Fishnet metamaterials with incorporated titanium absorption layer

Some metamaterial applications require the use of high-power lasers, but the incoming radiation may damage the metamaterials. In addition to that, the presence of an absorptive material placed close to metamaterial surface can lead to quick heating of the surrounding area, resulting in serious thermal damage or melting of the fabricated pattern. We study the impact of a titanium absorptive layer on top of a conventional fishnet structure and we show that due to increased absorption the melting power is reduced by nearly 50% and thermal damage leads to the formation of microbumps on the exposed surface.