Optical response of dielectric&metal-core/metal-shell nanoparticles: Near electromagnetic field and resonance frequencies
| العنوان: | Optical response of dielectric&metal-core/metal-shell nanoparticles: Near electromagnetic field and resonance frequencies |
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| المؤلفون: | Osnaider Rocha Rocha, S. Gastélum-Acuña, M. Flores-Acosta, R. García-Llamas |
| المصدر: | Revista Mexicana de Física. 68 |
| بيانات النشر: | Sociedad Mexicana de Fisica A C, 2022. |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | Physics::Optics, General Physics and Astronomy, Education |
| الوصف: | We study the diffraction of a monochromatic electromagnetic plane wave by a dielectric&metal-core/metal-shell nanoparticle surrounded by a dielectric medium. This problem was solved by using generalized Mie’s theory and both the scattering cross section and the square module of the electric field were calculated as a function of shell thickness. Numerically, the first particles studied were gold-core/silver-shell nanoparticles and their inverse configuration. The gold-core/silver-shell particle presented more variation of their optical properties. The second particles were vacuum-core/metal-shell surrounded by vacuum, symmetric configurations. In this case, the dispersive Drude dielectric function for the metal was used, and a comparative study between the positions of the resonance frequencies obtained from quasi-static limit and electrodynamic theory was performed. Thus, consequently the formula obtained from the quasi-static limit can be used to calculate the positions of the resonance frequencies instead of the electrodynamic theory, when the external radius is smaller than 20 nm. |
| تدمد: | 2683-2224 0035-001X |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::7f9bea96ac4275498b3a6e9fd7fd665c https://doi.org/10.31349/revmexfis.68.031302 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi...........7f9bea96ac4275498b3a6e9fd7fd665c |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 26832224 0035001X |
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