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Near-infrared linewidth narrowing in plasmonic Fano-resonant metamaterials via tuning of multipole contributions

Near-infrared linewidth narrowing in plasmonic Fano-resonant metamaterials via tuning of multipole contributions
Near-infrared linewidth narrowing in plasmonic Fano-resonant metamaterials via tuning of multipole contributions
We report on an experimental and computational (multipole decomposition) study of Fano resonance modes in complementary near-IR plasmonic metamaterials. Resonance wavelengths and linewidths can be controlled by changing the symmetry of the unit cell so as to manipulate the balance among multipole contributions. In the present case, geometrically inverting one half of a four-slot (paired asymmetric double bar) unit cell design changes the relative magnitude of magnetic quadrupole and toroidal dipole contributions leading to enhanced quality factor, figure of merit and spectral tuning of the plasmonic Fano resonance.
0003-6951
Lim, Wen Xiang
106df7f0-f4cc-4465-8861-c273be1d8e1b
Han, Song
d28e1e63-0942-479b-9217-55d24a4d1801
Gupta, Manoj
4152554b-5c20-41e6-8fea-f70d9448298e
MacDonald, Kevin F.
76c84116-aad1-4973-b917-7ca63935dba5
Singh, Ranjan
895cd3c3-d3d4-4c1f-81f9-f7cbbd13eae8
Lim, Wen Xiang
106df7f0-f4cc-4465-8861-c273be1d8e1b
Han, Song
d28e1e63-0942-479b-9217-55d24a4d1801
Gupta, Manoj
4152554b-5c20-41e6-8fea-f70d9448298e
MacDonald, Kevin F.
76c84116-aad1-4973-b917-7ca63935dba5
Singh, Ranjan
895cd3c3-d3d4-4c1f-81f9-f7cbbd13eae8

Lim, Wen Xiang, Han, Song, Gupta, Manoj, MacDonald, Kevin F. and Singh, Ranjan (2017) Near-infrared linewidth narrowing in plasmonic Fano-resonant metamaterials via tuning of multipole contributions. Applied Physics Letters, 111 (6), [061104]. (doi:10.1063/1.4997423).

Record type: Article

Abstract

We report on an experimental and computational (multipole decomposition) study of Fano resonance modes in complementary near-IR plasmonic metamaterials. Resonance wavelengths and linewidths can be controlled by changing the symmetry of the unit cell so as to manipulate the balance among multipole contributions. In the present case, geometrically inverting one half of a four-slot (paired asymmetric double bar) unit cell design changes the relative magnitude of magnetic quadrupole and toroidal dipole contributions leading to enhanced quality factor, figure of merit and spectral tuning of the plasmonic Fano resonance.

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linewidth narrowing via multipole tuning accepted version - Accepted Manuscript
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More information

Accepted/In Press date: 24 July 2017
e-pub ahead of print date: 8 August 2017
Published date: 8 August 2017

Identifiers

Local EPrints ID: 412939
URI: http://eprints.soton.ac.uk/id/eprint/412939
ISSN: 0003-6951
PURE UUID: 97a2ce6f-41ec-4130-9f90-052e06681e9a
ORCID for Kevin F. MacDonald: ORCID iD orcid.org/0000-0002-3877-2976

Catalogue record

Date deposited: 09 Aug 2017 16:31
Last modified: 22 Nov 2021 05:38

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Contributors

Author: Wen Xiang Lim
Author: Song Han
Author: Manoj Gupta
Author: Ranjan Singh

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