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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 15, Iss. 11 — Nov. 1, 1998
  • pp: 2721–2730

Quantum theory and experimental studies of absorption spectra and photoisomerization of azobenzene polymers

Thomas Garm Pedersen, P. S. Ramanujam, Per Michael Johansen, and Søren Hvilsted  »View Author Affiliations


JOSA B, Vol. 15, Issue 11, pp. 2721-2730 (1998)
http://dx.doi.org/10.1364/JOSAB.15.002721


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Abstract

The microscopic properties of azobenzene chromophores are important for a correct description of optical storage systems based on photoinduced anisotropy in azobenzene polymers. A quantum model of these properties is presented and verified by comparison to experimental absorption spectra for trans and cis isomers of cyano methoxy azobenzene. In addition, the transcis quantum efficiency is measured, and hence the combined experimental and theoretical work allows one to determine the essential molecular properties, including magnitude and anisotropy of the absorption cross section and various components of the polarizability tensor for both trans and cis isomers. It is shown that the trans isomer is almost perfectly anisotropic, whereas the cis isomer is approximately isotropic in the plane containing the central CN=NC azobridge. The implications for models of the storage mechanism are discussed.

© 1998 Optical Society of America

OCIS Codes
(160.4890) Materials : Organic materials
(210.4810) Optical data storage : Optical storage-recording materials
(260.5130) Physical optics : Photochemistry
(300.1030) Spectroscopy : Absorption

Citation
Thomas Garm Pedersen, P. S. Ramanujam, Per Michael Johansen, and Søren Hvilsted, "Quantum theory and experimental studies of absorption spectra and photoisomerization of azobenzene polymers," J. Opt. Soc. Am. B 15, 2721-2730 (1998)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-15-11-2721

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