Active Control of Resonant Cloaking in a Terahertz MEMS Metamaterial

• DOI: 10.1002/adom.201800141
• Publication Date: 2018-06-01T06:11:04Z
• Authors: Manukumara Manjappa; Prakash Pitchappa; Nan Wang; Chengkuo Lee; Ranjan Singh
• Keywords: Cloaking; Split-ring resonator; Invisibility

Abstract Metamaterials exhibiting exotic optical properties have played a significant role over the years in guiding concept of invisibility cloaking from realm being fiction to reality. However, due difficulties fabricating 3D devices and lack plasmonic materials at terahertz (THz) frequencies, experimental realization phenomenon THz spectrum is challenging. In this work, new mechanism for based on resonant scattering cancellation technique 2D nonconcentric composite metamaterial device, consisting split ring resonator (SRR) microelectromechanical system (MEMS) reconfigurable closed (CRR) frequencies reported. A strong magnetic interaction between SRR CRR eliminates effects its fundamental eigen mode frequency, thereby making it invisible incident wave. Further, by voltage actuation MEMS‐reconfigurable CRR, an active switching visible cloaked states structure demonstrated. The proposed provides simple design realizing cloaks utilizing near‐field interactions subwavelength structures across microwave circumventing need with complex geometry properties.