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Optical plasmonic response of niobium around the superconducting transition temperature

Optical plasmonic response of niobium around the superconducting transition temperature
Optical plasmonic response of niobium around the superconducting transition temperature
We present the first experimental evidence of a direct link between the optical properties of a material and onset of superconductivity .
By measuring the dielectric constants of an unpatterned niobium film as well as the reflectivity of a nanostructured niobium metamaterial, we demonstrate a critical dependence of niobium optical response on temperature near its superconducting transition at 9K. Our studies point to a hitherto unknown connection between superconductivity and optical range plasmonics. We explain the experimentally observed critical dependence of the metamaterial resonance position on the transition temperature of niobium by means of a thermodynamics - based model that takes into account the change in the free energy of the metamaterial resonator between the normal and superconducting states. We argue that this is a signature of the transition to the superconducting state, which is detected by infrared photons.
Liao, C.Y.
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Krishnamoorthy, H.N.S.
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Savinov, V.
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Ou, J.-Y.
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Delfanazari, K.
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Huang, C.
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Adamo, G.
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Plum, E.
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MacDonald, K.F.
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Chong, Y.D.
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Soci, C.
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Kusmartsev, F.V.
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Tsai, D.P.
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Zheludev, Nikolai
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Liao, C.Y.
dac84f98-82c5-41d8-94d7-9da03c2ed047
Krishnamoorthy, H.N.S.
2073dc90-c3d3-43f0-a5dc-9a6bf1ac824a
Savinov, V.
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Ou, J.-Y.
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Delfanazari, K.
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Huang, C.
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Adamo, G.
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Plum, E.
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MacDonald, K.F.
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Chong, Y.D.
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Soci, C.
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Kusmartsev, F.V.
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Tsai, D.P.
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Zheludev, Nikolai
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Liao, C.Y., Krishnamoorthy, H.N.S., Savinov, V., Ou, J.-Y., Delfanazari, K., Huang, C., Adamo, G., Plum, E., MacDonald, K.F., Chong, Y.D., Soci, C., Kusmartsev, F.V., Tsai, D.P. and Zheludev, Nikolai (2017) Optical plasmonic response of niobium around the superconducting transition temperature. Institute of Physics Singapore (IPS) Meeting 2017, Singapore. 22 - 24 Feb 2017.

Record type: Conference or Workshop Item (Other)

Abstract

We present the first experimental evidence of a direct link between the optical properties of a material and onset of superconductivity .
By measuring the dielectric constants of an unpatterned niobium film as well as the reflectivity of a nanostructured niobium metamaterial, we demonstrate a critical dependence of niobium optical response on temperature near its superconducting transition at 9K. Our studies point to a hitherto unknown connection between superconductivity and optical range plasmonics. We explain the experimentally observed critical dependence of the metamaterial resonance position on the transition temperature of niobium by means of a thermodynamics - based model that takes into account the change in the free energy of the metamaterial resonator between the normal and superconducting states. We argue that this is a signature of the transition to the superconducting state, which is detected by infrared photons.

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optical superconductor plasmonics
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Published date: 22 February 2017
Venue - Dates: Institute of Physics Singapore (IPS) Meeting 2017, Singapore, 2017-02-22 - 2017-02-24

Identifiers

Local EPrints ID: 413757
URI: http://eprints.soton.ac.uk/id/eprint/413757
PURE UUID: b9e20768-381b-480d-8396-670b48087f97
ORCID for V. Savinov: ORCID iD orcid.org/0000-0001-7203-7222
ORCID for J.-Y. Ou: ORCID iD orcid.org/0000-0001-8028-6130
ORCID for E. Plum: ORCID iD orcid.org/0000-0002-1552-1840
ORCID for K.F. MacDonald: ORCID iD orcid.org/0000-0002-3877-2976
ORCID for Nikolai Zheludev: ORCID iD orcid.org/0000-0002-1013-6636

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Date deposited: 05 Sep 2017 16:30
Last modified: 14 Mar 2019 01:53

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