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Title: Sensing with toroidal metamaterial
Authors: Gupta, Manoj
Srivastava, Yogesh Kumar
Manjappa, Manukumara
Singh, Ranjan
Keywords: Toroidal plasma confinement
Issue Date: 2017
Source: Gupta, M., Srivastava, Y. K., Manjappa, M., & Singh, R. (2017). Sensing with toroidal metamaterial. Applied Physics Letters, 110(12), 121108-.
Series/Report no.: Applied Physics Letters
Abstract: Localized electromagnetic excitation in the form of toroidal dipoles has recently been observed in metamaterial systems. The origin of the toroidal dipole lies in the currents flowing on the surface of a torus. Thus, the exotic toroidal excitations play an important role in determining the optical properties of a system. Toroidal dipoles also contribute towards enabling high quality factor subwavelength resonances in metamaterial systems which could be an excellent platform for probing the light matter interaction. Here, we demonstrate sensing with toroidal resonance in a two-dimensional terahertz metamaterial in which a pair of mirrored asymmetric Fano resonators possesses anti-aligned magnetic moments at an electromagnetic resonance that gives rise to a toroidal dipole. Our proof of concept demonstration opens up an avenue to explore the interaction of matter with toroidal multipoles that could have strong applications in the sensing of dielectrics and biomolecules.
ISSN: 0003-6951
DOI: 10.1063/1.4978672
Rights: © 2017 American Institute of Physics (AIP). This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of American Institute of Physics (AIP). The published version is available at: []. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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