Two-Dimensional Polarization Holographic Gratings in Azopolymer Thin Films: Polarization Properties in the Presence or Absence of Surface Relief
نویسندگان
چکیده
During polarization holographic recording in azopolymer thin films, usually together with the volume anisotropic grating, a surface relief grating (SRG) is also formed. By using two consecutive exposures, it possible to obtain two-dimensional (2D) grating. To best of our knowledge, properties such gratings have not been studied yet. determine influence on selectivity 2D gratings, we propose methods suppress SRG formation: by varying conditions or sample structure. In these experiments used commercially available PAZO, poly[1-4-(3-carboxy-4-hydrophenylazo) benzene sulfonamido]-1,2-ethanediyl, sodium salt] perform 442 nm He-Cd laser. As indicated results, when present, strongly dominates response and behaves almost as scalar insensitive Conversely, formation suppressed, all four diffracted orders are very well pronounced. this way, demonstrate that can easily control and, if desired, high modulation, alternatively record polarization-selective virtually no relief.
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ژورنال
عنوان ژورنال: Photonics
سال: 2023
ISSN: ['2304-6732']
DOI: https://doi.org/10.3390/photonics10070728