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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 | Affiliation: | Department 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 | Abstract: | Transient 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 The reflectivity relaxes back to that of alpha-gallium when the excitation is withdrawn in a time that increases critically at gallium’s melting point.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 | Services: | Forum | Review | PDF | Favorites |
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