You, YuKattawar, George W.Zhai, Peng-WangYang, Ping2022-06-172022-06-172008-01-30Yu 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)https://doi.org/10.1364/OE.16.002068http://hdl.handle.net/11603/24979The 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.12 pagesen-USThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.Text