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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 4 — Feb. 13, 2012
  • pp: 3499–3508

Photoinduced helical inversion in cholesteric liquid crystal cells with homeotropic anchoring

Igor Gvozdovskyy, Oleg Yaroshchuk, Marina Serbina, and Rumiko Yamaguchi  »View Author Affiliations

Optics Express, Vol. 20, Issue 4, pp. 3499-3508 (2012)

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Structural changes caused by the optically induced helical inversion in the cholesteric liquid crystal cells with homeotropic anchoring are studied. In a one-step exposure, a sequence of structural transformations “lying left-handed helix – unwound homeotropic state – lying right-handed helix” is realized. In this process, smooth expansion of a left-handed helix, transition to an unwound state, emergence and smooth compression of a right-handed helix was observed. The unwound state was maintained over a rather wide range of exposures. Well-oriented and highly periodic fingerprint textures capable of the above mentioned structural changes were obtained by rubbing the aligning substrates. This allowed for obtaining photo-tunable diffraction gratings and using them to demonstrate new beam steering principle. Also, pitch reversal suggested new options for optical recording, in particular contrast reversal and edge enhancement.

© 2012 OSA

OCIS Codes
(210.4810) Optical data storage : Optical storage-recording materials
(230.1950) Optical devices : Diffraction gratings
(230.3720) Optical devices : Liquid-crystal devices

ToC Category:
Optical Devices

Original Manuscript: November 23, 2011
Revised Manuscript: December 26, 2011
Manuscript Accepted: December 29, 2011
Published: January 30, 2012

Igor Gvozdovskyy, Oleg Yaroshchuk, Marina Serbina, and Rumiko Yamaguchi, "Photoinduced helical inversion in cholesteric liquid crystal cells with homeotropic anchoring," Opt. Express 20, 3499-3508 (2012)

