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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Franco Gori
  • Vol. 30, Iss. 8 — Aug. 1, 2013
  • pp: 1661–1669

Electromagnetic scattering by a uniaxial anisotropic sphere located in an off-axis Bessel beam

Tan Qu, Zhen-Sen Wu, Qing-Chao Shang, Zheng-Jun Li, and Lu Bai  »View Author Affiliations


JOSA A, Vol. 30, Issue 8, pp. 1661-1669 (2013)
http://dx.doi.org/10.1364/JOSAA.30.001661


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Abstract

Electromagnetic scattering of a zero-order Bessel beam by an anisotropic spherical particle in the off-axis configuration is investigated. Based on the spherical vector wave functions, the expansion expression of the zero-order Bessel beam is derived, and its convergence is numerically discussed in detail. Utilizing the tangential continuity of the electromagnetic fields, the expressions of scattering coefficients are given. The effects of the conical angle of the wave vector components of the zero-order Bessel beam, the ratio of the radius of the sphere to the central spot radius of the zero-order Bessel beam, the shift of the beam waist center position along both the x and y axes, the permittivity and permeability tensor elements, and the loss of the sphere on the radar cross section (RCS) are numerically analyzed. It is revealed that the maximum RCS appears in the conical direction or neighboring direction when the sphere is illuminated by a zero-order Bessel beam. Furthermore, the RCS will decrease and the symmetry is broken with the shift of the beam waist center.

© 2013 Optical Society of America

OCIS Codes
(140.3430) Lasers and laser optics : Laser theory
(160.1190) Materials : Anisotropic optical materials
(290.5850) Scattering : Scattering, particles

ToC Category:
Scattering

History
Original Manuscript: April 17, 2013
Revised Manuscript: July 1, 2013
Manuscript Accepted: July 1, 2013
Published: July 24, 2013

Citation
Tan Qu, Zhen-Sen Wu, Qing-Chao Shang, Zheng-Jun Li, and Lu Bai, "Electromagnetic scattering by a uniaxial anisotropic sphere located in an off-axis Bessel beam," J. Opt. Soc. Am. A 30, 1661-1669 (2013)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-30-8-1661

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