Implementation of nondiffracting Bessel beam sources in FDTD for scattering by complex particles Article Swipe

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Finite-difference time-domain method Bessel beam Bessel function Optics Diffraction Scattering Beam (structure) Physics

Antao Chen , Jiajie Wang , Yiping Han , Zhiwei Cui , Mei-Ping Yu ·

YOU? · · 2018 · Open Access · · DOI: https://doi.org/10.1364/oe.26.026766 · OA: W2894461105

In this paper, the nondiffracting Bessel beam sources are implemented in finite-difference time-domain (FDTD) method. The high-order scattered-field algorithm of the FDTD (SF-FDTD (2, 4)) method is employed to investigate the scattering of particles illuminated by Bessel beams. In the SF-FDTD (2, 4) method, the scattered fields of the whole region are calculated directly by time stepping and the incident fields are obtained by the vector expressions of the diffraction-free Bessel beam. Some numerical results are included to illustrate the validity and capability of the proposed method. This study is expected to provide a new efficient method to investigate the interactions between nondiffracting beams and complex particles.