Reconfigurable Near‐field Enhancement with Hybrid Metal‐Dielectric Oligomers,Laser & Photonics Reviews

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Reconfigurable Near‐field Enhancement with Hybrid Metal‐Dielectric Oligomers
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2019-01-02 , DOI: 10.1002/lpor.201800274
Yali Sun ₁ , Ivan Sinev ₁ , Anastasia Zalogina ₁ , Eduard Ageev ₁ , Hadi Shamkhi ₁ , Filipp Komissarenko ₁ , Ivan Morozov ₂ , Sergey Lepeshov ₁ , Valentin Milichko ₁ , Sergey Makarov ₁ , Ivan Mukhin _{1,

2} , Dmitry Zuev ₁

Affiliation

Tailoring of the near‐field properties of the nanostructures is a significant task for the control of radiation of nanoscale light sources as well as for sensing applications. Generally, this task is solved in plasmonic oligomers on the fabrication step by the choice of geometry or by controlling the excitation light during the experiments. Here, the pronounced modification of the near‐field pattern in hybrid gold‐silicon oligomers by femtosecond laser reshaping by visualizing it with aperture‐type near‐field optical microscope is demonstrated. This effect correlates with a moderate red‐shift of the broadband magnetic dipole resonance of the structure that occurs upon reshaping the gold component of the oligomers. The proposed all‐optical near‐field reconfiguration approach makes hybrid oligomers a promising platform for on‐demand engineering of local field enhancement in metadevices for data recording and sensing.

中文翻译：

混合金属介电低聚物可重构的近场增强

调整纳米结构的近场特性是控制纳米级光源辐射以及传感应用的一项重要任务。通常，通过选择几何形状或通过在实验过程中控制激发光，可以在制造步骤的等离子体低聚物中解决此任务。在此，通过飞秒激光重塑（通过使用孔径型近场光学显微镜对其进行可视化），证明了混合金-硅低聚物中近场图案的显着改变。这种效应与在重整低聚物的金组分时发生的结构的宽带磁偶极子共振的适度红移有关。

更新日期：2019-01-02

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