs)是周期性排列的纳米粒子之间的相干集体相互作用,通常被认为是由单个纳米粒子的共振电偶极子、磁偶极子或电四极矩与瑞利异常(RA)耦合形成的。本文通过理论设计和实验制备纳米基里米螺旋桨超表面,首次观察到手性环面电偶极子(TED)矩与RA模耦合形成的手性单反。通过对螺旋桨旋转对称的改造,例如从C2 (C3)对称到C4对称,我们发现电偶极子(电四极子)手性单反已经演变成TED相关的手性单反。此外,还发现可以通过控制螺旋桨的立体扭曲高度和入射光的自旋来定制TED力矩的激发幅度。最后,在近红外波段验证了手性TED矩增强的圆二色性。我们的研究提供了一种有效而简单的方法来操纵依赖于TED的手性单反,为探索TED的非常规物理性质和先进的手性物理铺平了道路。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Toroidal electric dipole enabled chiral surface lattice resonances in stereo propeller metasurfaces
Surface lattice resonances (SLRs) are the coherent collective interactions between periodically arranged nanoparticles, which are generally considered to be formed by the resonant electric dipole, magnetic dipole, or electric quadrupole moments of a single nanoparticle coupled with the Rayleigh anomaly (RA). Here we reveal the first observation of the chiral SLRs that are formed by the coupling of the chiral toroidal electric dipole (TED) moment and RA mode through the theoretical design and experimental fabrication of a nano-kirigami based propeller metasurface. By engineering the rotational symmetry of the propeller, e.g., from C2 (C3) symmetry to C4 symmetry, we find that the electric dipole (electric quadrupolar) chiral SLRs have evolved into the TED associated chiral SLRs. Furthermore, it is found that the excitation amplitude of the TED moment can be tailored by controlling the stereo twisted height of the propeller and the spin of the incident light. Finally, the chiral TED moment enhanced circular dichroism is verified in the near-infrared wavelength region. Our study provides an effective yet simple scheme to manipulate the TED-dependent chiral SLRs, paving the way toward exploring the unconventional physical properties of TED and advanced chiroptical physics.
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来源期刊
APL Photonics
APL Photonics Physics and Astronomy-Atomic and Molecular Physics, and Optics
CiteScore
10.30
自引率
3.60%
发文量
107
审稿时长
19 weeks
期刊介绍: APL Photonics is the new dedicated home for open access multidisciplinary research from and for the photonics community. The journal publishes fundamental and applied results that significantly advance the knowledge in photonics across physics, chemistry, biology and materials science.
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