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28 March 2024
 
  » arxiv » physics/0010017

 Article overview


Nanosecond dynamics of a gallium mirror's light-induced reflectivity change
V. Albanis ; S. Dhanjal ; V. I. Emelyanov ; V. A. Fedotov ; K. F. MacDonald ; P. Petropoulos ; D. J. Richardson ; N. I. Zheludev ;
Date 5 Oct 2000
Subject Optics; General Physics | physics.optics physics.gen-ph
AffiliationDepartment of Physics and Astronomy, University of Southampton, Highfield, Southampton, UK, Optoelectronics Research Centre, University of Southampton, Highfield, Southampton, UK, Department of Physics and International Laser Centre, Moscow State Uni
AbstractTransient pump-probe optical reflectivity measurements of the nano/microsecond dynamics of a fully reversible, light-induced, surface-assisted metallization of gallium interfaced with silica are reported. The metallization leads to a considerable increase in the interface’s reflectivity when solid a-gallium is on the verge of melting. The reflectivity change was found to be a cumulative effect that grows with light intensity and pulse duration. The reflectivity relaxes back to that of alpha-gallium when the excitation is withdrawn in a time that increases critically at gallium’s melting point. The effect is attributed to a non-thermal light-induced structural phase transition.
Source arXiv, physics/0010017
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