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<p>Ag@SiO<sub>2</sub> polymer structure model is established with the assistance of COMSOL software. The effects of SiO<sub>2</sub>-free layer configuration and different SiO<sub>2</sub> thickness on the electric field distribution, absorption spectrum, and far-field radiation in the gap of different Ag nanostructures were calculated the simulation results demonstrate that the Ag@SiO<sub>2</sub> polymer structure exhibits two plasmon resonance modes: low energy and high energy. With an increase in SiO<sub>2</sub> thickness, the high energy mode is redshifted, while the low energy mode is blue shifted, and the peak of the absorption spectrum changes with the thickness of the SiO<sub>2</sub> layer. The alteration of the tetramer configuration enables the attainment of an octupole&#xa0;resonance mode, giving rise to a novel resonance absorption peak within the wavelength range of 400 to 500&#xa0;nm. The maximum peak offset observed is 82&#xa0;nm, a phenomenon that results in the broadening of the polymer's absorption spectrum range. This development provides a solid theoretical foundation for high-wavelength resonance coupling.</p>

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Localized Surface Plasmon Resonance of Ag-SiO2 Core–Shell Nanowire Tetramers

  • 期刊论文

  • 发表日期：

    2025年2月3日

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  • Jijun Ding,
  • Ziyang Liu,
  • Wenkai Li,
  • Caiwang Yin,
  • Haixia Chen

摘要

Ag@SiO2 polymer structure model is established with the assistance of COMSOL software. The effects of SiO2-free layer configuration and different SiO2 thickness on the electric field distribution, absorption spectrum, and far-field radiation in the gap of different Ag nanostructures were calculated the simulation results demonstrate that the Ag@SiO2 polymer structure exhibits two plasmon resonance modes: low energy and high energy. With an increase in SiO2 thickness, the high energy mode is redshifted, while the low energy mode is blue shifted, and the peak of the absorption spectrum changes with the thickness of the SiO2 layer. The alteration of the tetramer configuration enables the attainment of an octupole resonance mode, giving rise to a novel resonance absorption peak within the wavelength range of 400 to 500 nm. The maximum peak offset observed is 82 nm, a phenomenon that results in the broadening of the polymer's absorption spectrum range. This development provides a solid theoretical foundation for high-wavelength resonance coupling.