AUTHOR=Abdulkarim Yadgar I. , Mohanty Ayesha , Acharya Om Prakash , Appasani Bhargav , Khan Mohammad S. , Mohapatra S. K. , Muhammadsharif Fahmi F. , Dong Jian TITLE=A Review on Metamaterial Absorbers: Microwave to Optical JOURNAL=Frontiers in Physics VOLUME=10 YEAR=2022 URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2022.893791 DOI=10.3389/fphy.2022.893791 ISSN=2296-424X ABSTRACT=

Metamaterials (MM) are artificially designed materials that possess unique properties due to their geometrical design. They also display some peculiar properties, such as negative refractive index, Snell’s law reversal, Doppler effect reverse, and left-handed behavior. MMs are used in a myriad of applications, including invisibility cloaking, perfect lensing, perfect absorption, and sensing. In this review article, the property of electromagnetic absorption by structures known as metamaterial absorbers (MMAs) is discussed. An MMA is a composite made up of many layers of metallic patterns separated by dielectric. This novel device helps in achieving near-unity absorption by various mechanisms, which are investigated in this article. The MMAs are classified based on their absorption characteristics, such as polarization tunability, broadband operation, and multiband absorption, in different frequency regimes.