A wideband deflected reflection based on multiple resonances
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We propose to realize wideband deflected reflection in microwave regime through multiple resonances. A wideband deflected reflection of a phase gradient metasurface is designed using a double-head arrow structure, which has demonstrated an ultra-wideband cross-polarized reflection caused by multiple electric and magnetic resonances. The wideband effect benefits from the wideband cross-polarized reflection and flexible phase modulation of the double-head arrow structure. Simulated and experimental results agree well with theoretical predictions. Furthermore, relative bandwidths of deflected reflection reach to 71 % for both x- and y-polarized waves under normal incidence. Our method of expansion bandwidth may pave the way in many practical applications, such as RCS reduction, stealth surfaces.
KeywordsPhase Gradient Multiple Resonance Super Cell Relative Bandwidth Anomalous Reflection
The authors are grateful to the supports from the National Natural Science Foundation of China under Grants Nos. 61331005, 11204378, 11274389, 11304393, 61302023, the National Science Foundation for Post-doctoral Scientists of China under Grant Nos. 2013M532131, 2013M532221, and the Natural Science Foundation of Shaanxi Province under Grant Nos. 2011JQ8031, 2013JM6005.
- 13.Z.Y. Wei, Y. Cao, X.P. Su, Z.J. Gong, Y. Long, H.Q. Li, Opt. Express 21, 10741 (2013)Google Scholar