Continuous amplitude control of second harmonic waves from the metasurfaces through interference paths
Continuous amplitude control of second harmonic waves from the metasurfaces through interference paths
复制标题
通过干涉路径对来自超表面的二次谐波进行连续幅度控制
DOI：
10.1063/5.0105386
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发表时间：
2022-09
影响因子：
4
通讯作者：
Guixin Li
中科院分区：
文献类型：
--
作者：
Xuan Liu;Yutao Tang;Yang Li;Zixian Hu;Junhong Deng;Guixin Li
非线性等离子体超颖表面代表了用于在亚波长尺度上产生和控制多个自由度的谐波的有前途的平台。在各种功能中，谐波的幅度控制通常通过改变基频和泵浦功率来实现。然而，这类方法缺乏控制不同衍射级的非线性波的能量分布的能力。在这里，我们报告的连续强度控制的谐波从等离子体超颖表面通过干涉路径。超颖表面由具有三重旋转对称性的几何相位控制的金超原子组成。通过控制两个相邻超颖表面路径的相对相位，可以人为地调制衍射的二次谐波的强度。我们的研究结果表明，传统的干涉技术代表了一个强大的途径来控制的非线性波的辐射从亚波长的亚原子，并可能有很大的应用在发展超紧凑的非线性光源。
Nonlinear plasmonic metasurfaces represent a promising platform for generating and controlling the multiple degrees of freedom of harmonic waves at the subwavelength scale. Among various functionalities, the amplitude control of the harmonic waves is usually achieved by varying the fundamental frequency and the pumping power. However, these kinds of methods lack the ability to control the energy distributions of the nonlinear waves at different diffraction orders. Here, we report the continuous intensity control of the harmonic waves from the plasmonic metasurfaces through interference paths. The metasurfaces consist of geometric phase controlled gold meta-atoms with threefold rotational symmetry. By controlling the relative phase of two neighboring metasurface paths, the intensity of the diffracted second harmonic waves can be artificially modulated. Our findings suggest that the conventional interference technique represents a powerful route for controlling the radiation of the nonlinear waves from sub-wavelength meta-atoms and may have great applications in developing ultra-compact nonlinear optical sources.
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影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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