Analysis of the enhancement of backscattering by nonspherical particles with flat surfaces

Suginori Iwasaki, Hajime Okamoto

研究成果: Contribution to journalArticle査読

24 被引用数 (Scopus)

抄録

We examine backscattering by analyzing large nonspherical particles with flat surfaces for which where the size is much larger than the wavelength, using ray optics and diffraction theory. We show that the backscattering cross section for rectangles can be 1 order of magnitude larger than that for spheres with same geometrical cross sections, depending on the orientation of the particles. Then we show that there is a difficulty in estimating the backscattering cross section for hexagonal columns with the available solutions but that it is possible to estimate the integration of the differential scattering cross section over small solid angles in backward directions. The integral values for hexagonal columns are found to be more than 1 order of magnitude larger than that for spheres with the same volume. As an application, the use of power from hexagonal columns for lidar observations is analyzed. Unlike for spherical particles with their dependence on Z-2 (where Z is the distance between the particle and the detector), for nonspherical particles such dependence varies with the particles’ nonsphericity, such as shape and orientation: Z0 for a hexagonal plate randomly oriented in the horizontal plane; Zx1 for a hexagonal column randomly oriented in the horizontal plane.

本文言語英語
ページ(範囲)6121-6129
ページ数9
ジャーナルApplied Optics
40
33
DOI
出版ステータス出版済み - 11 20 2001
外部発表はい

All Science Journal Classification (ASJC) codes

  • 原子分子物理学および光学
  • 工学(その他)
  • 電子工学および電気工学

フィンガープリント

「Analysis of the enhancement of backscattering by nonspherical particles with flat surfaces」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル