Abstract
We propose a random multi-rings metallic mesh (RMR-MM) with the two-step randomized design process. By randomly shrinking the radii and changing the center positions of the basic rings, adding and interrupting the external common tangent rings, filling random sub-rings and supplementary rings, the superposition probability of diffraction spots generated by the multi-rings is reduced to a ultra-low level and thus ultra-uniform diffraction pattern is achieved. Experiment shows that the maximum high-order diffraction energy of RMR-MM experience an 85.96% drop from that of traditional triangle-distributed basic ring mesh, while the average normalized visible transmittance as high as 95.76% in 400–700 nm is achieved. In addition, the 200-nm-thick aluminum RMR-MM exhibits an electromagnetic shielding effectiveness of over 17.5 dB in the Ku-band. These excellent properties indicate RMR-MM is favorable in transparent electrodes as well as electromagnetic interference shielding application for optically transparent devices.
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