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Title: Light-induced structural transition and reflectivity of a silica-gallium interface
Author: Albanis, Vassilios
ISNI:       0000 0001 3409 9086
Awarding Body: University of Southampton
Current Institution: University of Southampton
Date of Award: 2003
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A broadband optical reflectometer with built-in thermal sample control was developed to study the linear properties of planar silica-gallium interfaces in the continuous range from 450 nm to 1650 nm with increasing and decreasing temperature in the range 12 °C to 36°C, across the solid to melt phase transition. Transient pump-probe reflectivity measurements revealed the dynamics of a silica-gallium interface reflectivity change in the visible part of the spectrum for the first time. Reflectivity rise times of a few ps were observed and the accumulative nature of the reflectivity change with pump energy was seen. Recovery times of 1.2 μs just below melting were recorded for pump pulse duration of 0.4 μs. Thermal and non-thermal mechanisms of the reflectivity change have been identified and related to the properties of the interface
Supervisor: Zheludev, Nikolai Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: TK Electrical engineering. Electronics Nuclear engineering ; QC Physics