Ultra-thin and light-weight spoof surface plasmon polariton coupler achieved by broadside coupled split ring resonators<xref rid="cpb_27_10_100304fn1" ref-type="fn">*</xref><fn id="cpb_27_10_100304fn1"><label>*</label><p>Project supported by the National Natural Science Foundation of China (Grant Nos. 61331005, 61471388, and 61501503).</p></fn>

Ultra-thin and light-weight spoof surface plasmon polariton coupler achieved by broadside coupled split ring resonators**

Project supported by the National Natural Science Foundation of China (Grant Nos. 61331005, 61471388, and 61501503).

Fan Ya, Wang Jia-Fu^†, Ma Hua, Li Yong-Feng, Feng Ming-De, Qu Shao-Bo^‡

(color online) (a) Perspective view of sub-unit-cell; ((b) and (c)) specular reflections S₁₁, reflective phase distributions of six sub-unit-cells and the ratio of the phase gradient ξ to the wave vector k of free space; (d) super-cell composed of six sub-unit-cells with l = 0.24 mm, 1.17 mm, 1.45 mm, 1.55 mm, 1.66 mm, and 2.15 mm, where the first and second layer present the front and back views, respectively.