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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 3 — Feb. 4, 2008
  • pp: 2068–2079

Zero-backscatter cloak for aspherical particles using a generalized DDA formalism

Yu You, George W. Kattawar, Peng-Wang Zhai, and Ping Yang  »View Author Affiliations

Optics Express, Vol. 16, Issue 3, pp. 2068-2079 (2008)

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The Discrete Dipole Approximation (DDA) formalism has been generalized to materials with permeabilities µ ≠ 1 to study the scattering properties of impedance-matched aspherical particles and cloaked spheres. We have shown analytically that any impedance-matched particle with a four-fold rotational symmetry with respect to the direction of the incident radiation has the feature of zero backscatter. Moreover, an impedance-matched coat with the aforementioned symmetry property acting on an irregular dielectric particle with the same symmetry property can substantially reduce the backscatter. This leads to a substantial reduction of the signals from an object being detected by a monostatic radar/lidar system. The DDA simulation also provides accurate information about electric field distributions in the vicinity of a cloaked sphere.

© 2008 Optical Society of America

OCIS Codes
(290.1350) Scattering : Backscattering
(160.3918) Materials : Metamaterials
(280.1350) Remote sensing and sensors : Backscattering
(260.2710) Physical optics : Inhomogeneous optical media

ToC Category:

Original Manuscript: November 29, 2007
Revised Manuscript: January 24, 2008
Manuscript Accepted: January 29, 2008
Published: January 30, 2008

Yu You, George W. Kattawar, Peng-Wang Zhai, and Ping Yang, "Zero-backscatter cloak for aspherical particles using a generalized DDA formalism," Opt. Express 16, 2068-2079 (2008)

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