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Fabrication of Nanopillar-Based Split Ring Resonators for Displacement Current Mediated Resonances in Terahertz Metamaterials
Published on: March 23, 2017
Anapole state revealed by cloaking metallic cylinders with split ring resonators
Valiyaveettil Pushpakaran Sarin1, Giuseppe Labate2, Puthiyapurayil Viswanathan Vinesh3
1Department of Electronics, Government Arts and Science College Tanur, Malappuram, Kerala, India. sarincrema@gmail.com.
Abstract:
This paper proposes the experimental demonstration of an anapole-based cylindrical electromagnetic cloaking scheme. An anapole state is excited by arranging around a cylindrical metallic target vertical split-ring resonators, forming an equivalent surface admittance boundary condition able to suppress the scattering. Using Mie formalism and multipole scattering theory, we identify the actual reason behind the cloaking operation, characterizing the anapole condition by the scattering contributions from toroidal and electric dipole moments. Numerical results are verified using full-wave simulation softwares and subsequently validated with back-scattering measurements inside an anechoic chamber.
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