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Title: Coupling Schemes in Terahertz Planar Metamaterials

Abstract

We present a review of the different coupling schemes in a planar array of terahertz metamaterials. The gap-to-gap near-field capacitive coupling between split-ring resonators in a unit cell leads to either blue shift or red shift of the fundamental inductive-capacitive ( LC ) resonance, depending on the position of the split gap. The inductive coupling is enhanced by decreasing the inter resonator distance resulting in strong blue shifts of the LC resonance. We observe the LC resonance tuning only when the split-ring resonators are in close proximity of each other; otherwise, they appear to be uncoupled. Conversely, the higher-order resonances are sensitive to the smallest change in the inter particle distance or split-ring resonator orientation and undergo tremendous resonance line reshaping giving rise to a sharp subradiant resonance mode which produces hot spots useful for sensing applications. Most of the coupling schemes in a metamaterial are based on a near-field effect, though there also exists a mechanism to couple the resonators through the excitation of lowest-order lattice mode which facilitates the long-range radiative or diffractive coupling in the split-ring resonator plane leading to resonance line narrowing of the fundamental as well as the higher order resonance modes.

Authors:
 [1];  [1];  [1];  [1];  [2];  [1]
  1. Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
  2. School of Electrical and Computer Engineering, Oklahoma State University, Stillwater, OK 74078, USA
Publication Date:
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP)
OSTI Identifier:
1198326
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Published Article
Journal Name:
International Journal of Optics
Additional Journal Information:
Journal Name: International Journal of Optics Journal Volume: 2012; Journal ID: ISSN 1687-9384
Publisher:
Hindawi Publishing Corporation
Country of Publication:
Country unknown/Code not available
Language:
English

Citation Formats

Roy Chowdhury, Dibakar, Singh, Ranjan, Taylor, Antoinette J., Chen, Hou-Tong, Zhang, Weili, and Azad, Abul K. Coupling Schemes in Terahertz Planar Metamaterials. Country unknown/Code not available: N. p., 2012. Web. doi:10.1155/2012/148985.
Roy Chowdhury, Dibakar, Singh, Ranjan, Taylor, Antoinette J., Chen, Hou-Tong, Zhang, Weili, & Azad, Abul K. Coupling Schemes in Terahertz Planar Metamaterials. Country unknown/Code not available. https://doi.org/10.1155/2012/148985
Roy Chowdhury, Dibakar, Singh, Ranjan, Taylor, Antoinette J., Chen, Hou-Tong, Zhang, Weili, and Azad, Abul K. Sun . "Coupling Schemes in Terahertz Planar Metamaterials". Country unknown/Code not available. https://doi.org/10.1155/2012/148985.
@article{osti_1198326,
title = {Coupling Schemes in Terahertz Planar Metamaterials},
author = {Roy Chowdhury, Dibakar and Singh, Ranjan and Taylor, Antoinette J. and Chen, Hou-Tong and Zhang, Weili and Azad, Abul K.},
abstractNote = {We present a review of the different coupling schemes in a planar array of terahertz metamaterials. The gap-to-gap near-field capacitive coupling between split-ring resonators in a unit cell leads to either blue shift or red shift of the fundamental inductive-capacitive ( LC ) resonance, depending on the position of the split gap. The inductive coupling is enhanced by decreasing the inter resonator distance resulting in strong blue shifts of the LC resonance. We observe the LC resonance tuning only when the split-ring resonators are in close proximity of each other; otherwise, they appear to be uncoupled. Conversely, the higher-order resonances are sensitive to the smallest change in the inter particle distance or split-ring resonator orientation and undergo tremendous resonance line reshaping giving rise to a sharp subradiant resonance mode which produces hot spots useful for sensing applications. Most of the coupling schemes in a metamaterial are based on a near-field effect, though there also exists a mechanism to couple the resonators through the excitation of lowest-order lattice mode which facilitates the long-range radiative or diffractive coupling in the split-ring resonator plane leading to resonance line narrowing of the fundamental as well as the higher order resonance modes.},
doi = {10.1155/2012/148985},
journal = {International Journal of Optics},
number = ,
volume = 2012,
place = {Country unknown/Code not available},
year = {Sun Jan 01 00:00:00 EST 2012},
month = {Sun Jan 01 00:00:00 EST 2012}
}

Journal Article:
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https://doi.org/10.1155/2012/148985

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