物理学报Issue(9)：1-7,7.DOI:10.7498/aps.64.094101
二维宽带相位梯度超表面设计及实验验证∗
Design and verification of a two-dimensional wide band phase-gradient meta-surface
摘要
Abstract
For dealing with circularly polarized waves, a high-efficient two-dimensional dispersionless phase-gradient meta-surface is devised and achieved by spatially arranging co-polarized reflective metasurface unit cells. The phase of the co-polarized reflection can be freely modulated via a rotating metallic wire of the co-polarized reflective metasurface unit cell in-plane. The achieved phase gradient metasurface can produce opposite-sign phase gradient for left-and right-handed circularly polarized incident waves. During linearly polarized wave incidence, the reflected waves will decompose into two counter-directionally propagating circularly polarized waves. Reflective power density spectra for the linearly polarized wave in normal incidence are simulated, which are well consistent with the theoretically designed anomalous reflection direction. A 2 mm thick sample is fabricated and the mirror reflectivity curve is measured. Experimental results show that for linearly polarized wave normal incidence, the mirror reflectivity is reduced to below −5 dB in a wide band from 9.5 to 17.0 GHz.关键词
极化转化/异常反射/相位梯度超表面/宽带Key words
polarization conversion/anomalous reflection/phase gradient metasurface/wideband引用本文复制引用
李勇峰,张介秋,屈绍波,王甲富,吴翔,徐卓,张安学..二维宽带相位梯度超表面设计及实验验证∗[J].物理学报,2015,(9):1-7,7.基金项目
国家自然科学基金(批准号:61331005,11204378,11274389,11304393,61302023)、中国博士后科学基金(批准号:2013M532131,2013M532221)和陕西省基础研究计划(批准号:2011JQ8031,2013JM6005)资助的课题.* Project supported by the National Natural Science Foundation of China (Grants Nos.61331005,11204378,11274389,11304393,61302023), the National Science Foundation for Post-doctoral Scientists of China (Grant Nos.2013M532131,2013M532221), and the Natural Science Foundation of Shaanxi Province, China (Grant Nos.2011JQ8031,2013JM6005) （批准号:61331005,11204378,11274389,11304393,61302023）