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  1. P. G. de Gennes and J. Prost, The Physics of Liquid Crystals (Oxford University Press, 1993).
  2. P. Oswald and P. Pieranski, Nematic and Cholesteric Liquid Crystals: Concept and Physical Properties Illustrated by Experiments (CRC Press, 2005).
  3. D. Demus and L. Ritcher, Textures of Liquid Crystals (Wiley VCH, 1980).
  4. T. K. Gaylord and M. G. Moharam, “Thin and thick gratings: terminology clarification,” Appl. Opt.20(19), 3271–3273 (1981). [CrossRef] [PubMed]
  5. D.-K. Yang, J. W. Doane, Z. Yaniv, and J. Glasser, “Cholesteric reflective display: drive scheme and contrast,” Appl. Phys. Lett.64(15), 1905–1907 (1994). [CrossRef]
  6. B. Taheri, J. W. Doane, D. Davis, and D. St. John, “Optical properties of bistable cholesteric reflective displays,” SID Int. Symp. Digest Tech. Papers 27, 39–42 (1996).
  7. Z. Li, P. Desai, R. B. Akins, G. Ventouris, and D. Voloschenko, “Electrically tunable color for full-color refractive displays,” in Liquid Crystal Materials, Devices, and Applications VIII, L.-C. Chien, ed., Proc. SPIE 4658, 7–13 (2002).
  8. D. J. Broer, J. Lub, and G. N. Mol, “Wide-band reflective polarizers from cholesteric polymer networks with a pitch gradient,” Nature378(6556), 467–469 (1995). [CrossRef]
  9. L. Li, J. Li, B. Fan, Y. Jiang, and S. M. Faris, “Reflective cholesteric liquid crystal polarizers and their applications,” Proc. SPIE-Int. Soc. Opt. Eng. 3560, 33–40 (1998).
  10. Y.-C. Hsiao, C.-Y. Tang, and W. Lee, “Fast-switching bistable cholesteric intensity modulator,” Opt. Express19(10), 9744–9749 (2011). [CrossRef] [PubMed]
  11. I. P. Ilchishin, E. A. Tikhonov, V. G. Tishchenko, and M. T. Shpak, “Generation of a tunable radiation by impurity cholesteric liquid crystals,” JETP Lett.32, 27–30 (1980).
  12. C. Denekamp and B. L. Feringa, “Optically active diarylethenes for multimode photoswitching between liquid crystalline phases,” Adv. Mater. (Deerfield Beach Fla.)10(14), 1080–1082 (1998). [CrossRef]
  13. S. Kurihara, S. Nomiyama, and T. Nonaka, “Photochemical control of the macrostructure of cholesteric liquid crystals by means of photoisomerization of chiral azobenzene molecules,” Chem. Mater.13(6), 1992–1997 (2001). [CrossRef]
  14. M. Brehm, H. Finkelmann, and H. Stegemeyer, “Orientation of cholesteric mesophases on lecithin-treated surfaces,” Ber. Bunsenges. Phys. Chem78, 883–886 (1974).
  15. D. Subacius, P. J. Bos, and O. D. Lavrentovich, “Switchable diffractive cholesteric gratings,” Appl. Phys. Lett.71(10), 1350–1352 (1997). [CrossRef]
  16. P. Oswald, J. Baudry, and S. Pirkl, “Static and dynamic properties of cholesteric fingers in electric field,” Phys. Rep.337(1-2), 67–96 (2000). [CrossRef]
  17. S. V. Shiyanovskii, D. Voloshchenko, T. Ichikawa, and O. D. Lavrentovich, “Director structures of cholesteric diffraction gratings,” Mol. Cryst. Liq. Cryst. (Phila. Pa.)358(1), 225–236 (2001). [CrossRef]
  18. A. Y.-G. Fuh, Ch.-H. Lin, and Ch.-Y. Huang, “Dynamic pattern formation and beam-steering characteristics of cholesteric gratings,” Jpn. J. Appl. Phys.41(Part 1, No. 1), 211–218 (2002). [CrossRef]
  19. J.-J. Wu, F.-C. Chen, Y.-S. Wu, and S.-H. Chen, “Phase gratings in pretilted homeotropic cholesteric liquid crystal films,” Jpn. J. Appl. Phys.41(Part 1, No. 10), 6108–6109 (2002). [CrossRef]
  20. I. Smalukh, B. Senyuk, P. Palffy-Muhoray, O. D. Lavrentovich, H. Huang, E. Gartland, V. Bodnar, T. Kosa, and B. Taheri, “Electric-field-induced nematic-cholesteric transition and three-dimentional director structures in homeotropic cells,” Phys. Rev. E Stat. Nonlin. Soft Matter Phys.72, 0617071–06170716 (2005).
  21. In addition to this effect, the short-pitch helical structures (p = 0.3–0.6 μm), known as uniform lying helix (ULH), can also be switched due to the flexoelectric effect. In this case, the applied electric field causes fast rotation of cholesteric helix in the cell plane due to the linear coupling between an electric polarization and splay/bend deformations of LC. The ULH texture can be transformed to the fingerprint texture in the electric field at values close to the unwinding voltage. In the present studies we are limited to the long-pitch CLC, which exhibit clear fingerprint textures at a zero field.
  22. P. E. Cladis and M. Kleman, “The cholesteric domain structure,” Mol. Cryst. Liq. Cryst. (Phila. Pa.)16(1-2), 1–20 (1972). [CrossRef]
  23. B. Y. Zeldovich and N. V. Tabiryan, “Equilibrium structure of a cholesteric with homeotropic orientation on the walls,” Sov. Phys. JETP56, 563–566 (1982).
  24. N. Tamaoki, “Cholesteric liquid crystals for color information technology,” Adv. Mater. (Deerfield Beach Fla.)13(15), 1135–1147 (2001). [CrossRef]
  25. P. Witte, M. Brehmer, and J. Lub, “LCD components obtained by patterning of chiral nematic polymer layers,” J. Mater. Chem.9(9), 2087–2094 (1999). [CrossRef]
  26. N. Venkataraman, G. Magyar, M. Lightfoot, E. Montbach, A. Khan, T. Schneider, J. W. Doane, L. Green, and Q. Lee, “Thin flexible photosensitive cholesteric displays,” J. Soc. Inf. Disp.17, 869–873 (2009).
  27. V. Vinogradov, A. Khizhnyak, L. Kutulya, Y. Reznikov, and V. Reshetnyak, “Photoinduced change of cholesteric LC pitch,” Mol. Cryst. Liq. Cryst. (Phila. Pa.)192, 273–278 (1990).
  28. B. L. Feringa, N. P. M. Huck, and A. M. Schoevaars, “Chiroptical molecular switches,” Adv. Mater. (Deerfield Beach Fla.)8(8), 681–684 (1996). [CrossRef]
  29. P. Witte, J. C. Galan, and J. Lub, “Modification of the pitch of chiral nematic liquid crystals by means of photoisomerization of chiral dopants,” Liq. Cryst.24(6), 819–827 (1998). [CrossRef]
  30. T. J. White, R. L. Bricker, L. V. Natarajan, V. P. Tondiglia, L. Green, Q. Li, and T. J. Bunning, “Electrically switchable, photoaddressable cholesteric liquid crystal reflectors,” Opt. Express18(1), 173–178 (2010). [CrossRef] [PubMed]
  31. J. Ma, Ya. Li, T. White, A. Urbas, and Q. Li, “Light-driven nanoscale chiral molecular switch: reversible dynamic full range color phototuning,” Chem. Commun. (Camb.)46(20), 3463–3465 (2010). [CrossRef] [PubMed]
  32. M. Mathews, R. S. Zola, S. Hurley, D. K. Yang, T. J. White, T. J. Bunning, and Q. Li, “Light-driven reversible handedness inversion in self-organized helical superstructures,” J. Am. Chem. Soc.132(51), 18361–18366 (2010). [CrossRef] [PubMed]
  33. M. Mathews, R. Zola, D. Yang, and Q. Li, “Thermally, photochemically and electrically switchable reflection colors from self-organized chiral bend-core liquid crystals,” J. Mater. Chem.21(7), 2098–2103 (2011). [CrossRef]
  34. Yu. Reznikov and T. Sergan, “Orientational transitions in a cell with twisted nematic liquid crystal,” Mol. Cryst. Liq. Cryst. (Phila. Pa.)330(1), 375–381 (1999). [CrossRef]
  35. S. N. Yarmolenko, L. A. Kutulya, V. V. Vaschenko, and L. V. Chepeleva, “Photosensitive chiral dopants with high twisting power,” Liq. Cryst.16(5), 877–882 (1994). [CrossRef]
  36. P. R. Gerber, “On the determination of the cholesteric screw sense by the Grandjean-Cano-method,” Z. Naturforsch. C35a, 619–622 (1980).
  37. S. V. Lagerwall, Ferroelectric and Antiferroelectric Liquid Crystals (Wiley-VCH, 1999).
  38. H. Sato, H. Fujikake, Y. Iino, M. Kawakita, and H. Kikuchi, “Flexible grayscale ferroelectric liquid crystal device containing polymer walls and networks,” Jpn. J. Appl. Phys.41(Part 1, No. 8), 5302–5306 (2002). [CrossRef]

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