Zero-backscatter cloak for aspherical particles using a generalized DDA formalism. Academic Article uri icon


  • The Discrete Dipole Approximation (DDA) formalism has been generalized to materials with permeabilities mu; not equal 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.

published proceedings

  • Opt Express

altmetric score

  • 3

author list (cited authors)

  • You, Y. u., Kattawar, G. W., Zhai, P., & Yang, P.

citation count

  • 15

complete list of authors

  • You, Yu||Kattawar, George W||Zhai, Peng-Wang||Yang, Ping

publication date

  • February 2008