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Active plasmonics: Controlling signals in Au/Ga waveguide using nanoscale structural transformations

Active plasmonics: Controlling signals in Au/Ga waveguide using nanoscale structural transformations
Active plasmonics: Controlling signals in Au/Ga waveguide using nanoscale structural transformations
We have developed a concept for active plasmonics that exploits nanoscale structural transformations which is supported by rigorous numerical analysis. We show that surface plasmon-polariton signals in a metal-on-dielectric waveguide, containing a gallium section a few microns long, can be effectively controlled by switching the structural phase of gallium. The switching may be achieved by either changing the waveguide temperature or by external optical excitation. The signal modulation depth could exceed 80% and switching times are expected to be in the picosecond–microsecond time scale.
0003-6951
1416-1418
Krasavin, A.V.
2026f437-6d31-4ca1-a07f-52adc7aa24a4
Zheludev, N.I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
Krasavin, A.V.
2026f437-6d31-4ca1-a07f-52adc7aa24a4
Zheludev, N.I.
32fb6af7-97e4-4d11-bca6-805745e40cc6

Krasavin, A.V. and Zheludev, N.I. (2004) Active plasmonics: Controlling signals in Au/Ga waveguide using nanoscale structural transformations. Applied Physics Letters, 84 (8), 1416-1418. (doi:10.1063/1.1650904).

Record type: Article

Abstract

We have developed a concept for active plasmonics that exploits nanoscale structural transformations which is supported by rigorous numerical analysis. We show that surface plasmon-polariton signals in a metal-on-dielectric waveguide, containing a gallium section a few microns long, can be effectively controlled by switching the structural phase of gallium. The switching may be achieved by either changing the waveguide temperature or by external optical excitation. The signal modulation depth could exceed 80% and switching times are expected to be in the picosecond–microsecond time scale.

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Published date: 2004

Identifiers

Local EPrints ID: 28611
URI: https://eprints.soton.ac.uk/id/eprint/28611
ISSN: 0003-6951
PURE UUID: 846f1f30-c2bf-46d6-8b45-66979df6753b
ORCID for N.I. Zheludev: ORCID iD orcid.org/0000-0002-1013-6636

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Date deposited: 02 May 2006
Last modified: 10 Dec 2019 01:56

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