Abstract

Continuous wave photorefractive-like all-optical switching was demonstrated using a twisted nematic liquid crystal cell composed of the liquid crystal 5CB (4-pentyl-4�??-cyanobiphenyl) with polyvinyl alcohol (PVA) aligning layers. The nonlinear optical effect involved is due to optical control of surface charge on the polyvinyl alcohol alignment layer. The cell exhibits strong optical control of the Friedericksz transition by an argon ion laser. A mechanism is proposed involving the modulation of the charge double layer by photoinduced charge. Optical limiting in the milliwatt range was observed.

© 2005 Optical Society of America

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Adv. Mater. (1)

P.J. Brewer, P.A. Lane, A.J. deMello, D.D.C. Bradley DDC, and J.C. deMello, �??Internal field screening in polymer light-emitting diodes,�?? Adv. Mater. 14, 562-570 (2004), and references therein.

Appl. Phys. Lett. (1)

P. Pagliusi, and G. Cipparone. �??Surface-induced photorefractive-like effect in pure liquid crystals,�?? Appl. Phys. Lett. 80, 168-170 (2002).
[CrossRef]

Eur. Phys. J. B (1)

G. Barbero, L.R. Evangelista, and N.V. Madhusudana. �??Effect of surface electric field on the anchoringof nematic liquid crystals,�?? Eur. Phys. J. B 1, 327-331 (1998).
[CrossRef]

IEEE J. Quant. Elec. (1)

I.C. Khoo. �??Orientation photorefractive effects in nematic liquid crystal films,�?? IEEE J. Quant. Elec. 32, 525-534 (1996).

J. Appl. Phys. (4)

M. Kaczmaerk, A Dyadusha, S. Slussarenko, and I. C. Khoo. �??The role of surface charge field in two-beam coupling in liquid crystal cells with photoconducting polymer layers,�?? J. Appl. Phys. 96, 2616-2623 (2004).
[CrossRef]

Oksana Ostroverkhova and Kenneth D. Singer, �??Space-charge dynamics in photorefractive polymers,�?? J. Appl. Phys. 92, 1727-1743 (2002).
[CrossRef]

Valeriy Boichuk, Sergey Kucheev, Janusz Parka, Victor Reshetnyak, Yuriy Reznikov, Irina Shiyanovkaya, Kenneth D. Singer, and Sergy Slussarenko. �??Surface-mediated light controlled Friederickz transition in a nematic liquid crystal cell,�?? J. Appl. Phys. 90, 5963-5967 (2001).
[CrossRef]

P. Pagliusi, and G. Cipparone. �??Charge transport due to photoelectric surface activation in pure nematic liquid crystal cells,�?? J. Appl. Phys. 92, 4863-4869 (2002).
[CrossRef]

J. Opt. Soc. Am. B (1)

Opt. Lett. (1)

Opto-Electron. Rev. (1)

T. Grudniewski, J. Parka, R. Dabrowski, A. Januszko, and A. Miniewicz. �??Investigation of the diffraction efficiency in dye-doped LC cells under low frequency AC voltage,�?? Opto-Electron. Rev. 10, 11-15 (2002).

Phys. Rev. E (1)

G. Barbero, A.K. Zvezdin, L.R. Evangelista. �??Ionic adsorption and equilibrium distribution of charges in a nematic cell,�?? Phys. Rev. E 59, 1846-1849 (1999).
[CrossRef]

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