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Proceedings Article

30 to 50 ns liquid-crystal optical switches

[+] Author Affiliations
M. W. Geis, R. J. Molnar, G. W. Turner, T. M. Lyszczarz

MIT Lincoln Lab, (USA)

R. M. Osgood, B. R. Kimball

Natick Lab. Army Research, Development, and Engineering Ctr. (USA)

Proc. SPIE 7618, Emerging Liquid Crystal Technologies V, 76180J (February 12, 2010); doi:10.1117/12.840281
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From Conference Volume 7618

  • Emerging Liquid Crystal Technologies V
  • Liang-Chy Chien
  • San Francisco, California | January 23, 2010

abstract

The optical switching times of liquid-crystal cells using 5CB, 5OCB and PCH5 liquid crystal materials have been characterized as a function of applied voltage, V, and temperature, T. The transition time from 90 to 10 % transmission scales as V-2 and is limited to 50 to 30 ns by the breakdown electric field, ~ 106 V cm-1 of the liquid crystal. The time from the initial voltage step to 90 % transmission, delay time, decreases with increasing voltage and approaches a constant value at higher electric fields, >105 V cm-1. Both the transition and delay times decrease with increasing temperature. The minimum transition times at temperatures a few degrees below the nematic-isotropic temperature are 32, 32, and 44 ns and delay times are 44, 25 and 8 ns for 5CB, 5OCB, and PCH5 respectively.

© (2010) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

M. W. Geis ; R. J. Molnar ; G. W. Turner ; T. M. Lyszczarz ; R. M. Osgood, et al.
"30 to 50 ns liquid-crystal optical switches", Proc. SPIE 7618, Emerging Liquid Crystal Technologies V, 76180J (February 12, 2010); doi:10.1117/12.840281; http://dx.doi.org/10.1117/12.840281


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