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Effect of surface rubbing alignment on electro-optical properties of holographic polymer dispersed liquid-crystal gratings

Li Wen-Cui Liu Yong-Gang Xuan Li

Effect of surface rubbing alignment on electro-optical properties of holographic polymer dispersed liquid-crystal gratings

Li Wen-Cui, Liu Yong-Gang, Xuan Li
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  • In order to obtain holographic polymer dispersed liquid crystal( HPDLC) grating with high diffraction efficiency and low threshold, the effect of parallel rubbing alignment on electro-optical properties of HPDLC grating is investigated. According to the theoretical analysis, the improvement of phase separation structure and the lower order difference of the liquid crystal droplets are essential for perfect electro-optical properties of the grating. The phase separation is significantly improved due to the diffusion match between monomers and liquid crystals in the case of parallel alignment treatment. So the diffraction capability is enhanced while the driven voltage is reduced obviously. Moreover, the order difference of liquid crystal droplets is reduced because of the uniform liquid crystal alignments and consequently the scattering loss is reduced greatly. Experimental results indicate that the diffraction efficiency of grating with rubbing alignment increases from 75.6% (traditional HPDLC grating) to 98.1% and the driving voltage is lowered from 9.2 V/μm to 4.8 V/μm. And also, only in the case of certain surface rubbing strength, the HPDLC with high diffraction efficiency and low threshold will be realized.
    • Funds:
    [1]

    Natarajan L V, Sutherland R L, Tondiglia V P, Bunning T J, Adams W W 1994 Appl.Phys.Lett. 64 1074

    [2]

    Sutherland R L, Natarajan LV, Tondiglia V P 1993 Chem.Mater. 5 1533

    [3]

    Wu N, Zhang S W, Song K P, Bayin H X E,Qi X D,Gao J X 2009 Optics and Precision Engineering 17 1497(in Chinese)[吴 娜、张善文、宋可平、巴音贺希格、齐向东、高键翔 2009 光学精密工程 17 1497]

    [4]

    Tan X,Liu Y,Xu X D,Hong Y L, Fu S J 2009 Optics and Precision Engineering 17 33(in Chinese)[谭 鑫、刘 颖、徐向东、洪义麟、付绍军 2009 光学精密工程 17 33]

    [5]

    Liu L H, Liu G, Xiong X Y, Huang X L,Chen J, Li W J,Tian J P, Tian Y C 2009 Optics and Precision Engineering 17 72(in Chinese)[柳龙华、刘 刚、熊 瑛、黄新龙、陈 洁、李文杰、田金萍、田扬超 2009 光学精密工程 17 72]

    [6]

    Tanaka K, KatoK, Date M 1999 Jpn.J.Appl.Phys. 38 277

    [7]

    Popovich M, Sagan S 2000 SID International Symposium Digest of Technical Papers 31 1060

    [8]

    Fiske T G, Silverstein L D, Colegrove J, Yuan H 2000 SID International Symposium Digest of Technical Papers 31 1134

    [9]

    Domash L H, Crawford G P, Ashmead A C, Smith R T,Popovich M M,Storey J 2000 SPIE 4107 46

    [10]

    Zheng Z G, Li W C, Liu Y G, Xuan L 2008 Acta Phys. Sin.57 7344(in Chinese)[郑致刚、李文萃、刘永刚、宣 丽 2008 物理学报 57 7344]

    [11]

    Wu S T, Mo T S, Guey A Y 2001 Appl. Phys. 40 6441

    [12]

    Roper T M, Kwee T, Lee T Y, Guymon C A, Hoyle C E 2004 Polymer 45 2921

    [13]

    Wofford J M, Natarajan L V,Tondiglia V P 2006 SPIE 63320Q

    [14]

    Song J, Zheng Z G, Liu Y G, Li J, Xuan L 2006 Chinese Journal of Liquid Crystals and displays 21 443(in Chinese)[宋 静、郑致刚、刘永刚、李 静、宣 丽 2006 液晶与显示 21 443]

    [15]

    White T J, Liechty W B, Natarajan L V 2006 Polymer 47 2289

    [16]

    Caputo G, Zgonik M 1997 Phys.Rew.E 55 1035

    [17]

    Sutherland R L, Tondiglia V P, Natarajan L V 2006 J. Appl. Phys. 99 123104

    [18]

    Wu B G, Erdmann J H, Doane J W 1989 Liq.Cryst.5 453

    [19]

    Zheng Z G, Ma J,Liu Y G, Xuan L 2008 J.Phys.D:Appl.Phys.41 235302 10

  • [1]

