Design and Analysis of Metamaterial Absorbers for Terahertz Applications

Abstract

newline The inclusion of wireless technology in various electronic devices leads to significant electromagnetic (EM) interference in the environment. These EM waves when comes in contact with human body results in thermal and non-thermal effects on tissues leading to adverse health issues. Hence, there is a growing need for absorbing materials to reduce the impact of EM waves. Absorbers play a crucial role in communication system due to their ability for signal attenuation, reflection suppression, signal isolation, electromagnetic compatibility and so on. Overall absorbers contribute to the efficient and reliable operation by managing signal quality, minimizing interference and ensuring proper electromagnetic performance. The complexity of conventional absorbers with their high cost prevents them from being used in variety of applications. According to the need of the present-day communication systems, the research focus moved towards the compact and simple absorbers based on metamaterials. The fundamental requirements for modern communication systems are high performance and compact size. The field of metamaterial (MM) is very fresh compared to other mature technologies. The development of metamaterials has made it possible to control and manipulate light as desired, through powerful light matter interactions at the subwavelength scale. newlineIn recent years, metamaterials-based absorbers ranked among the new technologies towards the increasing system efficiency and to obtain absorption properties defined at the user end. Metamaterials are a new class of well-ordered composites that exhibit exceptional electromagnetic characteristics not usually observed in nature. Electric permittivity and magnetic permeability of metamaterials, in particular, may be fine-tuned to create extraordinarily strong absorbers. The metamaterial absorbers (MMA) prohibit the reflections and transmission by absorbing the energy of incident waves. MMAs have excellent characteristics such as high absolute absorption and adaptable design. T