Photoinduced mass transport in azo compounds

International Conference on Functional Materials and Nanotechnologies 2013

材料科学;物理学

Klismeta, K.^1 ; Teteris, J.^1 ; Aleksejeva, J.^1

Institute of Solid State Physics, University of Latvia, 8 Kengaraga Str., LV 1063 Riga, Latvia^1

关键词: Absorbance spectrum;    Electric field vectors;    Holographic recordings;    Linearly polarized;    Photoinduced change;    Photoinduced dichroism;    Polarization modulation;    Surface relief gratings;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/49/1/012036/pdf
DOI  :  10.1088/1757-899X/49/1/012036

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

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.