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Thin low-loss dielectric coatings for free-space cloaking
We report stereolithographic polymer-based fabrication and experimental operation of a microwave X-band cloaking device. The device is a relatively thin (about one wavelength thick) shell of an air-dielectric composite, in which the dielectric component has negligible loss and dispersion. In a finite band (9.7-10.1 GHz), the shell eliminates the shadow and strongly suppresses scattering from a conducting cylinder of six-wavelength diameter for TE-polarized free-space plane waves. The devicedoi:10.1364/ol.38.001606 pmid:23938884 fatcat:6x5qzxoagzbmhhi7mxxs23msry