Thursday, March 31, 2016
Abstract-A micromachined freestanding terahertz absorber with an array of metallic patches
An array of square metallic patches on a thin suspended layer is introduced as an effective terahertz absorber. The suspended structure is placed on a metalized substrate and the device exhibits behavior at specific frequencies determined by the size of the patches. It is feasible to place patches with different sizes in an array formation for a broadband absorber. In array configuration, individual elements induce distinct resonances yielding narrow band regions. Design of the absorber is described using electromagnetic simulations. The absorber structure was fabricated on a wafer using standard microfabrication techniques. The of the absorber were using a terahertz time domain The data match well the simulations indicating strong peaks in a band of 0.5-2 THz.