Diffraction from polarization holographic gratings with surface relief in side-chain azobenzene polyesters

I Naydenova, L Nikolova, T Todorov, NCR Holme, PS Ramanujam, Søren Hvilsted

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

We investigate the polarization properties of holographic gratings in side-chain azobenzene polyesters in which an anisotropic grating that is due to photoinduced linear and circular birefringence is recorded in the volume of the material and a relief grating appears on the surface. A theoretical model is proposed to explain the experimental results, making it possible to understand the influence of the different photoinduced effects. It is shown that at low intensity the polarization properties of the diffraction at these gratings are determined by the interaction of the linear and circular photobirefringences, and at larger intensity the influence of the surface relief dominates the effect of the circular anisotropy. Owing to the high recording efficiency of the polyesters, the +/-1-order diffracted waves change the polarization interference pattern during the holographic recording, resulting in the appearance of a surface relief with doubled frequency.
Original languageEnglish
JournalOptical Society of America. Journal B: Optical Physics
Volume15
Issue number4
Pages (from-to)1257-1265
ISSN0740-3224
DOIs
Publication statusPublished - Apr 1998

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