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. 2019 Apr 24;9:6510. doi: 10.1038/s41598-019-42444-y

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© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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(a) Schematic of the smaller supercell which consists of eight nanodisks, where each responsible for phase shift from 0 to 2π with π/4 increments. (b) Simulated phase profile obtained by the metasurface resulting in a diffraction angle of 15.66° at 680 nm wavelength. (c) Simulated Far-field profiles of the incident light intensity (top) and transmitted intensity (bottom). (d) SEM image of the fabricated metasurface, which consists of eight nanodisks and corresponds to the phase shift 0 to 2π with π/4 increments. (e) Experimental measurement of transmission spectra for zero and other orders. (f) Experimental far-field profile of the incident (top) and transmitted intensity (bottom) captured by a CCD camera.