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Metamaterials and plasmonics build up a new pioneering field in photonics which joins the features of photonics and electronics by coupling photons to conduction electrons of a metal as surface plasmons (SP). In the present work, we apply this concept for realization of perfect absorber based plasmonic metamaterials at THz frequencies. we demonstrate design, fabrication and characterization of a perfect plasmonic absorber in a stack of metal and nanocomposite showing nearly 100 % absorbance across a broad range of frequencies from ultraviolet to the near infrared. Our experimental results showed that the absorption peak of the stacks can be tuned upon varying the thickness and type of the spacer layer. The fabrication technique of our metamaterials is relatively simple, cost effective, and compatible with current industrial methods of MEMS which make our proposed systems outstanding candidates for opto-electronic applications.

Plasmonics; Metamaterials; Perfect absorber; visible frequency;