Photoinduced mass transport in azo compounds

The photoinduced changes of optical properties in azobenzene containing compound thin films were studied under influence of polarized and non-polarized 532 nm laser light. Under influence of light azo compounds experience trans-cis isomerisation process, that can be observed in the absorbance spectr...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2013-01, Vol.49 (1), p.12036-4
Main Authors: Klismeta, K, Teteris, J, Aleksejeva, J
Format: Article
Language:English
Subjects:
Azo compounds
Birefringence
Data storage
Dichroism
Electric fields
Isomerization
Light beams
Linear polarization
Mass transport
Materials science
Optical properties
Optoelectronics
Polarization modulation
Profilometers
Recording
Thin films
Transport
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Summary:The photoinduced changes of optical properties in azobenzene containing compound thin films were studied under influence of polarized and non-polarized 532 nm laser light. Under influence of light azo compounds experience trans-cis isomerisation process, that can be observed in the absorbance spectrum of the sample. If the light is linearly polarized, molecules align perpendicularly to the electric field vector and as a result photoinduced dichroism and birefringence is obtained. If a known lateral polarization modulation of the light beam is present, mass transport of the azobenzene containing compound occurs. By measuring the surface relief with a profilometer the direction of mass transport can be determined. The studies of this work show that direct holographic recording of surface relief gratings can be used in optoelectronics, telecommunications and data storage.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/49/1/012036