| Revue: | Revista mexicana de física |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000460766 |
| ISSN: | 0035-001X |
| Autores: | Rocha Rocha, O1 Gastélum Acuña, S1 Flores Acosta, M1 García Llamas, R1 |
| Instituciones: | 1Universidad de Sonora, Departamento de Investigación en Física, Hermosillo, Sonora. México 2Universidad Popular del Cesar, Departamento de Física, Valledupar, Cesar. Colombia |
| Año: | 2022 |
| Periodo: | May-Jun |
| Volumen: | 68 |
| Número: | 3 |
| País: | México |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Analítico, teórico |
| Resumen en inglés | 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 |
| Disciplinas: | Física y astronomía |
| Palabras clave: | Optica, Nanopartícula núcleo/cáscara, Sección transversal de dispersión, Límite cuasiestático, Frecuencias de resonancia |
| Keyword: | Optics, Core/shell nanoparticle, Scattering cross section, Quasi-static limit, Resonance frequencies |
| Texte intégral: | Texto completo (Ver HTML) Texto completo (Ver PDF) |
