Scattering of an electromagnetic beam by a radially inhomogeneous sphere

Proceedings of the Seventeenth National Radio Science Conference. 17th NRSC'2000 (IEEE Cat. No.00EX396) Pub Date : 2000-02-22 DOI:10.1109/NRSC.2000.838841

E. Khaled, M. Salem

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引用次数: 1

Abstract

A method to calculate the scattering intensities of a multilayered sphere or a radially inhomogeneous sphere is presented. The sphere is illuminated with an electromagnetic wave of an arbitrary spatial distribution. The radially inhomogeneous sphere is modeled by a multilayered sphere. The method uses the technique presented by Wu and Wang (1991) and by Johnson (see Appl. Opt., vol.35, p.3285-96, 1996) to calculate the scattering coefficients of a multilayered sphere and a method that represent an arbitrary incident beam in terms of vector spherical harmonics (VSH). The presented method is used to calculate the backscattered and angular scattering intensities of a multilayered and a radially inhomogeneous spheres illuminated with a Gaussian beam. The method is capable of calculating the scattered field of any scatterer as long as its scattering coefficients are known. Also the method can be used for a tightly focused incident beam. The beam can be focused to an arbitrary position with respect to the sphere.

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辐射状非均匀球体对电磁波束的散射

提出了一种计算多层球和径向非均匀球散射强度的方法。用任意空间分布的电磁波照射球体。径向非均匀球是用多层球来模拟的。该方法使用Wu和Wang(1991)以及Johnson(见Appl。光学学报，vol.35, p.3285-96, 1996)计算多层球的散射系数和用矢量球谐波(VSH)表示任意入射光束的方法。用该方法计算了高斯光束照射下多层球和径向非均匀球的后向散射和角散射强度。该方法能够计算出任何散射体的散射场，只要它的散射系数已知。该方法也可用于紧聚焦入射光束。光束可以聚焦到相对于球体的任意位置。

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Proceedings of the Seventeenth National Radio Science Conference. 17th NRSC'2000 (IEEE Cat. No.00EX396)

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