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Journal of Optical Technology

Journal of Optical Technology


  • Vol. 74, Iss. 10 — Oct. 1, 2007
  • pp: 720–722

Phase modulation of light in a two-frequency nematic liquid crystal

E. A. Konshina and D. S. Kostomarov  »View Author Affiliations

Journal of Optical Technology, Vol. 74, Issue 10, pp. 720-722 (2007)

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This paper presents original studies of the phase modulation of light by nematic liquid crystals (NLCs) with a sign change of the dielectric anisotropy (Δε) as a function of the frequency of the supplied sinusoidal voltage. The voltage dependences of the phase lag are obtained for a number of frequencies. The threshold voltage of the S effect is experimentally determined, and its frequency dependences are found to have a characteristic maximum that corresponds to the critical frequency at which the sign of Δepsi of the NLC mixture changes. It is shown that, in the frequency interval 100-5000 Hz where Δε>0, the phase lag and the threshold voltage are independent of the frequency of the supplied voltage, but they are affected by the conditions of the anisotropic-elastic interphase interaction associated with the orienting surface.

© 2007 Optical Society of America

E. A. Konshina and D. S. Kostomarov, "Phase modulation of light in a two-frequency nematic liquid crystal," J. Opt. Technol. 74, 720-722 (2007)

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  1. S. A. Jewell and J. R. Sambles, "Optical characterization of a dual-frequency hybrid aligned nematic liquid crystal cell," Optics Express 13, 2627 (2005).
  2. A. K. Kirby and G. D. Love, "Fast, large and controllable phase modulation using dual frequency liquid crystals," Optics Express 12, 1470 (2004).
  3. S. R. Restaino, D. Dayton, S. Browne, J. Gonglewski, J. Baker, S. Rogers, S. McDermott, J. Gallegos, and M. Shilko, "On the use of dual frequency nematic material for adaptive optics systems: first results of a closed loop experiment," Optics Express 6, 2 (2000).
  4. S. P. Kotova, M. Yu. Kvashnin, M. A. Rakhmatulin, O. A. Zayakin, I. R. Guralnik, N. A. Klimov, P. Clark, G. D. Love, A. F. Naumov, C. D. Saunter, M. Yu. Loktev, G. V. Vdovin, and L. V. Toporkova, "Modal liquid crystal wavefront corrector," Optics Express 10, 1258 (2002).
  5. Y.-H. Wu, X. Liang, Y.-Q. Lu, F. Du, Y.-H. Lin, and S.-T. Wu, "Variable optical attenuator with a polymer-stabilized dual-frequency liquid crystal," Appl. Opt. 44, 4394 (2005). [CrossRef]
  6. Q. Wang and S. He, "Analysis and design of variable optical attenuators based on nematic liquid-crystal cells," J. Mod. Opt. 53, 481 (2006). [CrossRef]
  7. S. J. Hwang, S.-T. Lin, and C.-H. Lai, "A novel method to measure the cell gap and pretilt angle of a reflective liquid-crystal display," Opt. Commun. 260, 614 (2006). [CrossRef]
  8. E. A. Konshina, M. A. Fedorov, and L. P. Amosova, "Determining the director tilt and phase lag of liquid-crystal cells by optical methods," Opt. Zh. 73, No. 12, 9 (2006) E. A. Konshina, M. A. Fedorov, and L. P. Amosova[J. Opt. Technol. 73, 830 (2006)].
  9. E. A. Konshina, M. A. Fedorov, L. P. Amosova, and Yu. M. Voronin, "The effect of the surface on the phase modulation of light in a layer of a nematic liquid crystal," Zh. Tekh. Fiz. to be pub. (2008).

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