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Chiral Plasmonic Nanostructure of Twistedly-Stacked Nanogaps [Early Posting]

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摘要

Nanogap plasmonic structures with strong coupling between separated components have different responses to orthogonal polarized light, giving rise to giant optical chirality. Here, we proposed a 3D nanostructure consists of two vertically and twistedly aligned nanogaps, showing the hybridized charge distribution within 3D structures. It is discovered that the structure twisted with 60<sup>o</sup> performs plasmonic coupling behaviour with/without gap mode for different circular-polarized plane waves, showing giant chiral response (ΔT) of 60% at the wavelength of 1550 nm. By controlling the disk radius and the insulator layer, the CD signal can be further tuned between 1538~1626 nm.

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作者单位:

    Hangzhou Dianzi University
    Hangzhou Dianzi University
    Hangzhou Dianzi University
    Hangzhou Dianzi University
    Hangzhou Dianzi University
    Nanjing University
    Hangzhou Dianzi University

引用该论文

Zhang Jian,Tu Rui,Huang Chao,Yao Xiaoli,Hu Xin,Ge Haixiong,Zhang Xuefeng. Chiral Plasmonic Nanostructure of Twistedly-Stacked Nanogaps[J].Chinese Optics Letters,2021,19(1):01.