    Natarajan L V, Sutherland R L, Tondiglia V P, Bunning T J, Adams W W 1994 Appl.Phys.Lett. 64 1074

    [2]

    Sutherland R L, Natarajan LV, Tondiglia V P 1993 Chem.Mater. 5 1533

    [3]

    Wu N, Zhang S W, Song K P, Bayin H X E,Qi X D,Gao J X 2009 Optics and Precision Engineering 17 1497(in Chinese)[吴 娜、张善文、宋可平、巴音贺希格、齐向东、高键翔 2009 光学精密工程 17 1497]

    [4]

    Tan X,Liu Y,Xu X D,Hong Y L, Fu S J 2009 Optics and Precision Engineering 17 33(in Chinese)[谭 鑫、刘 颖、徐向东、洪义麟、付绍军 2009 光学精密工程 17 33]

    [5]

    Liu L H, Liu G, Xiong X Y, Huang X L,Chen J, Li W J,Tian J P, Tian Y C 2009 Optics and Precision Engineering 17 72(in Chinese)[柳龙华、刘 刚、熊 瑛、黄新龙、陈 洁、李文杰、田金萍、田扬超 2009 光学精密工程 17 72]

    [6]

    Tanaka K, KatoK, Date M 1999 Jpn.J.Appl.Phys. 38 277

    [7]

    Popovich M, Sagan S 2000 SID International Symposium Digest of Technical Papers 31 1060

    [8]

    Fiske T G, Silverstein L D, Colegrove J, Yuan H 2000 SID International Symposium Digest of Technical Papers 31 1134

    [9]

    Domash L H, Crawford G P, Ashmead A C, Smith R T,Popovich M M,Storey J 2000 SPIE 4107 46

    [10]

    Zheng Z G, Li W C, Liu Y G, Xuan L 2008 Acta Phys. Sin.57 7344(in Chinese)[郑致刚、李文萃、刘永刚、宣 丽 2008 物理学报 57 7344]

    [11]

    Wu S T, Mo T S, Guey A Y 2001 Appl. Phys. 40 6441

    [12]

    Roper T M, Kwee T, Lee T Y, Guymon C A, Hoyle C E 2004 Polymer 45 2921

    [13]

    Wofford J M, Natarajan L V,Tondiglia V P 2006 SPIE 63320Q

    [14]

    Song J, Zheng Z G, Liu Y G, Li J, Xuan L 2006 Chinese Journal of Liquid Crystals and displays 21 443(in Chinese)[宋 静、郑致刚、刘永刚、李 静、宣 丽 2006 液晶与显示 21 443]

    [15]

    White T J, Liechty W B, Natarajan L V 2006 Polymer 47 2289

    [16]

    Caputo G, Zgonik M 1997 Phys.Rew.E 55 1035

    [17]

    Sutherland R L, Tondiglia V P, Natarajan L V 2006 J. Appl. Phys. 99 123104

    [18]

    Wu B G, Erdmann J H, Doane J W 1989 Liq.Cryst.5 453

    [19]

    Zheng Z G, Ma J,Liu Y G, Xuan L 2008 J.Phys.D:Appl.Phys.41 235302 10

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Publishing process
  • Received Date:  03 February 2010
  • Accepted Date:  16 July 2010
  • Published Online:  15 April 2011

Effect of surface rubbing alignment on electro-optical properties of holographic polymer dispersed liquid-crystal gratings

  • 1. State Key Laboratory of Applied Optics,Changchun Institute of Optics, Fine Mechanics and Physics,Chinese Academy of Sciences, Changchun 130033, China

Abstract: In order to obtain holographic polymer dispersed liquid crystal( HPDLC) grating with high diffraction efficiency and low threshold, the effect of parallel rubbing alignment on electro-optical properties of HPDLC grating is investigated. According to the theoretical analysis, the improvement of phase separation structure and the lower order difference of the liquid crystal droplets are essential for perfect electro-optical properties of the grating. The phase separation is significantly improved due to the diffusion match between monomers and liquid crystals in the case of parallel alignment treatment. So the diffraction capability is enhanced while the driven voltage is reduced obviously. Moreover, the order difference of liquid crystal droplets is reduced because of the uniform liquid crystal alignments and consequently the scattering loss is reduced greatly. Experimental results indicate that the diffraction efficiency of grating with rubbing alignment increases from 75.6% (traditional HPDLC grating) to 98.1% and the driving voltage is lowered from 9.2 V/μm to 4.8 V/μm. And also, only in the case of certain surface rubbing strength, the HPDLC with high diffraction efficiency and low threshold will be realized.

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