Farooq Sajid, Shafique Shareen, Ahsan Zishan, Cardozo Olavo, Wali Faiz
Center for Lasers and Applications, Instituto de Pesquisas Energéticas e Nucleares, IPEN-CNEN Av. Prof. Lineu Prestes, 2242-Cidade Universitária, São Paulo 05508-000, Brazil.
Laboratory of Biomedical Optics and Imaging, Federal University of Pernambuco, Recife 50000-000, Brazil.
Nanomaterials (Basel). 2022 Aug 27;12(17):2962. doi: 10.3390/nano12172962.
Owing to the localized plasmon resonance of an ensemble of interacting plasmonic nanoparticles (NPs), there has been a tremendous drive to conceptualize complex optical nanocircuits with versatile functionalities. In comparison to modern research, there is still not a sufficient level of sophistication to treat the nanostructures as lumped circuits that can be adjusted into complex systems on the basis of a metatronic touchstone. Here, we present the design, assembly, and characterization of single relatively complex photonic nanocircuits by accurately positioning several metallic and dielectric nanoparticles acting as modular lumped elements. In this research, Au NPs along with silica NPs were used to compare the proficiency and precision of our lumped circuit model analytically. On increasing the size of an individual Au NP, the spectral peak resonance not only modifies but also causes more scattering efficiency which increases the fringe capacitance linearly and decreases the nanoinductance of lumped circuit element. The NPs-based assembly induced the required spectral resonance ascribed by simple circuit methods and are depicted to be actively reconfigurable by tuning the direction or polarization of input signals. Our work demonstrates a vital step toward developing the modern modular designing tools of complex electronic circuits into nanophotonic-related applications.
由于相互作用的等离子体纳米颗粒（NPs）集合的局部等离子体共振，人们一直大力推动将具有多功能的复杂光学纳米电路概念化。与现代研究相比，将纳米结构视为可以基于超材料试金石调整为复杂系统的集总电路，其复杂程度仍不够。在此，我们通过精确放置几个充当模块化集总元件的金属和介电纳米颗粒，展示了单个相对复杂的光子纳米电路的设计、组装和表征。在本研究中，使用金纳米颗粒和二氧化硅纳米颗粒来分析比较我们集总电路模型的熟练度和精度。随着单个金纳米颗粒尺寸的增加，光谱峰值共振不仅会改变，还会导致更高的散射效率，这会使边缘电容线性增加，并降低集总电路元件的纳米电感。基于纳米颗粒的组件通过简单的电路方法产生所需的光谱共振，并被描述为通过调整输入信号的方向或极化可实现主动重新配置。我们的工作朝着将复杂电子电路的现代模块化设计工具发展到纳米光子相关应用迈出了关键一步。
