Electromagnetic energy within a magnetic infinite cylinder and scattering properties for oblique incidence

Autor(es)

Arruda, Tiago Jose ^[1] ; Martinez, Alexandre Souto ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Natl Inst Sci & Technol Complex Syst, Fac Filosofia Ciencias & Letras Ribeirao Preto, BR-14040901 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION; v. 27, n. 7, p. 1679-1687, JUL 2010.
• Citações Web of Science: 8

Resumo

We analytically calculate the time-averaged electromagnetic energy stored inside a nondispersive magnetic isotropic cylinder that is obliquely irradiated by an electromagnetic plane wave. An expression for the optical-absorption efficiency in terms of the magnetic internal coefficients is also obtained. In the low absorption limit, we derive a relation between the normalized internal energy and the optical-absorption efficiency that is not affected by the magnetism and the incidence angle. This relation, indeed, seems to be independent of the shape of the scatterer. This universal aspect of the internal energy is connected to the transport velocity and consequently to the diffusion coefficient in the multiple scattering regime. Magnetism favors high internal energy for low size parameter cylinders, which leads to a low diffusion coefficient for electromagnetic propagation in 2D random media. (C) 2010 Optical Society of America (AU)

• Processo FAPESP: 08/02069-0 - Espalhamento de ondas eletromagnéticas por esferas e cilindros magnéticos: confinamento e transporte de ondas no limite de pequenas partículas e independência da energia armazenada com relação à forma do centro espalhador
• Beneficiário: Tiago José Arruda
• Modalidade de apoio: Bolsas no Brasil - Mestrado