GRAPHITE BASED METAL FREE ABSORBER FOR MULTIBAND AND ENHANCED ABSORPTION

Electronics and Communication Engineering

Terahertz absorbers are important for improving the performance of terahertz based technologies in a wide range of applications. Terahertz absorbers are the materials or devices that absorb electromagnetic radiation in the range of terahertz frequency (typically between 0.1 and 10 terahertz). There are many applications of terahertz absorbers which include security screening, energy harvesting, communication, sensing etc. In this paper we have implemented a technique for the generation of multiple bands and enhancement of the absorption in a graphite based absorber. The generation of multiple absorption bands is supported by the aspect ratio of the graphite sheet. For the enhancement of absorption the notches and slots are introduced later in the graphite sheet. By varying the different physical parameters of the absorber we can control the generated multiple absorption bands separately. Moreover the proposed structure is metal-free, polarization insensitive and can operate with a wide value of incident angle. The work represents a way to implement the metal-free absorber structure.

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