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|Title:||Active control of resonant cloaking in a terahertz MEMS metamaterial||Authors:||Manjappa, Manukumara
|Issue Date:||2018||Source:||Manjappa, M., Pitchappa, P., Wang, N., Lee, C., & Singh, R. (2018). Active Control of Resonant Cloaking in a Terahertz MEMS Metamaterial. Advanced Optical Materials, 6(16), 1800141-. doi:10.1002/adom.201800141||Series/Report no.:||Advanced Optical Materials||Abstract:||Metamaterials exhibiting exotic optical properties have played a significant role over the years in guiding the concept of invisibility cloaking from the realm of being fiction to reality. However, due to the difficulties in fabricating the 3D cloaking devices and lack of exotic plasmonic materials at terahertz (THz) frequencies, the experimental realization of cloaking phenomenon in the THz spectrum is challenging. In this work, a new mechanism for invisibility cloaking based on the resonant scattering cancellation technique in a 2D nonconcentric composite metamaterial device, consisting of a split ring resonator (SRR) and a microelectromechanical system (MEMS) reconfigurable closed ring resonator (CRR) at THz frequencies is reported. A strong magnetic interaction between the SRR and CRR eliminates the scattering effects from the SRR at its fundamental eigen mode frequency, thereby making it invisible to the incident THz wave. Further, by voltage actuation of MEMS‐reconfigurable CRR, an active switching between the visible and cloaked states of SRR structure is demonstrated. The proposed technique provides a simple design and technique for realizing invisibility cloaks by utilizing the resonant near‐field interactions in the subwavelength structures across microwave to optical frequencies, thereby circumventing the need for materials with complex geometry and exotic properties.||URI:||https://hdl.handle.net/10356/88957
|DOI:||10.1002/adom.201800141||Rights:||© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. This is the peer reviewed version of the following article: Manjappa, M., Pitchappa, P., Wang, N., Lee, C., & Singh, R. (2018). Active Control of Resonant Cloaking in a Terahertz MEMS Metamaterial. Advanced Optical Materials, 6(16), 1800141-., which has been published in final form at http://dx.doi.org/10.1002/adom.201800141. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.||Fulltext Permission:||open||Fulltext Availability:||With Fulltext|
|Appears in Collections:||SPMS Journal Articles|
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