Physical-geometric optics method for large size faceted particles. Academic Article uri icon

abstract

  • A new physical-geometric optics method is developed to compute the single-scattering properties of faceted particles. It incorporates a general absorption vector to accurately account for inhomogeneous wave effects, and subsequently yields the relevant analytical formulas effective and computationally efficient for absorptive scattering particles. A bundle of rays incident on a certain facet can be traced as a single beam. For a beam incident on multiple facets, a systematic beam-splitting technique based on computer graphics is used to split the original beam into several sub-beams so that each sub-beam is incident only on an individual facet. The new beam-splitting technique significantly reduces the computational burden. The present physical-geometric optics method can be generalized to arbitrary faceted particles with either convex or concave shapes and with a homogeneous or an inhomogeneous (e.g., a particle with a core) composition. The single-scattering properties of irregular convex homogeneous and inhomogeneous hexahedra are simulated and compared to their counterparts from two other methods including a numerically rigorous method.

published proceedings

  • Opt Express

author list (cited authors)

  • Sun, B., Yang, P., Kattawar, G. W., & Zhang, X

citation count

  • 27

complete list of authors

  • Sun, Bingqiang||Yang, Ping||Kattawar, George W||Zhang, Xiaodong

publication date

  • September 2017