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Proceedings Paper

Low Threshold Bistability In TiO2-SiO2 Interference Filters
Author(s): F. Mitschke; G. Ankerhold; W. Lange
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Paper Abstract

We have studied optical bistability in Ti02/Si02 interference filters ("hard coatings"). These systems compare favourably with the more conventional ZnSe filters in important characteristics, particularly in durability, switching contrast and long term stability. Unfortunately, switching is very slow. Our analysis reveals a unique mechanism: water molecu)es in pores of the coating are reversibly desorbed from well below the outside surface as the spot temperature is driven up and down by the irradiated light.

Paper Details

Date Published: 8 March 1989
PDF: 6 pages
Proc. SPIE 1017, Nonlinear Optical Materials, (8 March 1989); doi: 10.1117/12.949983
Show Author Affiliations
F. Mitschke, Universitat Hannover (Federal Republic of Germany)
G. Ankerhold, Universitat Hannover (Federal Republic of Germany)
W. Lange, Universitat Hannover (Federal Republic of Germany)

Published in SPIE Proceedings Vol. 1017:
Nonlinear Optical Materials
Gerald Roosen, Editor(s)

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