Light induced anisotropy and gyrotropy in the media on the basis of azo indicators

Valentina Shaverdova; Svetlana Petrova; Anna Purtseladze; Lado Tarasashvili; Nino Obolashvili

doi:10.1117/12.873172

7 February 2011 Light induced anisotropy and gyrotropy in the media on the basis of azo indicators

Valentina Shaverdova, Svetlana Petrova, Anna Purtseladze, Lado Tarasashvili, Nino Obolashvili

Proceedings Volume 7957, Practical Holography XXV: Materials and Applications; 79570U (2011) https://doi.org/10.1117/12.873172
Event: SPIE OPTO, 2011, San Francisco, California, United States

Abstract

Azo indicators are well known in which when changing acidity they changes their properties. It was natural to expect also their appreciable changes of their polarization properties. The results of the carried out experimental research in recording media on the basis of azo indicators- homolog of the Methyl orange introduced into the polymeric matrix are presented in this work. According to the technology developed by us, the samples for the reception of which solvents with various degree of acidity, within values pH 1.68-12.45 have been created. Samples were irradiated by the light of argon laser (488 nm) actinic for them. Measurement of light induced anisotropy was carried out on a registering recorder and can be described by means of one parameter- the effective anisotropy. As standards the samples of dyes for the reception of which neutral solvent was used have been considered. In a number of dyes the values of effective anisotropy in alkaline and acid media exceed its values concerning corresponding standards. The higher homolog -Heptyl orange and Benzyl orange which are weak or insoluble in water, become water-soluble when using solvents both with acid and alkaline reaction. The interval of appearance of light induced anisotropy has been expanded. We have used the method of the zero-ellipsometry for the research arising in the same samples light induced gyrotropy. Values of circular dichroism and circular birefringence in investigated layers in neutral media have been calculated also at various values pH. In the work the received results are discussed and analyzed.

Citation Download Citation

Valentina Shaverdova, Svetlana Petrova, Anna Purtseladze, Lado Tarasashvili, and Nino Obolashvili "Light induced anisotropy and gyrotropy in the media on the basis of azo indicators", Proc. SPIE 7957, Practical Holography XXV: Materials and Applications, 79570U (7 February 2011); https://doi.org/10.1117/12.873172

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