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Coherent emission from plasmonic metamaterials

Coherent emission from plasmonic metamaterials
Coherent 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.
3fb703e3-b222-46d2-b4ee-75f296d9d64d
So, J.-K.
06a7afea-61c2-439d-9ac4-047ea21a909b
Jenkins, S.D.
65d861fb-b85a-4927-805a-7c906fca26c6
MacDonald, K.F.
76c84116-aad1-4973-b917-7ca63935dba5
De Angelis, F.
756de3f3-3aa1-456b-9931-8b48f0e71a47
Di Fabrizio, E.
548c09c1-ce38-4037-bb49-d18ed1c834b7
Ruostekoski, J.
2beb155e-64b0-4ee9-9cfe-079947a9c9f4
Zheludev, N.I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
Adamo, G.
73480dbd-5d3e-415a-b569-9606b3dbeecc
Ou, J-Y.
3fb703e3-b222-46d2-b4ee-75f296d9d64d
So, J.-K.
06a7afea-61c2-439d-9ac4-047ea21a909b
Jenkins, S.D.
65d861fb-b85a-4927-805a-7c906fca26c6
MacDonald, K.F.
76c84116-aad1-4973-b917-7ca63935dba5
De Angelis, F.
756de3f3-3aa1-456b-9931-8b48f0e71a47
Di Fabrizio, E.
548c09c1-ce38-4037-bb49-d18ed1c834b7
Ruostekoski, J.
2beb155e-64b0-4ee9-9cfe-079947a9c9f4
Zheludev, N.I.
32fb6af7-97e4-4d11-bca6-805745e40cc6

Adamo, G., Ou, J-Y., So, J.-K., Jenkins, S.D., MacDonald, K.F., De Angelis, F., Di Fabrizio, E., Ruostekoski, J. and Zheludev, N.I. (2012) Coherent emission from plasmonic metamaterials. SPIE Photonics Europe 2012, Belgium. 16 - 19 Apr 2012.

Record type: Conference or Workshop Item (Poster)

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: April 2012
Venue - Dates: SPIE Photonics Europe 2012, Belgium, 2012-04-16 - 2012-04-19
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 379291
URI: https://eprints.soton.ac.uk/id/eprint/379291
PURE UUID: e337f4ee-ded9-4ef7-9abb-979cc19d599b
ORCID for J-Y. Ou: ORCID iD orcid.org/0000-0001-8028-6130
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 15:24
Last modified: 14 Dec 2018 01:38

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Contributors

Author: G. Adamo
Author: J-Y. Ou ORCID iD
Author: J.-K. So
Author: S.D. Jenkins
Author: K.F. MacDonald ORCID iD
Author: F. De Angelis
Author: E. Di Fabrizio
Author: J. Ruostekoski
Author: N.I. Zheludev ORCID iD

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