Efficient directional forward scattering by a single Cu@Si core-shell nanoparticle in visible regions
Efficient directional forward scattering by a single Cu@Si core-shell nanoparticle in visible regions
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DOI：
10.1016/j.optmat.2024.114895
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发表时间：
2024-01-23
影响因子：
3.9
通讯作者：
Gao，Min
中科院分区：
文献类型：
--
作者：
Batelbek，Hmbat;Abadula，Rukeyemuhan;Gao，Min
在纳米尺度上对光辐射的有效控制已经在纳米天线、传感器和发光器件中引起了相当大的兴趣。基于Mie理论和Kerker条件，我们在理论上实现了单个Cu@Si核壳纳米粒子在可见光区的定向前向散射。重要的是，高阶电和磁四极子对定向散射的贡献超过了传统的偶极模式，已通过电磁散射的多极分析证明。此外，通过优化结构参数，如核半径的大小和外壳的厚度，可以很容易地设计方向性。这些发现为设计能够实现信号增强、操纵和定向传输的结构提供了指导。
Efficient control of optical radiation at nanoscale dimensions have attracted considerable interests in nano antennas, sensors, and light-emitting devices. Herein, based on Mie theory and the Kerker condition, we have theoretically achieved directional forward scatterings realized through a single Cu@Si core-shell nanoparticle in visible regions. Importantly, the contributions of high-order electric and magnetic quadrupoles on directional scatterings beyond conventional dipolar modes have been demonstrated through multipole analysis of electromagnetic scattering. Moreover, by optimizing the structural parameters, such as the size of the core radius and the thickness of the shell, the directivity can be engineered readily. These findings provide guidance for designing structures capable of achieving signal enhancement, manipulation, and directional transmission.