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The concepts of polymer dispersed liquid crystal (PDLC) and stressed liquid crystal (SLC) are introduced; the three kinds of definitions, i.e., “positive piezo-optical effect”, “negative piezo-optical effect” and “inverse mode piezo-optical effect” of PDLC switchable glass are given. The new types of stressed switchable glass samples of negative piezo-optical effect and inverse mode piezo-optical effect are prepared. The experimental results show that the haze is above 90% in a scattering state and the transmittance is nearly 30% in a translucent state. The principle of piezo-optical effect is analyzed with polarization microscopy. The results show that the vertical surface pressure or stretching stress applied to the sample will result in the special reorientation of LC molecules in LC droplets, which causes the optical characteristics of the sample to change significantly. The mode of vertical stretched liquid crystal droplet is proposed, the computation results and graph plotting conform with the results from the micrographs of polarizing microscope very well, so that the experimental phenomena are reasonably explained. The research on SLC piezo-optical effect has the fundamental significance for studying the PDLC and the application value for developing non-electro-optic switchable glass.
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Keywords:
- stressed liquid crystals /
- positive piezo-optical effect /
- negative piezo-optical effect /
- inverse mode piezo-optical effect
[1] Drzaic P 2006 Liquid Cryst. 33 1281
[2] Doane J W 2006 Liquid Cryst. 33 1313
[3] Wu B G, West J L, Doane J W 1987 J. Appl. Phys. 62 3925
[4] Deng S P, Li W C, Huang W B, Liu Y G, Peng Z H, Lu X H, Xuan L 2011 Acta Phys．Sin. 60 086103 (in Chinese) [邓舒鹏, 李文翠, 黄文彬, 刘永刚, 鲁兴涵, 宣丽 2011 60 086103]
[5] Chen K, Cheng J Q, Xiao Y, Tang D G, Huang M J 2009 Acta Phys. Sin. 58 1007 (in Chinese) [陈珂, 程建群, 肖勇, 唐道广, 黄明举 2009 58 1007]
[6] Zhang Z G, Li W c, Liu Y G, Xuan L 2008 Acta Phys. Sin. 57 7344 (in Chinese) [郑致刚, 李文翠, 刘永刚, 宣丽 2008 57 7344]
[7] Zheng Z G, Ma J, Song J, Liu Y G, Hu L F, Xuan L 2007 Acta Phys. Sin. 56 15 (in Chinese) [郑致刚, 马骥, 宋静, 刘永刚, 胡立发, 宣丽 2007 56 15]
[8] Zhang B, Liu Y J, Xu K S 2004 Acta Phys. Sin. 53 1850 (in Chinese) [张斌, 刘言军, 徐克璹 2004 53 1850]
[9] Ding J D, Yang Y L 1992 Jpn. J. Appl. Phys. 2837
[10] West J L, Zhang Z, Zhang M, Byktanir E, Glushchenko A 2005 SPIE 5936 59360L-1
[11] Amimori I, Priezjev N V, Pelcovits R A, Crawford G P 2003 J. Appl. Phys. 93 3248
[12] Ermold M L, Rai K, Fontecchio A K 2005 J. Appl. Phys. 97 104905
