Phase-type gratings formed by photochemical phase transition of polymer azobenzene liquid crystal. 2. Rapid switching of diffraction beams in thin films

被引:42
作者
Yamamoto, T [1 ]
Ohashi, A [1 ]
Yoneyama, S [1 ]
Hasegawa, M [1 ]
Tsutsumi, O [1 ]
Kanazawa, A [1 ]
Shiono, T [1 ]
Ikeda, T [1 ]
机构
[1] Tokyo Inst Technol, Chem Resources Lab, Midori Ku, Yokohama, Kanagawa 2268503, Japan
来源
JOURNAL OF PHYSICAL CHEMISTRY B | 2001年 / 105卷 / 12期
关键词
D O I
10.1021/jp002385d
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Dynamic holographic gratings were investigated with thin films of polymer azobenzene liquid crystals by periodic induction of photochemical nematic-to-isotropic phase transition. On irradiation of writing beams (488 nm), multiple diffraction beams of a reading beam (633 nm) were immediately observed. The first-order diffraction efficiency reached to a maximum value within several tens of milliseconds: the rise time was approximately 50 ms for PM6AB2 films and 30 ms for PA6ABCN films. Quite large modulation in refractive index (similar to0.08) was obtained in both polymer films. Studies on effects of temperature and light intensity on the grating formation suggested that photochemical reactions of azobenzene moieties followed by photochemical phase transition in bright fringes of the interference pattern would be responsible for the formation of holographic gratings. By turning on and off the writing beams, the diffraction beams could be switched dynamically without significant fatigue.
引用
收藏
页码:2308 / 2313
页数:6
相关论文
共 27 条
[1]   HOLOGRAPHIC RECORDING, USING LIQUID-CRYSTALLINE SIDE-CHAIN POLYMERS [J].
ANDERLE, K ;
WENDORFF, JH .
MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 1994, 243 :51-75
[2]   PHOTOCHROMIC LIQUID-CRYSTALLINE POLYMERS MAIN CHAIN AND SIDE-CHAIN POLYMERS CONTAINING AZOBENZENE MESOGENS [J].
ANGELONI, AS ;
CARETTI, D ;
CARLINI, C ;
CHIELLINI, E ;
GALLI, G ;
ALTOMARE, A ;
SOLARO, R ;
LAUS, M .
LIQUID CRYSTALS, 1989, 4 (05) :513-527
[3]  
Bartkiewicz S., 1996, Pure and Applied Optics, V5, P799, DOI 10.1088/0963-9659/5/6/006
[4]   Peptide oligomers for holographic data storage [J].
Berg, RH ;
Hvilsted, S ;
Ramanujam, PS .
NATURE, 1996, 383 (6600) :505-508
[5]   REAL-TIME HOLOGRAPHY IN AZO-DYE-DOPED LIQUID-CRYSTALS [J].
CHEN, AG ;
BRADY, DJ .
OPTICS LETTERS, 1992, 17 (06) :441-443
[6]   2-WAVELENGTH REVERSIBLE HOLOGRAMS IN AZO-DYE DOPED NEMATIC LIQUID-CRYSTALS [J].
CHEN, AG ;
BRADY, DJ .
APPLIED PHYSICS LETTERS, 1993, 62 (23) :2920-2922
[7]   SURFACE-STABILIZED HOLOGRAPHY IN AN AZO-DYE-DOPED LIQUID-CRYSTAL [J].
CHEN, AGS ;
BRADY, DJ .
OPTICS LETTERS, 1992, 17 (17) :1231-1233
[8]   LASER-INDUCED GRATINGS AND SPECTROSCOPY IN MONODOMAINS OF LIQUID-CRYSTALLINE POLYMERS [J].
EICH, M ;
WENDORFF, J .
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, 1990, 7 (08) :1428-1436
[9]   REVERSIBLE DIGITAL AND HOLOGRAPHIC OPTICAL STORAGE IN POLYMERIC LIQUID-CRYSTALS [J].
EICH, M ;
WENDORFF, JH ;
RECK, B ;
RINGSDORF, H .
MAKROMOLEKULARE CHEMIE-RAPID COMMUNICATIONS, 1987, 8 (01) :59-63
[10]  
EICH M, 1987, MAKROMOL CHEM-RAPID, V8, P467