Electromagnetic energy within single-resonance chiral metamaterial spheres

Autor(es)

Arruda, Tiago J. ^[1] ; Pinheiro, Felipe A. ^[2] ; Martinez, Alexandre S. ^{[1, 3]}

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Fac Filosofia Ciencias & Letras Ribeirao Preto, BR-14040901 Ribeirao Preto, SP - Brazil

^[2] Univ Fed Rio de Janeiro, Inst Fis, BR-21941972 Rio De Janeiro - Brazil

^[3] Natl Inst Sci & Technol Complex Syst, BR-22290180 Rio De Janeiro - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION; v. 30, n. 6, p. 1205-1212, JUN 2013.
• Citações Web of Science: 4

Resumo

We derive an exact expression for the time-averaged electromagnetic (EM) energy inside a chiral dispersive sphere irradiated by a plane wave. The dispersion relations correspond to a chiral metamaterial consisting of uncoupled single-resonance helical resonators. Using a field decomposition scheme and a general expression for the EM energy density in bianisotropic media, we calculate the Lorenz-Mie solution for the internal fields in a medium that is simultaneously magnetic and chiral. We also obtain an explicit analytical relation between the internal EM energy and the absorption cross section. This result is applied to demonstrate that strong chirality leads to an off-resonance field enhancement within weakly absorbing spheres. (c) 2013 Optical Society of America (AU)

• Processo FAPESP: 10/10052-0 - Energia interna e espalhamento de ondas eletromagnéticas por esferas ou cilindros: ressonâncias de Fano e suas aplicações a metamateriais
• Beneficiário: Tiago José Arruda
• Modalidade de apoio: Bolsas no Brasil - Doutorado