Center for Metamaterials and Integrated Plasmonics, Duke University, Durham, North Carolina 27708, USA.
Opt Lett. 2013 May 15;38(10):1606-8. doi: 10.1364/OL.38.001606.
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 device does not require an immersion liquid or conducting ground planes for its operation. The dielectric constant of the polymer is low enough (ε=2.45) to suggest that this cloaking technique would be suitable for higher frequency radiation, including visible light.
我们报告了基于立体光刻聚合物的制造和微波 X 波段隐身装置的实验操作。该装置是一个相对较薄的（约一个波长厚）空气-电介质复合材料外壳，其中介电组件具有可忽略的损耗和色散。在有限的频带（9.7-10.1GHz）内，该外壳消除了阴影，并强烈抑制了 TE 极化自由空间平面波中六波长直径的导电圆柱的散射。该装置不需要浸液或导电接地板来操作。聚合物的介电常数足够低（ε=2.45），表明这种隐身技术将适用于更高频率的辐射，包括可见光。
