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Controlling the coexistence of structural phases and the optical properties of gallium nanoparticles with optical excitation

Controlling the coexistence of structural phases and the optical properties of gallium nanoparticles with optical excitation
Controlling the coexistence of structural phases and the optical properties of gallium nanoparticles with optical excitation
We have observed reversible structural transformations, induced by optical excitation at 1.55 ?m, between the ?, ? and liquid phases of gallium in self-assembled gallium nanoparticles, with a narrow size distribution around 50 nm, on the tip of an optical fiber. Only a few tens of nanowatts of optical excitation per particle are required to control the transformations, which take the form of a dynamic phase coexistence and are accompanied by substantial changes in the optical properties of the nanoparticle film. The time needed to achieve phase equilibrium is in the microsecond range, and increases sharply near the transition temperatures.
Nanoparticles, Opitcal properties, Structural transition
0295-5075
614-619
MacDonald, K. F.
76c84116-aad1-4973-b917-7ca63935dba5
Fedotov, V. A.
3725f5cc-2d0b-4e61-95c5-26d187c84f25
Pochon, S.
8839cdca-fe45-4dee-b102-c75003565a84
Stevens, G. C.
1afb61b6-e12f-4176-8801-68a0a83a4aee
Kusmartsev, F. V.
d4556e79-3ade-4776-9f1f-6e30d328f67b
Emel’yanov, V. I.
1e603547-1340-4132-9448-c9a9f8f05bda
Zheludev, N. I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
MacDonald, K. F.
76c84116-aad1-4973-b917-7ca63935dba5
Fedotov, V. A.
3725f5cc-2d0b-4e61-95c5-26d187c84f25
Pochon, S.
8839cdca-fe45-4dee-b102-c75003565a84
Stevens, G. C.
1afb61b6-e12f-4176-8801-68a0a83a4aee
Kusmartsev, F. V.
d4556e79-3ade-4776-9f1f-6e30d328f67b
Emel’yanov, V. I.
1e603547-1340-4132-9448-c9a9f8f05bda
Zheludev, N. I.
32fb6af7-97e4-4d11-bca6-805745e40cc6

MacDonald, K. F., Fedotov, V. A., Pochon, S., Stevens, G. C., Kusmartsev, F. V., Emel’yanov, V. I. and Zheludev, N. I. (2004) Controlling the coexistence of structural phases and the optical properties of gallium nanoparticles with optical excitation. Europhysics Letters, 67 (4), 614-619. (doi:10.1209/epl/i2003-10302-1).

Record type: Article

Abstract

We have observed reversible structural transformations, induced by optical excitation at 1.55 ?m, between the ?, ? and liquid phases of gallium in self-assembled gallium nanoparticles, with a narrow size distribution around 50 nm, on the tip of an optical fiber. Only a few tens of nanowatts of optical excitation per particle are required to control the transformations, which take the form of a dynamic phase coexistence and are accompanied by substantial changes in the optical properties of the nanoparticle film. The time needed to achieve phase equilibrium is in the microsecond range, and increases sharply near the transition temperatures.

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Published date: 15 August 2004
Keywords: Nanoparticles, Opitcal properties, Structural transition

Identifiers

Local EPrints ID: 28648
URI: https://eprints.soton.ac.uk/id/eprint/28648
ISSN: 0295-5075
PURE UUID: 082192cf-1072-4bb9-9b63-a50d09fd38f9
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: 02 May 2006
Last modified: 26 Nov 2019 02:03

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Contributors

Author: K. F. MacDonald ORCID iD
Author: V. A. Fedotov
Author: S. Pochon
Author: G. C. Stevens
Author: F. V. Kusmartsev
Author: V. I. Emel’yanov
Author: N. I. Zheludev ORCID iD

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