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.
Lim, Wen Xiang
106df7f0-f4cc-4465-8861-c273be1d8e1b
Han, Song
d28e1e63-0942-479b-9217-55d24a4d1801
Gupta, Manoj
5cafd9ad-2bbe-4cac-a29f-cb526b63ab7c
MacDonald, Kevin F.
76c84116-aad1-4973-b917-7ca63935dba5
Singh, Ranjan
895cd3c3-d3d4-4c1f-81f9-f7cbbd13eae8
8 August 2017
Lim, Wen Xiang
106df7f0-f4cc-4465-8861-c273be1d8e1b
Han, Song
d28e1e63-0942-479b-9217-55d24a4d1801
Gupta, Manoj
5cafd9ad-2bbe-4cac-a29f-cb526b63ab7c
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).
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.
Text
linewidth narrowing via multipole tuning accepted version
- Accepted Manuscript
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
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Date deposited: 09 Aug 2017 16:31
Last modified: 16 Mar 2024 05:35
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Contributors
Author:
Wen Xiang Lim
Author:
Song Han
Author:
Manoj Gupta
Author:
Kevin F. MacDonald
Author:
Ranjan Singh
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