6533b7dcfe1ef96bd1271d84

RESEARCH PRODUCT

<title>Hologram recording in azobenzene oligomers</title>

Mara ReinfeldeAndris OzolsAndris OzolsValdis KamparsValdis Kokars

subject

DiffractionMaterials scienceHolographic gratingbusiness.industryHolographyGratingDiffraction efficiencylaw.inventionchemistry.chemical_compoundOpticsAzobenzenechemistrylawbusinessRefractive indexDiffraction grating

description

Elementary hologram (holographic grating) recording and their coherent optical erasure have been experimentally studied in azobenzene oligomer (ABO) layers differing by their chemical composition, matrices and by the connection type of azobenzene chromophores to the matrix (dispersed or covalently bound). The best holographic parameters (7.9% diffraction efficiency and 86 J/cm2 specific recording energy) were achieved in the samples with covalent bonding to the matrix. Vector recording is also possible. Recording is unstable and reversible. The coherent optical erasure studies have shown its efficiency dependencies on the initial diffraction efficiency, erasing beam intensity and grating period which are different for three groups of ABO samples. The conclusion is made that recording is due to the photoinduced alignment of the azobenzene chromophores followed by refractive index changes. These are the first results and further studies are in progress.© (2003) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

yearjournalcountryeditionlanguage
2003-08-08SPIE Proceedings
https://doi.org/10.1117/12.517010