Scattering of Bessel beam by a conducting spheroidal particle with dielectric coating

•The scattering of Bessel beam by a spheroid with dielectric coating is analytically studied for the first time•Beam shape coefficients of Bessel beam in spheroidal coordinate are firstly given.•Numerical results of the effect of some important parameters on the scattering are presented.

Based on the generalized Lorenz-Mie theory, an analytic solution to the scattering of an on-axis incident Bessel beam by a conducting spheroidal particle with dielectric coating is presented by expanding the incident beam, scattered fields and the fields in the dielectric coating in terms of spheroidal vector wave functions. In particular, the incident beam is represented using the vector expressions of zero-order Bessel beam that well satisfy Maxwell׳s equations. The unknown expansion coefficients for the scattered fields are determined by a system of linear equations derived from the appropriate boundary conditions. Numerical results of the differential scattering cross section are evaluated, and the scattering characteristics are discussed in detail.