상세정보
학술지
Photoinduced Chiral Structures in Case of Polarization Holography with Orthogonally Linearly Polarized Beams
- 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
- 협약과제
- 19HR3700, [전문연구실] 홀로그램 영상 서비스를 위한 Holo-TV 핵심 기술 개발, 박중기
- 초록
- 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.
- KSP 제안 키워드
- Holographic gratings, Linearly polarized, Photoinduced chirality, Plane waves, Polarization Azimuth, Polarization holography, Self-rotation, TiO2 nanoparticles, chiral structures, circular birefringence, circularly polarized light