Optically active quadrupole edge modes in arrays of flat metallic nanodisks

Optically active quadrupole edge modes in arrays of flat metallic nanodisks
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扁平金属纳米盘阵列中的光学活性四极边缘模式

DOI:
10.1088/2040-8986/abe451
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发表时间:
2021
期刊:
影响因子:
2.1
通讯作者:
Gutha, Rithvik R
Gutha, Rithvik R
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Sadeghi, Seyed M;Wing, Waylin J;Gutha, Rithvik R

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使用实验和模拟方法,我们证明了由紧密堆积的平面金属纳米盘的二维阵列组成的结构可以支持与暗边模式相关的光学活性集体共振。我们的研究结果表明,这种共振出现的折射率增加的覆盖层,产生一个相对尖锐的峰值与弱的敏感性的变化的环境。使用连续的多层沉积的硅阵列的顶部,我们映射这样的共振的发展,通过多步红移的瑞利异常波长。结果表明,当瑞利波长足够接近纳米盘的次辐射四极边缘模时,线偏振光可以激发这种模式,从而产生光学活性的集体共振.
Using experimental and simulation methods, we demonstrate that structures consisting of two-dimensional arrays of closely-packed flat metallic nanodisks can support optically active collective resonances associated with the dark edge modes. Our results show that such resonances appear as the refractive index of the superstrate increases, generating a relatively sharp peak with weak sensitivity to the variations of the environment. Using a consecutive multilayer deposition of Si on the top of the arrays we map the development of such a resonance via multi-step red shifting of the Rayleigh anomaly wavelength. The results show that when the Rayleigh wavelength is sufficiently close to the subradiant quadrupole edge modes of the nanodisks, a linearly polarized light can excite such modes, resulting in optically active collective resonance.
金属纳米天线阵列中的多阶表面晶格共振和暗模式激活
DOI: 10.1063/1.5051135
发表时间: 2019
影响因子: 3.2
作者:
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通讯作者: Yongbin Lin
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DOI: --
发表时间: 2017
期刊:
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DOI: 10.1021/acsphotonics.0c00110
发表时间: 2020-05-20
期刊: ACS PHOTONICS
影响因子: 7
作者:
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通讯作者: Botton, Gianluigi A.
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发表时间: 2018-04-05
影响因子: 3.7
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