<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>In holography, more attractive have become azobenzene compounds doped in a polymer matrix (host-guest polymer film) or chemically attached to the polymer. Azobenzene molecules exhibit reversible photoisomerization between <italic>trans</italic>- and <italic>cis</italic>-isomers which can form a surface relief grating in the films. The authors investigate the holographic recording and formation of surface relief gratings in a host-guest polymer film with two original azobenzene compounds. Holographic recording with 325 nm laser light was performed in host-guest polymer films with the host being polymethylmetacrylate (PMMA) and the guest - 15 wt% azobenzene molecules (A-45 or A-48). In both cases an increase in the diffraction efficiency at the beginning of the process could be related to the <italic>trans-cis</italic>-photoisomerization, while the second increase - to the formation of surface relief gratings. The systems with A-45 molecules reach a diffraction efficiency of 0.7%, and with A-48 molecules - of 0.24%. Also, the depth of surface relief gratings is greater in the films with A-45 (35 to 45 nm) than in those with A-48 (4 to 6 nm) molecules.</p></abstract>

In holography, more attractive have become azobenzene compounds doped in a polymer matrix (host-guest polymer film) or chemically attached to the polymer. Azobenzene molecules exhibit reversible photoisomerization between trans- and cis-isomers which can form a surface relief grating in the films. The authors investigate the holographic recording and formation of surface relief gratings in a host-guest polymer film with two original azobenzene compounds. Holographic recording with 325 nm laser light was performed in host-guest polymer films with the host being polymethylmetacrylate (PMMA) and the guest - 15 wt% azobenzene molecules (A-45 or A-48). In both cases an increase in the diffraction efficiency at the beginning of the process could be related to the trans-cis-photoisomerization, while the second increase - to the formation of surface relief gratings. The systems with A-45 molecules reach a diffraction efficiency of 0.7%, and with A-48 molecules - of 0.24%. Also, the depth of surface relief gratings is greater in the films with A-45 (35 to 45 nm) than in those with A-48 (4 to 6 nm) molecules.

Optically Induced Surface Relief Gratings in Polymer Films Doped With Sulphonyl Group Containing Azobenzene

Institute of Solid State Physics, University of Latvia, 8 Kengaraga Str., Riga, LATVIA

Latvian Institute of Organic Synthesis, 21 Aizkraukles Str., Riga, LATVIA

Latvian Journal of Physics and Technical Sciences

In holography, more attractive have become azobenzene compounds doped in a polymer matrix (host-guest polymer film) or chemically attached to the polymer....

Optically Induced Surface Relief Gratings in Polymer Films Doped With Sulphonyl Group Containing Azobenzene

Pubblicato online: 22 set 2010

Pagine: 51 - 58

DOI: https://doi.org/10.2478/v10047-010-0018-x

Parole chiave
azobenzene compounds, photoisomerization, holographic recording, surface relief gratings, host-guest polymer film

This content is open access.

Optically Induced Surface Relief Gratings in Polymer Films Doped With Sulphonyl Group Containing Azobenzene

Pubblicato online: 22 set 2010

Pagine: 51 - 58

DOI: https://doi.org/10.2478/v10047-010-0018-x

Parole chiaveazobenzene compounds, photoisomerization, holographic recording, surface relief gratings, host-guest polymer film

This content is open access.

Parole chiave
azobenzene compounds, photoisomerization, holographic recording, surface relief gratings, host-guest polymer film