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Title: Accessing the High-Q Dark Plasmonic Fano Resonances in Superconductor Metasurfaces
Authors: Srivastava, Yogesh Kumar
Manjappa, Manukumara
Krishnamoorthy, Harish N. S.
Singh, Ranjan
Krishnamoorthy, Harish Natarajan Swaha
Keywords: Fano Resonance Phenomena
High-Q Resonances
Issue Date: 2016
Source: Srivastava, Y. K., Manjappa, M., Krishnamoorthy, H. N. S., & Singh, R. (2016). Accessing the High-Q Dark Plasmonic Fano Resonances in Superconductor Metasurfaces. Advanced Optical Materials, 4(11), 1875-1881.
Series/Report no.: Advanced Optical Materials
Abstract: Superconducting metamaterials at terahertz frequencies has provided a platform for designing switchable plasmonic metamaterial devices. However, since metals at terahertz frequencies are excellent conductors, the superior role of superconductors in designing low-loss, high quality factor metamaterials remains unclear. In this work, a low asymmetry Fano resonant split-ring-resonator is considered in which a regime of extremely low radiative loss is identified where the high temperature yttrium barium copper oxide superconductor meta-atom supports a sharp high quality factor Fano resonance while an identical metallic resonator does not show the resonance behavior. The radiative and the nonradiative losses are comparable in low asymmetry Fano resonant meta-atoms. The observation of high quality factor Fano resonance behavior clearly establishes the utility of superconductors over metals in designing lower loss plasmonic metamaterials at terahertz frequencies that may have multifunctional applications in areas that require strong light–matter interactions.
ISSN: 2195-1071
DOI: 10.1002/adom.201600354
Rights: © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:SPMS Journal Articles

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