[13] Zhang G Q 2006 Ph. D. Dissertation (USA: Kent University)
[14] Fan Z X, Zhang Z D, Xie Y J 2009 China Patent CN101430449 [范志新, 张志东, 解一军 2009 中国专利 CN101430449]
[15] Fan Z X, Xie Y J, Liu Y, Zhang Z D 2012 China Patent CN102799015A [范志新, 解一军, 刘洋, 张志东 2012 中国专利 CN102799015A]
[16] Fan Z X, Xie Y J, Wei X D, Xie H J, Song X H, Wang D, Sun Y B 2011 Acta Opt. Sin. 31 0131005 (in Chinese) [范志新, 解一军, 魏向东, 解会杰, 宋新华, 王丹, 孙玉宝 2011 光学学报 31 0131005]
[17] Li Z Y, Fan Z X, Li J W, Zhao Y F, Sun Y B 2011 Acta Opt. Sin. 31 0816001 (in Chinese) [黎振远, 范志新, 李金炜, 赵永芳, 孙玉宝 2011 光学学报 31 0816001]
[18] Wang X J 2006 The Optics of Liquid Crystal and the Liquid Crystal Displays (Beijing, Science Press) p168 (in Chinese) [王新久 2006 液晶光学和液晶显示 (北京, 科学出版社) 第168页]
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[1] Drzaic P 2006 Liquid Cryst. 33 1281
[2] Doane J W 2006 Liquid Cryst. 33 1313
[3] Wu B G, West J L, Doane J W 1987 J. Appl. Phys. 62 3925
[4] Deng S P, Li W C, Huang W B, Liu Y G, Peng Z H, Lu X H, Xuan L 2011 Acta Phys．Sin. 60 086103 (in Chinese) [邓舒鹏, 李文翠, 黄文彬, 刘永刚, 鲁兴涵, 宣丽 2011 60 086103]
[5] Chen K, Cheng J Q, Xiao Y, Tang D G, Huang M J 2009 Acta Phys. Sin. 58 1007 (in Chinese) [陈珂, 程建群, 肖勇, 唐道广, 黄明举 2009 58 1007]
[6] Zhang Z G, Li W c, Liu Y G, Xuan L 2008 Acta Phys. Sin. 57 7344 (in Chinese) [郑致刚, 李文翠, 刘永刚, 宣丽 2008 57 7344]
[7] Zheng Z G, Ma J, Song J, Liu Y G, Hu L F, Xuan L 2007 Acta Phys. Sin. 56 15 (in Chinese) [郑致刚, 马骥, 宋静, 刘永刚, 胡立发, 宣丽 2007 56 15]
[8] Zhang B, Liu Y J, Xu K S 2004 Acta Phys. Sin. 53 1850 (in Chinese) [张斌, 刘言军, 徐克璹 2004 53 1850]
[9] Ding J D, Yang Y L 1992 Jpn. J. Appl. Phys. 2837
[10] West J L, Zhang Z, Zhang M, Byktanir E, Glushchenko A 2005 SPIE 5936 59360L-1
[11] Amimori I, Priezjev N V, Pelcovits R A, Crawford G P 2003 J. Appl. Phys. 93 3248
[12] Ermold M L, Rai K, Fontecchio A K 2005 J. Appl. Phys. 97 104905
[13] Zhang G Q 2006 Ph. D. Dissertation (USA: Kent University)
[14] Fan Z X, Zhang Z D, Xie Y J 2009 China Patent CN101430449 [范志新, 张志东, 解一军 2009 中国专利 CN101430449]
[15] Fan Z X, Xie Y J, Liu Y, Zhang Z D 2012 China Patent CN102799015A [范志新, 解一军, 刘洋, 张志东 2012 中国专利 CN102799015A]
[16] Fan Z X, Xie Y J, Wei X D, Xie H J, Song X H, Wang D, Sun Y B 2011 Acta Opt. Sin. 31 0131005 (in Chinese) [范志新, 解一军, 魏向东, 解会杰, 宋新华, 王丹, 孙玉宝 2011 光学学报 31 0131005]
[17] Li Z Y, Fan Z X, Li J W, Zhao Y F, Sun Y B 2011 Acta Opt. Sin. 31 0816001 (in Chinese) [黎振远, 范志新, 李金炜, 赵永芳, 孙玉宝 2011 光学学报 31 0816001]
[18] Wang X J 2006 The Optics of Liquid Crystal and the Liquid Crystal Displays (Beijing, Science Press) p168 (in Chinese) [王新久 2006 液晶光学和液晶显示 (北京, 科学出版社) 第168页]
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