CONTROL OF AN EASY-AXIS ON NEMATIC-POLYMER INTERFACE BY LIGHT ACTION TO NEMATIC BULK

被引:126
作者
VOLOSHCHENKO, D [1 ]
KHYZHNYAK, A [1 ]
REZNIKOV, Y [1 ]
RESHETNYAK, V [1 ]
机构
[1] UKRAINIAN ACAD SCI,INST SURFACE CHEM,KIEV 252650,UKRAINE
来源
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1995年 / 34卷 / 2A期
关键词
LIQUID CRYSTAL ALIGNMENT; AZO DYE; LIGHT ABSORPTION; ADSORPTION OF ORGANIC MOLECULES;
D O I
10.1143/JJAP.34.566
中图分类号
O59 [应用物理学];
学科分类号
摘要
An appearance of an easy orientation axis of a nematic liquid crystal on the isotropic aligning surface under the light absorption by in-bulk azo dye molecules is observed. It is shown that orientation of LC molecules in the irradiated region is close to the direction of the exciting beam polarization. Accompanying to aligning, the surface driven reorientation effect has been studied. A threshold as well as a nonthreshold reorientation of the director toward the light-induced easy axis were observed. The value of the light-induced anchoring energy depends on the exposure time and achieves 2.5x10(-3)erg/cm(2). The experimental data are explained within the framework of adsorption of phototransformed molecules from the LC bulk onto the aligning surface.
引用
收藏
页码:566 / 571
页数:6
相关论文
共 18 条
  • [1] Blinov L. M., 1983, ELECTROOPTICAL MAGNE
  • [2] REAL-TIME HOLOGRAPHY IN AZO-DYE-DOPED LIQUID-CRYSTALS
    CHEN, AG
    BRADY, DJ
    [J]. OPTICS LETTERS, 1992, 17 (06) : 441 - 443
  • [3] DEGENNES PG, 1993, PHYSICS LIQUID CRYST
  • [4] DYADYUSHA AG, 1991, UKR FIZ ZH+, V36, P1059
  • [5] DYADYUSHA AG, 1992, JETP LETT+, V56, P17
  • [6] SURFACE-MEDIATED ALIGNMENT OF NEMATIC LIQUID-CRYSTALS WITH POLARIZED LASER-LIGHT
    GIBBONS, WM
    SHANNON, PJ
    SUN, ST
    SWETLIN, BJ
    [J]. NATURE, 1991, 351 (6321) : 49 - 50
  • [7] REVERSIBLE CHANGE IN ALIGNMENT MODE OF NEMATIC LIQUID-CRYSTALS REGULATED PHOTOCHEMICALLY BY COMMAND SURFACES MODIFIED WITH AN AZOBENZENE MONOLAYER
    ICHIMURA, K
    SUZUKI, Y
    SEKI, T
    HOSOKI, A
    AOKI, K
    [J]. LANGMUIR, 1988, 4 (05) : 1214 - 1216
  • [8] ALIGNMENT CONTROL OF A LIQUID-CRYSTAL ON A PHOTOSENSITIVE POLYVINYLALCOHOL FILM
    IIMURA, Y
    KUSANO, J
    KOBAYASHI, S
    AOYAGI, Y
    SUGANO, T
    [J]. JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS, 1993, 32 (1A-B): : L93 - L96
  • [9] Jenkins F. A., 1976, FUNDAMENTALS OPTICS, P1746
  • [10] KAWANISHI Y, 1994, ACS S SERIES, V537, pCH31