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Proceedings Paper

Birefringence induced in azopolymer (PAZO) films with different thickness
Author(s): Lian Nedelchev; Dimana Nazarova; Georgi Mateev; Nataliya Berberova
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Paper Abstract

In this article we present a study of the photoinduced birefringence (Δn) in films of a water soluble azopolymer: poly[1- [4-(3-carboxy-4-hydroxyphenylazo)benzenesulfonamido]-1,2-ethanediyl, sodium salt] (PAZO). Varying the concentration of the azopolymer in the solution, films with wide range of thicknesses are obtained – from 50 to 2500 nm. The film thickness is determined with a Talystep precision profilometer. Birefringence is measured using a polarimetric setup with a recording laser at 473 nm and probe He-Ne laser at 633 nm. As shown experimentally, the maximal photoinduced birefringence (Δnmax) does not depend on the thickness and is of the order of 0.07 for all of the investigated samples. The recording time however considerably increases for films thicker than 500 nm.

Paper Details

Date Published: 8 January 2015
PDF: 7 pages
Proc. SPIE 9447, 18th International School on Quantum Electronics: Laser Physics and Applications, 94471I (8 January 2015); doi: 10.1117/12.2176158
Show Author Affiliations
Lian Nedelchev, Institute of Optical Materials and Technologies (Bulgaria)
Dimana Nazarova, Institute of Optical Materials and Technologies (Bulgaria)
Georgi Mateev, Institute of Optical Materials and Technologies (Bulgaria)
Nataliya Berberova, Institute of Optical Materials and Technologies (Bulgaria)


Published in SPIE Proceedings Vol. 9447:
18th International School on Quantum Electronics: Laser Physics and Applications
Tanja Dreischuh; Sanka Gateva; Alexandros Serafetinides, Editor(s)

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