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Analysis of Dielectric Properties of Inhomogeneous Anisotropic Dye-Coated Nanoparticles

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Abstract

In this paper, the effective permittivity of inhomogeneous anisotropic dye-coated nanoparticles is calculated and compared using the internal homogenization method and the electric field-weighted averaging method. The relative errors of the two effective medium methods are analyzed by comparing the calculated absorption factors with those calculated by the original model. The filling factor, core size, material, and anisotropy degree of the dye molecular layer are considered, and the results showed good agreement for larger filling factor, smaller core radius, and radial dielectric constant of the shell. The highest reliability of the effective permittivity predicted by the two methods is achieved when the filling factor, core radius, and radial dielectric constant are 0.8, 15 nm, and 4, respectively. In general, the accuracy of the homogenization method within the studied wave band is higher than that of the electric field-weighted averaging method, but the electric field-weighted averaging method can be applied to anisotropic medium with arbitrary morphology, which provides a new idea for calculating the dielectric properties of inhomogeneous anisotropic medium.

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Data Availability

The datasets analyzed during the current study are available from the corresponding author on reasonable request.

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Funding

This work was supported by Natural Science Foundation of China (Grant numbers 51476078).

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Authors and Affiliations

  1. MIIT Key Laboratory of Thermal Control of Electronic Equipment, School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China

    Cong Sun & Jiayu Li

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  1. Cong Sun
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  2. Jiayu Li
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Contributions

Cong Sun: methodology, simulation, and writing—original draft. Li Jiayu: conceptualization, methodology, analysis, and writing—review.

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Correspondence to Jiayu Li.

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Sun, C., Li, J. Analysis of Dielectric Properties of Inhomogeneous Anisotropic Dye-Coated Nanoparticles. Plasmonics 19, 287–300 (2024). https://doi.org/10.1007/s11468-023-01964-0

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