Abstract

We have designed, synthesized, and evaluated the physical properties of some high birefringence (Δn) isothiocyanato phenyltolane and quaterphenyl liquid crystals. These compounds exhibit Δn ~ 0.48-0.52 at room temperature and wavelength λ = 633 nm. Laterally substituted short alkyl chains and fluorine atom eliminate smectic phase and lower the melting temperature. The moderate melting temperature and very high clearing temperature make those compounds attractive for eutectic mixture formulation. These compounds can be used as dopants for color-sequential liquid crystal displays or eutectic mixtures for laser beam steering.

© 2006 IEEE

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  1. S. T. Wu, D. K. Yang, Reflective Liquid Crystal Displays (Wiley, 2001).
  2. P. F. McManamon, T. A. Dorschner, D. L. Corkum, L. Friedman, D. S. Hobbs, M. Holz, S. Liberman, H. Q. Nguyen, D. P. Resler, R. C. Sharp, E. A. Watson, "Optical phased array technology," Proc. IEEE 84, 268-298 (1996).
  3. H. Ren, S. T. Wu, "Tunable electronic lens using polymer network liquid crystals," Appl. Phys. Lett. 82, 22-24 (2003).
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  8. A. Spadlo, R. Dabrowski, M. Filipowicz, Z. Stolarz, J. Przedmojski, S. Gauza, Y. H. Fan, S. T. Wu, "Synthesis, mesomorphic and optical properties of isothiocyanatotolanes," Liq. Cryst. 30, 191-198 (2003).
  9. P. T. Lin, S. T. Wu, C. Y. Chang, C. S. Hsu, "UV stability of high birefringence liquid crystals," Mol. Cryst. Liq. Cryst. 411, 243-253 (2004).
  10. I. C. Khoo, S. T. Wu, Optics and Nonlinear Optics of Liquid Crystals (World Scientific, 1993).
  11. S. Gauza, H. Wang, C. H. Wen, S. T. Wu, A. J. Seed, R. Dabrowski, "High birefringence isothiocyanato tolane liquid crystals," Jpn. J. Appl. Phys. 42, 13463-3466 (2003).

Appl. Phys. Lett. (1)

H. Ren, S. T. Wu, "Tunable electronic lens using polymer network liquid crystals," Appl. Phys. Lett. 82, 22-24 (2003).

J. Phys. D. (1)

C. H. Gooch, H. A. Tarry, "The optical properties of twisted nematic liquid crystal structures with twisted angles $\leq$90," J. Phys. D. 8, 1575-1584 (1975).

Jpn. J. Appl. Phys. (1)

S. Gauza, H. Wang, C. H. Wen, S. T. Wu, A. J. Seed, R. Dabrowski, "High birefringence isothiocyanato tolane liquid crystals," Jpn. J. Appl. Phys. 42, 13463-3466 (2003).

Liq. Cryst. (1)

A. Spadlo, R. Dabrowski, M. Filipowicz, Z. Stolarz, J. Przedmojski, S. Gauza, Y. H. Fan, S. T. Wu, "Synthesis, mesomorphic and optical properties of isothiocyanatotolanes," Liq. Cryst. 30, 191-198 (2003).

Mol. Cryst. Liq. Cryst. (1)

P. T. Lin, S. T. Wu, C. Y. Chang, C. S. Hsu, "UV stability of high birefringence liquid crystals," Mol. Cryst. Liq. Cryst. 411, 243-253 (2004).

Proc. IEEE (1)

P. F. McManamon, T. A. Dorschner, D. L. Corkum, L. Friedman, D. S. Hobbs, M. Holz, S. Liberman, H. Q. Nguyen, D. P. Resler, R. C. Sharp, E. A. Watson, "Optical phased array technology," Proc. IEEE 84, 268-298 (1996).

Proc. SPIE (1)

J. Harriman, S. Gauza, S. T. Wu, D. Wick, B. Bagwell, T. Martinez, D. Payne, S. Serati, "Improving spatial light modulator performance through phase compensation," Proc. SPIE 5553, 58-67 (2004).

Other (4)

S. T. Wu, D. K. Yang, Reflective Liquid Crystal Displays (Wiley, 2001).

K. Nishiyama, M. Okita, S. Kawaguchi, K. Teranishi, R. Takamatsu, "32 $^{\prime\prime}$ WXGA LCD TV using OCB mode, low temperature p-Si TFT and blinking backlight technology," SID Dig. Tech. Papers (2005) pp. 132-135.

H. S. Hsieh, C. H. Chou, W. Y. Li, "Vivid color and clear motion picture 32-inch TFT-LCD TV with scan RGB LED backlight," Proc. IDMC. (2005) pp. 622-624.

I. C. Khoo, S. T. Wu, Optics and Nonlinear Optics of Liquid Crystals (World Scientific, 1993).

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