| Autor: |
Sun B, Yang P, Kattawar GW, Zhang X |
| Jazyk: |
angličtina |
| Zdroj: |
Optics express [Opt Express] 2017 Oct 02; Vol. 25 (20), pp. 24044-24060. |
| DOI: |
10.1364/OE.25.024044 |
| Abstrakt: |
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. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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