Synthesis and optical storage properties of a thiophene-based holographic recording

Avtar Matharu, S. Jeeva, P.R. Huddleston, P.S. Ramanujam

    Research output: Contribution to journalJournal articleResearchpeer-review


    The results of the fabrication and optical data storage characteristics of a novel azothiophene polyester 9 for potential holographic storage are reported. The polyester is derived from an azothiophene diol 1 and diphenyl phthalate 8 via in vacuo melt transesterification. Inclusion of a 5-methoxy-2-thienyl moiety generates a trans pi-pi* transition centered close to 405 nm. An investigation of the optical data storage characteristics of a solution cast film of azopolyester with a thickness of 65 mm is summarised. The optical anisotropy induced by a 532 nm frequency doubled YAG laser and probed at a wavelength of 633 nm outside the absorption band with a polarimeter reveals a very high induced anisotropy of 7 rad ( laser intensity, 250 mW cm(-2)). The calculated birefringence of the film is 0.02 per micron. Maximum anisotropy is reached after approximately 70 s of irradiation. The induced anisotropy disappears at approximately 90 degrees C. Room temperature stable gratings can be inscribed with high diffraction efficiency.
    Original languageEnglish
    JournalJournal of Materials Chemistry
    Issue number42
    Pages (from-to)4477-4482
    Publication statusPublished - 2007


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