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

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posted on 2006-04-12, 16:22 authored by K.F. MacDonald, V.A. Fedotov, S. Pochon, G. Stevens, Feodor Kusmartsev, N.I. Zheludev
We have observed reversible structural transformations, induced by optical excitation at 1.55 micrometer, between the beta, gamma 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 critically at the transition temperature.

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School

  • Science

Department

  • Physics

Pages

270531 bytes

Publication date

2003

Notes

This is a pre-print. It is also available at: http://arxiv.org/abs/cond-mat/0312464.

Language

  • en

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