Ukrainian Journal of Physical Optics

Number 2, Volume 2, June 2001

Optical conoscopy of distorted uniaxial liquid crystals: computer simulation and experiment

Yu.A.Nastishin, O.B.Dovgyi, O.G.Vlokh

We propose an algorithm to compute the conoscopic pattern for distorted uniaxial liquid crystal cells. The computed conoscopic figures for several cells (homeotropic, planar, twist, hybrid, hybrid under an external field) are compared to the corresponding experimental conoscopic patterns. We demonstrate that conoscopy can be used for the characterization of the distorted nematic cells with the director deformations which can not be detected and unambigously characterized by direct microscopy observations and other techniques

Key words: optical conoscopy, uniaxial single crystals, distorted liquid crystal, birefringence, computer simulation

doi 10.3116/16091833/2/2/98/2001

1. Born M and Wolf E, 1970. Principles of Optics. Pergamon Press, 4th ed.
2. Konstantinova AF, Grechushnikov BN, Bokut BV, Valyashko EG, 1995. Optical properties of crystals. Minsk. "Navuka i Technika".
3. Vlokh OG, 1984. Phenomena of space dispersion in parametric crystalloptics. Lviv. "Vyshcha shkola".
4. Romanyuk MO, 1997. Crystalloptics. Kiev. IZMN.
5. Yu LJ and Saupe A, 1980. Phys. Rev. Lett. 45: 1000.
        doi:10.1103/PhysRevLett.45.1000 http://dx.doi.org/10.1103/PhysRevLett.45.1000
6. Chandrasekhar S, Nair Geetha G, Shankar Rao DS, Krishna Prasad S, Praefcke K, Blunk D, 1998. Curr.Sci. 75: 1042-1046.
7. Galerne Y and Marcerou JP, 1983. Phys. Rev. Lett. 51: 2109.
        doi:10.1103/PhysRevLett.51.2109 http://dx.doi.org/10.1103/PhysRevLett.51.2109
8. Gorechka E, Chandani ADL, Ouchi Yu, Takezoe H, Fukuda A, 1990. Jpn. J. Appl.Phys., 29: 131.
        doi:10.1143/JJAP.29.131 http://dx.doi.org/10.1143/JJAP.29.131
9. Moritake H, Ozaki M, Tanigushi H, Satoh K, Yoshino K, 1994. Jpn. J. Appl.Phys. 33: 5503.
        doi:10.1143/JJAP.33.5503 http://dx.doi.org/10.1143/JJAP.33.5503
10. Fujikava T, Hiraoka K, Isoaki T, Kajikava K, Takezoe H, Fukuda A, 1993. Jpn. J. Appl.Phys. 32: 985.
        doi:10.1143/JJAP.32.985 http://dx.doi.org/10.1143/JJAP.32.985
11. Natano J, Nanaki Y, Furue H, Uehara H, Saito Sh, Murashiro K, 1994. Jpn. J. Appl.Phys. 5498.
12. Prost J and Gasparoux HCR, 1972. Acad. Sci. Paris C273: 335.
13. Maughin, 1911. Bull C. Soc. fr. Miner. 34: 71.
14. Cladis PE, 1973. Phys. Rev. Lett. 31:1200.
        doi:10.1103/PhysRevLett.31.1200 http://dx.doi.org/10.1103/PhysRevLett.31.1200
15. MacGregor AR, 1999. J. Opt. Soc. Am. A 7: 337.
16. Baur G, Wittwer V and Berreman DW, 1972. Phys. Lett. A 56: 142.
        doi:10.1016/0375-9601(76)90175-4 http://dx.doi.org/10.1016/0375-9601(76)90175-4
17. Andrienko D, Kurioz Y, Reznikov Y, Rozenblatt C, Petchek R, Lavrentovich O and Subacius D, 1998. J.Appl.Phys. 83: 50.
        doi:10.1063/1.366700 http://dx.doi.org/10.1063/1.366700
18. Ziherl P, Subacius D, Strigazzi A, Pergamenshchik VM, Alexe-Ionesku AL, Lavrentovich OD and Zumer S, 1998. Liq. Cryst. 24: 607.
        doi:10.1080/026782998207082 http://dx.doi.org/10.1080/026782998207082
19. Sheffer TJ and Nehring J, 1977. J.Appl. Phys. 48: 1873.

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