Scattering of Bessel beam by arbitrarily shaped composite particles with core-shell structure

- The scattering of Bessel beam by composite particles is numerically investigated.
- A detailed description of the arbitrarily incident Bessel beam is presented.
- The surface integral equation method is used to solve the studied scattering problem.
- The numerical results of several typical composite particles are presented.

This study investigates the scattering of Bessel beam by composite particles with core-shell structure. Specifically, the vector expressions of zero-th order Bessel beam that satisfy well Maxwell׳s equations in combination with the rotation Euler angles are used to represent the arbitrarily incident Bessel beams. An efficient numerical method based on surface integral equations is introduced to formulate the scattering problems involving arbitrarily shaped composite particles with core-shell structure. Solutions are performed iteratively by using the multilevel fast multipole algorithm. The numerical results for differential scattering cross sections of several selected composite particles are presented and analyzed. This investigation is expected to provide useful guidance for techniques of laser detection on particle, diagnosis, and manipulation.