Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/99678
Title: Probing the transition from an uncoupled to a strong near-field coupled regime between bright and dark mode resonators in metasurfaces
Authors: Singh, Ranjan
Al-Naib, Ibraheem
Chowdhury, Dibakar Roy
Cong, Longqing
Rockstuhl, Carsten
Zhang, Weili
Keywords: DRNTU::Science::Physics
Issue Date: 2014
Source: Singh, R., Al-Naib, I., Chowdhury, D. R., Cong, L., Rockstuhl, C., & Zhang, W. (2014). Probing the transition from an uncoupled to a strong near-field coupled regime between bright and dark mode resonators in metasurfaces. Applied physics letters, 105(8), 081108-.
Series/Report no.: Applied physics letters
Abstract: The coupling of multiple plasmonic resonators that sustain bright or dark modes provide intriguing spectral signatures. However, probing the onset of coupling effects while engaging the resonators with an increasing proximity has not yet been studied experimentally in detail. Nevertheless, this is of utmost importance to bridge the phenomenological understanding with the peculiarities of real-world-samples. Here, we take advantage of the ability to control spatial dimensions of THz metasurfaces deep in the sub-wavelength domain to study different regimes that occur while coupling split-ring-resonators that sustain a bright and a dark mode with increasing strength. We identify the length scales at which the resonators are uncoupled and then enter the regimes of weak, moderate, and strong coupling. It is shown that a strong coupling takes place only at distances smaller than one hundredth of the resonance wavelength. Understanding the features that emerge from such hybridization is important to take advantage of fundamental effects in metamaterials such as classical analogs of electromagnetically induced transparency, lasing spaser, near-field manipulation, and sensing with dark mode resonances.
URI: https://hdl.handle.net/10356/99678
http://hdl.handle.net/10220/24063
DOI: 10.1063/1.4893726
Rights: © 2014 AIP Publishing LLC. This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of AIP Publishing LLC. The paper can be found at the following official DOI: [http://dx.doi.org/10.1063/1.4893726].  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
Appears in Collections:SPMS Journal Articles

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