Resonant response in mechanically tunable metasurface based on crossed metallic gratings with controllable crossing angle

We report on a modern class of mechanically tunable planarmetamaterials comprisingresonating units formed by crossed metallic stripgratings. We observe aresonant response in transmissionspectra of a linearly polarized wave passing through a system of crossedgratings in themicrowave regime. Eachgrating consists of an array of parallel metallic strips located on the top of adielectric substrate. It is revealed that theresonant position appears to be dependent on the angle of crossedgratings. It is found theoretically and experimentally that theresonant shift on the frequency scale appears as a result of increasing in the length of theresonating portion of the parallelogram periodic cell formed by the crossed metallic strips with decreasing crossing angle. The proposed design can be used in innovative types of planarmetamaterials and filters.

Source: Applied Physics Letters - December 1, 2016 Category: Physics Authors: V. Yachin, L. Ivzhenko, S. Polevoy and S. Tarapov Source Type: research