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Tytuł artykułu

Photo-alignment of liquid crystals in micro capillaries with point-by-point irradiation

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Języki publikacji
EN
Abstrakty
EN
A photo-alignment method for micro capillaries based on the SD-1 azo-dye is demonstrated. In this work a liquid-crystal molecules aligning layer is created by point-by-point irradiation of the azo-dye film by using an UV laser light. The method opens up new possibilities for an improved molecules’ orientation control in both glass- and polymer-based photonic liquid crystal fibres.
Twórcy
  • Faculty of Physics, Warsaw University of Technology, 75 Koszykowa Str., 00-662 Warszawa, Poland
autor
  • Faculty of Physics, Warsaw University of Technology, 75 Koszykowa Str., 00-662 Warszawa, Poland
autor
  • Faculty of Physics, Warsaw University of Technology, 75 Koszykowa Str., 00-662 Warszawa, Poland
  • Faculty of Physics, Warsaw University of Technology, 75 Koszykowa Str., 00-662 Warszawa, Poland
  • Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong
Bibliografia
  • 1. P.S.J. Russell, “Photonic-crystal fibres”, J. Lightwave Technol. 24, 4729-4749 (2006).
  • 2. T.R. Woliński, K. Szaniawska, K. Bondarczuk, P. Lesiak, A.W. Domański, R. Dąbrowski, E. Nowinowski-Kruszelnicki, and J. Wójcik, “Propagation properties of photonic crystal fibres filled with nematic liquid crystals”, Opto-Electron. Rev. 13, 177-182 (2005).
  • 3. T. Alkeskjold, J. Lagsgaard, A. Bjarklev, D. Hermann, A. Anawati, J. Broeng, J. Li, and S. Wu. “All-optical modulation in dye-doped nematic liquid crystal photonic fibre band-gap”, Opt. Express 12, 5857-5871 (2004).
  • 4. A. Lorenz, R. Schuhmann, and H.S. Kitzerow, “Switchable waveguiding in two liquid-crystal-filled photonic crystal fibres”, Appl. Opt. 49, 3846-3853 (2010).
  • 5. J. Cognard, “Alignment of nematic liquid-crystals and their mixtures”, Mol. Cryst. Liq. Cryst. Suppl. 1, 1-74 (1982).
  • 6. D. Zielke and J. Fruhauf, “Determination of rates for orientation-dependent etching”, Sensor Actuator A48, 151-156 (1995).
  • 7. B.J. Choi, S.V. Sreenivasan, S. Johnson, M. Colburn, and C.G. Wilson, “Design of orientation stages for step and flash imprint lithography”, Precis. Eng. 25, 192-199 (2001).
  • 8. K. Honjo and A. Shindo, “Crystallinity of SiC coated on carbon fibre”, J. Ceramic Society of Japan 94, 172-178 (1986).
  • 9. M. Chychłowski, S. Ertman, E. Nowinowski-Kruszelnicki, and T.R. Woliński, “Escaped radial and planar liquid crystal orientation inside of capillaries”, Mol. Cryst. Liq. Cryst. 553, 127-132 (2012).
  • 10. K. Vaughn, M. Sousa, D. Kang, and C. Rosenblatt, “Continuous control of liquid crystal pretilt angle from homeotropic to planar”, Appl. Phys. Lett. 90, 194102 (2007).
  • 11. M. Chychłowski, E. Nowinowski-Kruszelnicki, and T.R. Woliński, “Liquid crystal orientation control in photonic liquid crystal fibres”, Proc. SPIE 7753, 41-45 (2011).
  • 12. M. Chychłowski and T.R. Woliński, “Splay orientation in a capillary”, Phot. Lett. of Poland 2, 180-182 (2010).
  • 13. V.G. Chigrinov, V.M. Kozenkov, and H.S. Kwok, Photo-alignment of Liquid Crystal Materials: Physics and Applications, Wiley-SID series, 2008.
  • 14. V.G. Chigrinov, “Photoalignment and photopattering in liquid crystal photonics”, Proc. SPIE 8279, 11-20 (2012).
  • 15. M. Chychłowski, O. Yaroshchuk, R. Kravchuk, and T.R. Woliński, “Liquid crystal alignment in cylindrical microcapillaries”, Opto-Electron. Rev. 20, 47-52 (2012).
  • 16. M. Chychłowski, S. Ertman, E. Nowinowski-Kruszelnicki, R. Dąbrowski, and T.R. Woliński, “Comparision of different liquid crystal materials under planar and homeotropic boundary conditions in capillaries”, Acta Physica Polonica A120, 582-584 (2011).
  • 17. M. Schadt, K. Schmitt, V. Kozinkov, and V. Chigrinov, “Surface-induced parallel alignment of liquid crystals by linearly polymerized photopolymers”, Jpn. J. Appl. Phys. 31, 2155-2164 (1992).
  • 18. V.G. Chigrinov, H.S. Kwok, H. Hasebe, H. Takatsu, and H. Takada, “Liquid-crystal photoaligning by azo dyes”, SID 16, 897-904 (2008).
  • 19. S. Ertman, A.K. Srivastava, V.G. Chigrinov, M. Chychłowski, and T.R. Woliński, “Patterned alignment of liquid crystal molecules in silica micro-capillaries”, Liq. Cryst. 40, 1-6 (2013).
  • 20. O. Yaroshchuk and Y. Reznikov, “Photoalignment of liquid crystals: basic and current trends”, J. Mater. Chem. 22, 286-300 (2012).
  • 21. V.G. Chigrinov, “Photoalignment and photopattering - A new challenge in liquid crystal photonics”, Crystals 3, 149-162 (2013).
Typ dokumentu
Bibliografia
Identyfikator YADDA
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