Buckling‐Induced Assembly of Three‐Dimensional Tunable Metamaterials (Phys. Status Solidi RRL 4/2018). Issue 4 (3rd April 2018) - Zhou, Shiwei
Abstract : Unlike planar metamaterials, often named as metasurfaces for their extraordinary surface properties, which can be conveniently printed by various lithographic techniques, e.g. focused‐ion beam milling and direct laser writing, it is a great challenge to produce three‐dimensional (3D) metamaterials efficiently and precisely, especially for those components working in the optical regime whose feature sizes should be scaled down to an operational sub‐wavelength. Shiwei Zhou et al. (article no.1700420 ) propose and demonstrate two reconfigurable 3D metamaterials produced via buckling response. Similar to conventional metamaterials, the metal in specified shapes like the split‐ring are directly printed on the substrate. But these patterns are locally bonded to a stretched compliant substrate in some specified regions and consequently deformed out of the plane with the retraction of substrate. The numerical simulation in Abaqus shows that two patterns of gold film can be bent into ω‐like resonators with a downward opening and an upward opening, respectively. The transmission spectra and resonance mechanism of these 3D resonators are further studied via numerical simulation.