 |
Journal articles
Off-shell mean-field electromagnetic T-matrix of finite-size spheres and fuzzy scatterers
Abstract : We introduce a method for computing simple energy-conserving model T-matrices intended for use in multiple-scattering formalisms. Our method is to make separable approximations to the physical scattering potentials. Such a ‘mean-field' approximation permits a ready analytic evaluation of the T-matrix for a variety of scatterers, even ‘fuzzy' scatterers (e.g. fractal aggregates). In the small-size limit, our method reduces to the point-like resonant T-matrix introduced by Nieuwenhuizen et al. in 1992 thereby demonstrating the intrinsic mean-field nature of their approximation. We discuss causality in both models and show that the separable potential model possesses a wider range of applicability than the point-like model does.
https://hal-cea.archives-ouvertes.fr/cea-00412636
Contributor : Yves-Patrick Pellegrini Connect in order to contact the contributor
Submitted on : Wednesday, September 2, 2009 - 12:45:53 PM
Last modification on : Tuesday, October 19, 2021 - 10:59:41 PM
Contributor : Yves-Patrick Pellegrini Connect in order to contact the contributor
Submitted on : Wednesday, September 2, 2009 - 12:45:53 PM
Last modification on : Tuesday, October 19, 2021 - 10:59:41 PM
Links full text
