Near-Field Imaging of Phased Array Metasurfaces

详细信息    查看全文

• 作者：Bernhard J. Bohn ; Martin Schnell ; Mikhail A. Kats ; Francesco Aieta ; Rainer Hillenbrand ; Federico Capasso
• 刊名：Nano Letters
• 出版年：2015
• 出版时间：June 10, 2015
• 年：2015
• 卷：15
• 期：6
• 页码：3851-3858
• 全文大小：487K
• ISSN：1530-6992

文摘

Phased-antenna metasurfaces can impart abrupt, spatially dependent changes to the amplitude, phase, and polarization of light and thus mold wavefronts in a desired fashion. Here we present an experimental and computational near-field study of metasurfaces based on near-resonant V-shaped antennas and connect their near- and far-field optical responses. We show that far fields can be obtained from limited, experimentally obtained knowledge of the near fields, paving the way for experimental near-field characterization of metasurfaces and other optical nanostructures and prediction of their far fields from the near-field measurements.