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Polarized 3D Raman and nanoscale near-field optical microscopy of optically inscribed surface relief gratings

  • We have used polarized confocal Raman microspectroscopy and scanning near-field optical microscopy with a resolution of 60 nm to characterize photoinscribed grating structures of azobenzene doped polymer films on a glass support. Polarized Raman microscopy allowed determining the reorientation of the chromophores as a function of the grating phase and penetration depth of the inscribing laser in three dimensions. We found periodic patterns, which are not restricted to the surface alone, but appear also well below the surface in the bulk of the material. Near-field optical microscopy with nanoscale resolution revealed lateral two-dimensional optical contrast, which is not observable by atomic force and Raman microscopy.

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Author details:Giuseppe Di Florio, Erik Bründermann, Nataraja Sekhar Yadavalli, Svetlana SanterORCiDGND, Martina Havenith
Subtitle (English):chromophore orientation in azo-doped polymer films
Publication series (Volume number):Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe (247)
Publication type:Postprint
Date of first publication:2013/12/09
Completion year:2013
Publishing institution:Universität Potsdam
Release date:2016/09/06
Tag:alignment; amorphous polymers; chain azobenzene polymers; data-storage; dye; glass-transition temperature; holographic diffraction gratings; molecular-reorientation; photoisomerization; thin-films
First page:1544
Last Page:1554
Source:Soft Matter (2014) Nr. 10, S. 1544-1554. - DOI: 10.1039/C3SM51787J
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie
DDC classification:5 Naturwissenschaften und Mathematik / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften
Peer review:Referiert
Publishing method:Open Access
License (German):License LogoUrheberrechtsschutz