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Controlling light with light via structural transformations in metallic nanoparticles

Controlling light with light via structural transformations in metallic nanoparticles
Controlling light with light via structural transformations in metallic nanoparticles
Reversible, light-induced structural transitions in metallic nanoparticles, taking the form of surface-driven dynamic phase coexistences, provide an optical nonlinearity suitable for controlling light with light in nanophotonic and plasmonic switching devices. Using low-power diode lasers (giving excitation powers of a few tens of nanowatts per particle) operating at telecom wavelengths, we studied this nonlinearity in gallium nanoparticles grown from atomic beam at the tip of silica optical fiber. The nonlinear response characteristics indicate the occurrence of both solid-solid and solid-liquid transitions and are consistent with an effective medium model for the optical properties of closely-packed nanoparticle films. The megahertz dynamics of light-by-light control in the particle film provide an insight into the kinetics of structural transformations in nanoparticles. Transitions between two solid phases of gallium in the nanoparticles, occurring on application and withdrawal of optical excitation, take considerably less than a microsecond. The transient characteristics of the nonlinearity associated with the solid-liquid transition are dominated by the recrystallization time, which is typically of the order of a microsecond.
Nonlinear optics, Nanoparticles, Structural transitions, Gallium
1077-260X
371-376
MacDonald, K. F.
76c84116-aad1-4973-b917-7ca63935dba5
Soares, B. F.
c9b6c349-36ef-4fa0-9724-e8bbf9e47d54
Bashevoy, M. V.
f45e1ca1-96ab-48d3-94af-534f2f77aaa7
Zheludev, N. I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
MacDonald, K. F.
76c84116-aad1-4973-b917-7ca63935dba5
Soares, B. F.
c9b6c349-36ef-4fa0-9724-e8bbf9e47d54
Bashevoy, M. V.
f45e1ca1-96ab-48d3-94af-534f2f77aaa7
Zheludev, N. I.
32fb6af7-97e4-4d11-bca6-805745e40cc6

MacDonald, K. F., Soares, B. F., Bashevoy, M. V. and Zheludev, N. I. (2006) Controlling light with light via structural transformations in metallic nanoparticles. IEEE Journal of Selected Topics in Quantum Electronics, 12 (3), 371-376. (doi:10.1109/JSTQE.2006.872052).

Record type: Article

Abstract

Reversible, light-induced structural transitions in metallic nanoparticles, taking the form of surface-driven dynamic phase coexistences, provide an optical nonlinearity suitable for controlling light with light in nanophotonic and plasmonic switching devices. Using low-power diode lasers (giving excitation powers of a few tens of nanowatts per particle) operating at telecom wavelengths, we studied this nonlinearity in gallium nanoparticles grown from atomic beam at the tip of silica optical fiber. The nonlinear response characteristics indicate the occurrence of both solid-solid and solid-liquid transitions and are consistent with an effective medium model for the optical properties of closely-packed nanoparticle films. The megahertz dynamics of light-by-light control in the particle film provide an insight into the kinetics of structural transformations in nanoparticles. Transitions between two solid phases of gallium in the nanoparticles, occurring on application and withdrawal of optical excitation, take considerably less than a microsecond. The transient characteristics of the nonlinearity associated with the solid-liquid transition are dominated by the recrystallization time, which is typically of the order of a microsecond.

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More information

Submitted date: 5 June 2005
Published date: 2006
Keywords: Nonlinear optics, Nanoparticles, Structural transitions, Gallium
Organisations: Quantum, Light & Matter Group

Identifiers

Local EPrints ID: 28661
URI: https://eprints.soton.ac.uk/id/eprint/28661
ISSN: 1077-260X
PURE UUID: 5cd20deb-47ea-4171-b155-6792eac061c7
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: 08 May 2006
Last modified: 29 Oct 2019 02:07

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Contributors

Author: K. F. MacDonald ORCID iD
Author: B. F. Soares
Author: M. V. Bashevoy
Author: N. I. Zheludev ORCID iD

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