Fig. 1. Relative permittivity, scattered fields, total fields, and scattered intensity for a 0.5λ radius metal rod with (a) no cloak, (b) optimized 0.5λ thick cloak for an initial seed of ϵshell=3, and (c) optimized 0.5λ thick cloak for an initial seed of ϵshell=5.

Fig. 2. Relative permittivity, scattered fields, total fields, and scattered intensity for a 0.5λ radius metal rod with (a) no cloak, (b) optimized 0.25λ thick cloak for an initial seed of ϵshell=3, and (c) optimized 0.25λ thick cloak for an initial seed of ϵshell=5.

Fig. 3. Relative permittivity, scattered fields, total fields, and scattered intensity for an elliptical metal rod with 0.8λ and 0.4λ major and minor axes, respectively, with (a) no cloak, (b) optimized 0.2λ thick cloak for an initial seed of ϵshell=3, and (c) optimized 0.2λ thick cloak for an initial seed of ϵshell=5.

Fig. 4. Cross section of the uncloaked structure in Fig. 1(a) and the optimized cloak in Fig. 1(b) as a function of (a) wavelength and (b) angle of incidence.