RLC Circuit Model for the Scattering of Light by Small Negative Refractive Index Spheres

Autor(es)

Ambrosio, Leonardo A. ^[1] ; Hernandez-Figueroa, Hugo E. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Sch Elect & Comp Engn, Dept Microwaves & Opt, BR-13083970 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: IEEE TRANSACTIONS ON NANOTECHNOLOGY; v. 11, n. 6, p. 1217-1222, NOV 2012.
• Citações Web of Science: 5

Resumo

We study the scattering properties of very small spheres made of a negative refractive index (NRI) using circuit network principles. The Lorenz-Mie theory is used to represent the transverse magnetic and transverse electric scattering coefficients based on resistor, inductor, and capacitor (RLC) ladder circuit models derived from continued fractions. The lumped elements are then analyzed and a comparison is made between these new elements and those expected for conventional positive refractive index spheres. This provides an alternative interpretation for the fact that the scattering efficiency Q(sca) for NRI spheres with size parameters x << 1 does not always obey Rayleigh's formula Q(sca) similar to x(4). The RLC circuits obtained here, besides being very simple, provide accurate physical insights into the problem of the scattering of light by NRI spheres, therefore serving as a new theoretical background for studying the scattering properties of negative refractive index metamaterials. (AU)

• Processo FAPESP: 05/51689-2 - Centro de Pesquisa em Óptica e Fotônica - UNICAMP (CEPOF-UNICAMP)
• Beneficiário: Hugo Luis Fragnito
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
• Processo FAPESP: 09/54494-9 - Viabilidade do uso de particulas metamateriais para manipulacao e aprisionamento opticos.
• Beneficiário: Leonardo Andre Ambrosio
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado