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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 1 — Jan. 4, 2010
  • pp: 31–36

Observation of hysteresis effects in POLICRYPS holographic gratings

Luciano De Sio, Antonio De Luca, Giovanni Liveri, and Cesare Umeton  »View Author Affiliations

Optics Express, Vol. 18, Issue 1, pp. 31-36 (2010)

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We report on the observation of hysteresis effects that take place in the electro-optical response of a polymer-liquid-crystal-polymer slice grating named POLICRYPS. Investigation of transmittance as a function of an applied external voltage reveals an hysteresis area that is strongly correlated to the delay between consecutive applications of square wave voltages of different amplitude. A suitable software has been implemented to control this delay: when it is long, results show a large hysteresis area, which can be reduced by diminishing the delay. In addition, correlation between this area and the frequency of the applied voltage is analyzed, taking into account that the effect of impurity ions migration is not negligible in the case of low frequencies.

© 2010 Optical Society of America

OCIS Codes
(050.1590) Diffraction and gratings : Chirping
(230.3720) Optical devices : Liquid-crystal devices

ToC Category:
Diffraction and Gratings

Original Manuscript: November 4, 2009
Revised Manuscript: December 16, 2009
Manuscript Accepted: December 16, 2009
Published: December 22, 2009

Luciano De Sio, Antonio De Luca, Giovanni Liveri, and Cesare Umeton, "Observation of hysteresis effects in POLICRYPS holographic gratings," Opt. Express 18, 31-36 (2010)

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