期刊
OPTICAL MATERIALS
卷 64, 期 -, 页码 212-216出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optmat.2016.12.002
关键词
Nanomaterials; Anisotropic optical materials; Photosensitive materials; Diffraction gratings; Polarization, other optical properties; Optical storage-recording materials
资金
- Bulgarian Science Fund [FNI-T-02/26, DCOST 01/7, H 08/20]
- Ministry of Science and Technology (MOST), Taiwan [MOST 103-2221-E-009-079, 104-2221-E-009-164, 104-2221-E-009-151, 103-2911-I-009-516]
Recently, a birefringence enhancement effect was observed in azopolymers doped with various nano particles. The paper presents comparison between the parameters of polarization holographic gratings recorded in a pure azopolymer PAZO (Poly[1-[4(3-carboxy-4-hydroxyphenylazo) benzenesulfonamido]1,2-ethanediyl, sodium salt]) and in a hybrid PAZO-based organic/inorganic material with incorporated ZnO nanoparticles of size less than 50 nm. Laser emitting at 491 nm is used for the holographic recording. Along with the anisotropic grating in the volume of the media, surface relief is also formed. Gratings with different spatial frequencies are obtained by varying the recording angle. The time dependence of the diffraction efficiency is probed at 635 nm and the height of the relief gratings is determined by AFM. Our results indicate that both the diffraction efficiency and the height of the surface relief for the hybrid samples are enhanced with respect to the pure azopolymer films. (C) 2016 Elsevier B.V. All rights reserved.
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