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Proceedings Paper

Semiconductor-to-metallic phase transitions in VO2/gold nanocomposite materials
Author(s): Keith L. Lewis; Andrew M. Pitt; Richard M. Bennett
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Paper Abstract

Vanadium dioxide is well known for its thermochromic characteristics arising from a semiconductor to metallic phase transition at 68 degree(s)C. The optical properties of the material on each side of the phase transition are relatively well established and the change in refractive index as a result of heating allows the exploitation of the material in fast optical switching devices. Whilst switching speeds of the order of a few nanoseconds can be readily achieved, the properties of high temperature phases are less than optimal, due to the imperfect nature of the metallic state. This paper examines the feasibility of enhancing the metallic phase properties through the realisation of a noncomposite formed as a result of the reactive co-sputtering of vanadium and gold in an oxygen environment. The vanandium reacts with oxygen during the reactive sputtering process to produce VO2 whilst the gold is unchanged and appears as a discrete phase in the oxide host.

Paper Details

Date Published: 13 November 2000
PDF: 8 pages
Proc. SPIE 4104, Organic Photorefractives, Photoreceptors, and Nanocomposites, (13 November 2000); doi: 10.1117/12.406482
Show Author Affiliations
Keith L. Lewis, Defence Evaluation and Research Agency Malvern (United Kingdom)
Andrew M. Pitt, Defence Evaluation and Research Agency Malvern (United Kingdom)
Richard M. Bennett, Defence Evaluation and Research Agency Malvern (United Kingdom)

Published in SPIE Proceedings Vol. 4104:
Organic Photorefractives, Photoreceptors, and Nanocomposites
Keith L. Lewis; Klaus Meerholz; Klaus Meerholz, Editor(s)

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