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. 2016 May 20;6:25639. doi: 10.1038/srep25639

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Solid lines represent the calculated values, and symbols represent the designed values by using different particles. (a) Metasurface grating with m = +1 and m = +2; (b) Metasurface grating with m = +1 and m = −2; (c) One period of the simulation model of the metasurface grating with m = +1 and m = +2; (d) One period of the simulation model of the metasurface grating with m = +1 and m = −2.