Zero-backscatter cloak for aspherical particles using a generalized DDA formalism
Optics Express, Vol. 16, Issue 3, pp. 2068-2079 (2008)
http://dx.doi.org/10.1364/OE.16.002068
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Abstract
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:
Scattering
History
Original Manuscript: November 29, 2007
Revised Manuscript: January 24, 2008
Manuscript Accepted: January 29, 2008
Published: January 30, 2008
Citation
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)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-3-2068
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