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학술지 Polarization Holographic Gratings with Enhanced Parameters Recorded in Azopolymer based Nanocomposite Materials
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저자
Dimana Nazarova, Georgi Mateev, Lian Nedelchev, Elena Stoykova, Blaga Blagoeva, Nataliya Berberova, 홍기훈, 박중기
발행일
202101
출처
Optik - International Journal for Light and Electron Optics, v.226 no.2, pp.1-11
ISSN
0030-4026
출판사
Urban & Fischer
DOI
https://dx.doi.org/10.1016/j.ijleo.2020.165882
협약과제
20HH2600, [전문연구실] 홀로그램 영상 서비스를 위한 Holo-TV 핵심 기술 개발, 박중기
초록
We present study of the parameters of polarization holographic gratings recorded in thin films of the azopolymer PAZO (Poly[1-[4-(3-carboxy-4-hydroxyphenylazo) benzenesulfonamido]-1,2-ethanediyl, sodium salt]) and in a composite PAZO-based organic/inorganic material with incorporated TiO2 nanoparticles with size 21 nm and different concentrations. The gratings are inscribed by two plane waves with left and right circular polarization from a He-Cd gas laser (442 nm) at recording angle 20째. 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 diffraction efficiency kinetics is probed at 635 nm and the height of the relief gratings is determined by AFM. Our results indicate that the diffraction efficiency for the hybrid samples is enhanced with respect to the pure azopolymer films. Comparison is also made between polarization response of samples deposited from water and from methanol solution.
키워드
Azopolymer, Birefringence, Nanocomposite, Polarization holography, Surface relief grating, Titanium dioxide
KSP 제안 키워드
5 nm, Anisotropic grating, Holographic gratings, Inorganic material, Methanol solution, Nanocomposite materials, Plane waves, Polarization holography, Surface Relief Grating, TiO2 nanoparticles, circular polarizations(CPs)