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. 2015 Jul 23;5:12476. doi: 10.1038/srep12476

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(a) The yellow parts are metal (modeled as copper) and the grey part is the 3mm-thick substrate. (b) Specific illustration of the anchor-shaped unit cell, in which O₁and O₂bear a distance of 0.6 mm along the v-axis. The angle of the transformed V-shaped resonator is θ, which is not labeled in the figure. (This figure was drawn by Jia Yuan Yin)