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Title: Tailoring the multipoles in THz toroidal metamaterials
Authors: Cong, Longqing
Srivastava, Yogesh Kumar
Singh, Ranjan
Keywords: Metamaterials
Electronic devices
Issue Date: 2017
Source: Cong, L., Srivastava, Y. K., & Singh, R. (2017). Tailoring the multipoles in THz toroidal metamaterials. Applied Physics Letters, 111(8), 081108-.
Series/Report no.: Applied Physics Letters
Abstract: The multipoles play a significant role in determining the resonant behavior of subwavelength resonators that form the basis of metamaterial and plasmonic systems. Here, we study the impact of multipoles including toroidal dipole on the resonance intensity and linewidth of the fundamental inductive-capacitance (LC) resonance of a metamaterial array. The dominant multipoles that strongly contribute to the resonances are tailored by spatial rearrangement of the neighboring resonators such that the mutual interactions between the magnetic, electric, and toroidal configurations lead to enormous change in the linewidth as well as the resonance intensity of the LC mode. Manipulation of the multipoles in a metamaterial array provides a general strategy for the optimization of the quality factor of metamaterial resonances, which is fundamental to its applications in broad areas of sensing, lasing and nonlinear optics where stronger field confinement plays a significant role.
ISSN: 0003-6951
DOI: 10.1063/1.4993670
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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