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

Author(s)

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

Affiliation

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

• Document type: Journal article
• Source: JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION; v. 27, n. 7, p. 1679-1687, JUL 2010.
• Web of Science Citations: 8

Abstract

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)

• FAPESP's process: 08/02069-0 - Electromagnetic wave scattering by magnetic spheres and cylinders: waves confinement and transport in the small particle limit and independence of the stored energy with respect to the shape of the scatterer
• Grantee: Tiago José Arruda
• Support Opportunities: Scholarships in Brazil - Master