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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 18, Iss. 2 — Feb. 1, 2001
  • pp: 182–186

Transient photoinduced current in dye-doped polymer and polymer-dispersed liquid crystals

G. Cipparrone, A. Mazzulla, P. Pagliusi, A. V. Sukhov, and R. F. Ushakov  »View Author Affiliations


JOSA B, Vol. 18, Issue 2, pp. 182-186 (2001)
http://dx.doi.org/10.1364/JOSAB.18.000182


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Abstract

Results are reported on the experimental observation and detailed treatment of photoinduced dc currents, which arise in both dye-doped polymer and dispersion of liquid-crystalline droplets in the same polymer under cw laser-beam illumination. These currents reveal transient behavior, i.e., a relaxation to zero value after an initial increase. This growth is monotonic by low values of the laser radiation intensity, but it changes to oscillating behavior by higher values. A preliminary theoretical approach, which is based on experimentally observed features, reveals good qualitative agreement with current temporal-envelope measurements. The observation of these photoinduced currents is another evidence for the photorefractive nature of the light-induced diffraction gratings, which were observed earlier in the same materials.

© 2001 Optical Society of America

OCIS Codes
(160.2900) Materials : Optical storage materials
(160.3710) Materials : Liquid crystals
(160.5140) Materials : Photoconductive materials
(160.5320) Materials : Photorefractive materials
(160.5470) Materials : Polymers
(260.5150) Physical optics : Photoconductivity

Citation
G. Cipparrone, A. Mazzulla, P. Pagliusi, A. V. Sukhov, and R. F. Ushakov, "Transient photoinduced current in dye-doped polymer and polymer-dispersed liquid crystals," J. Opt. Soc. Am. B 18, 182-186 (2001)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-18-2-182

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