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Coherent light emission from plasmonic metamaterials

Coherent light emission from plasmonic metamaterials
Coherent light emission from plasmonic metamaterials
We report on a fundamentally new radiation phenomenon in nanostructures: emission of spatially coherent and spectrally narrow-band light driven by localized injection of free electrons into a planar plasmonic metamaterial. In ‘coherent’ metamaterials, where interactions among the meta-molecules are strong, an electron beam can generate a synchronized, in-phase response across a large number of meta-molecules leading to threshold-free emission of spatially coherent light propagating perpendicular to the metamaterial.

In a laser, coherence is derived from the bosonic statistics of photons, the resonant properties of the laser cavity and the collective nature of stimulated emission in the gain medium, and a threshold level of input energy is required to maintain the gain and overcome losses. Here we show experimentally that a scalable low-divergence, threshold-free optical source can be constructed on the basis of a collectively oscillating optical nano-antenna array formed by the metamaterial wherein coherence is provided not by the feed (as in conventional microwave antenna arrays) but via the strong mutual interactions among the nano-antennas.
Adamo, G.
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Ou, J-Y.
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So, J.K.
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Ren, M.
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Plum, E.
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Rogers, E.T.F.
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MacDonald, K.F.
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Xu, J.
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Zheludev, N.I.
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Adamo, G.
a614528b-81c3-4f38-a709-5e582b03e7d2
Ou, J-Y.
3fb703e3-b222-46d2-b4ee-75f296d9d64d
So, J.K.
06a7afea-61c2-439d-9ac4-047ea21a909b
Ren, M.
926d7f62-0185-4ad1-9650-60ac7cb9a83a
Plum, E.
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Rogers, E.T.F.
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MacDonald, K.F.
76c84116-aad1-4973-b917-7ca63935dba5
Xu, J.
e3837799-f55a-4049-a5d5-75b4ed981dd5
Zheludev, N.I.
32fb6af7-97e4-4d11-bca6-805745e40cc6

Adamo, G., Ou, J-Y., So, J.K., Ren, M., Plum, E., Rogers, E.T.F., MacDonald, K.F., Xu, J. and Zheludev, N.I. (2012) Coherent light emission from plasmonic metamaterials. CLEO/QELS, San Jose, United States. 06 - 11 May 2012. 2 pp . (doi:10.1364/QELS.2012.QM1H.1).

Record type: Conference or Workshop Item (Other)

Abstract

We report on a fundamentally new radiation phenomenon in nanostructures: emission of spatially coherent and spectrally narrow-band light driven by localized injection of free electrons into a planar plasmonic metamaterial. In ‘coherent’ metamaterials, where interactions among the meta-molecules are strong, an electron beam can generate a synchronized, in-phase response across a large number of meta-molecules leading to threshold-free emission of spatially coherent light propagating perpendicular to the metamaterial.

In a laser, coherence is derived from the bosonic statistics of photons, the resonant properties of the laser cavity and the collective nature of stimulated emission in the gain medium, and a threshold level of input energy is required to maintain the gain and overcome losses. Here we show experimentally that a scalable low-divergence, threshold-free optical source can be constructed on the basis of a collectively oscillating optical nano-antenna array formed by the metamaterial wherein coherence is provided not by the feed (as in conventional microwave antenna arrays) but via the strong mutual interactions among the nano-antennas.

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More information

Published date: May 2012
Additional Information: QM1H.1
Venue - Dates: CLEO/QELS, San Jose, United States, 2012-05-06 - 2012-05-11
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 379287
URI: https://eprints.soton.ac.uk/id/eprint/379287
PURE UUID: b2884d53-befd-42e8-a528-9ff8bc1bdfa1
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 N.I. Zheludev: ORCID iD orcid.org/0000-0002-1013-6636

Catalogue record

Date deposited: 16 Jul 2015 15:26
Last modified: 22 Dec 2018 01:37

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