Atomic force and optical near-field microscopic investigations of polarization holographic gratings in a liquid crystalline azobenzene side-chain polyester

P.S. Ramanujam, N.C.R. Holme, S. Hvilsted

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Atomic force and scanning near-field optical microscopic investigations have been carried out on a polarization holographic grating recorded in an azobenzene side-chain Liquid crystalline polyester. It has been found that immediately following laser irradiation, a topographic surface grating structure appears. The time development of the grating structure was followed by atomic force microscopy for 20 h by repeatedly scanning the same area of the film. The grating structure disappears after a few hours and a pronounced increase of surface roughness has been found to take place. A near-field optical microscopic scanning of the grating reveals, however, that the bulk of the film remains optically anisotropic. (C) 1996 American Institute of Physics.
    Original languageEnglish
    JournalApplied Physics Letters
    Volume68
    Issue number10
    Pages (from-to)1329-1331
    ISSN0003-6951
    DOIs
    Publication statusPublished - 4 Mar 1996

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