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학술지 Photoinduced Chiral Structures in Case of Polarization Holography with Orthogonally Linearly Polarized Beams
Cited 0 time in scopus
저자
Lian Nedelchev, Elena Stoykova, Georgi Mateev, Blaga Blagoeva, Anna Otsetova, Dimana Nazarova, 홍기훈, 박중기
발행일
202004
출처
Optics Communications, v.461, pp.1-5
ISSN
0030-4018
출판사
Elsevier
DOI
https://dx.doi.org/10.1016/j.optcom.2020.125269
협약과제
19HR3700, [전문연구실] 홀로그램 영상 서비스를 위한 Holo-TV 핵심 기술 개발, 박중기
초록
© 2020 Elsevier B.V. Polarization holography offers the possibility to register not only the intensity and phase of light, but also its polarization. When the interfering beams are with orthogonal linear polarizations, in addition to the photoinduced linear birefringence in the media, chiral structures are formed. They strongly influence the properties of the recorded polarization diffraction gratings. In the present work, we study photoinduced chirality in thin films, based on the azopolymer poly[1-[4-(3-carboxy-4-hydroxyphenylazo)benzenesulfonamido]-1,2-ethanediyl, sodium salt], shortly PAZO. Nanocomposite samples are also studied, prepared from the same azopolymer, doped with TiO2 nanoparticles with size 21 nm. Exciting light from a He-Cd laser ({\\lambda} = 442 nm) has been used, with input ellipticity varying from ??1 (left circularly polarized light) to +1 (right circularly polarized light). The dependences of the output ellipticity and the angle of self-rotation of the polarization azimuth on the input ellipticity are presented. This allows us to estimate the effective value of the photoinduced circular birefringence and to evaluate the diffraction efficiency of a polarization holographic grating recorded with two plane waves with orthogonal linear polarizations.
키워드
Azopolymer, Linear and circular birefringence, Nanocomposites, PAZO, Photoinduced chirality, Polarization holography
KSP 제안 키워드
Holographic grating, Linearly polarized, Photoinduced chirality, Plane waves, Polarization Azimuth, Polarization holography, Self-rotation, TiO2 nanoparticles, chiral structures, circular birefringence, circularly polarized light