Toroidal lasing spaser
Toroidal lasing spaser
Toroidal shapes are often found in bio-molecules, viruses, proteins and fats, but only recently it was proved experimentally that toroidal structures can support exotic high-frequency electromagnetic excitations that are neither electric or magnetic multipoles. Such excitations, known as toroidal moments, could be playing an important role in enhancing inter-molecular interaction and energy transfer due to its higher electromagnetic energy confinement and weaker coupling to free space. Using a model toroidal metamaterial system, we show that coupling optical gain medium with high Q-factor toroidal resonance mode can enhance the single pass amplification to up to 65 dB. This offers an opportunity of creating the "toroidal" lasing spaser, a source of coherent optical radiation that is fueled by toroidal plasmonic oscillations in the nanostructure.
1-4
Huang, Yao-Wei
f4ed558b-509d-476a-b114-8eb1beec2f02
Chen, Wei Ting
bb86b3ab-cf10-4319-8b7f-ec4a8f1a3c98
Wu, Pin Chieh
1d63065a-5d41-4599-bca2-23bbf05ae42f
Fedotov, Vassili A.
3725f5cc-2d0b-4e61-95c5-26d187c84f25
Zheludev, Nikolay I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
Tsai, Din Ping
29dbf01e-c22a-45a5-95b3-839a185d1779
7 February 2013
Huang, Yao-Wei
f4ed558b-509d-476a-b114-8eb1beec2f02
Chen, Wei Ting
bb86b3ab-cf10-4319-8b7f-ec4a8f1a3c98
Wu, Pin Chieh
1d63065a-5d41-4599-bca2-23bbf05ae42f
Fedotov, Vassili A.
3725f5cc-2d0b-4e61-95c5-26d187c84f25
Zheludev, Nikolay I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
Tsai, Din Ping
29dbf01e-c22a-45a5-95b3-839a185d1779
Huang, Yao-Wei, Chen, Wei Ting, Wu, Pin Chieh, Fedotov, Vassili A., Zheludev, Nikolay I. and Tsai, Din Ping
(2013)
Toroidal lasing spaser.
Scientific Reports, 3, , [1237].
(doi:10.1038/srep01237).
(PMID:23393619)
Abstract
Toroidal shapes are often found in bio-molecules, viruses, proteins and fats, but only recently it was proved experimentally that toroidal structures can support exotic high-frequency electromagnetic excitations that are neither electric or magnetic multipoles. Such excitations, known as toroidal moments, could be playing an important role in enhancing inter-molecular interaction and energy transfer due to its higher electromagnetic energy confinement and weaker coupling to free space. Using a model toroidal metamaterial system, we show that coupling optical gain medium with high Q-factor toroidal resonance mode can enhance the single pass amplification to up to 65 dB. This offers an opportunity of creating the "toroidal" lasing spaser, a source of coherent optical radiation that is fueled by toroidal plasmonic oscillations in the nanostructure.
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srep01237
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Published date: 7 February 2013
Organisations:
Optoelectronics Research Centre
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Local EPrints ID: 350143
URI: http://eprints.soton.ac.uk/id/eprint/350143
PURE UUID: f9151963-7a9a-470b-b87b-16d10fbf2203
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Date deposited: 19 Mar 2013 14:12
Last modified: 15 Mar 2024 02:44
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Author:
Yao-Wei Huang
Author:
Wei Ting Chen
Author:
Pin Chieh Wu
Author:
Vassili A. Fedotov
Author:
Nikolay I. Zheludev
Author:
Din Ping Tsai
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