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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Vol. 15, Iss. 7 — Jul. 1, 1998
  • pp: 2185–2190

Direct observation of charge distributions on photorefractive crystals with the force microscope

E. Soergel, W. Krieger, and V. I. Vlad  »View Author Affiliations

JOSA B, Vol. 15, Issue 7, pp. 2185-2190 (1998)

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Images of the charge distribution at the surface of a photorefractive Bi12SiO20 crystal were obtained by electrostatic force detection with an atomic force microscope. The images show charge gratings with periods of 1.6 and 0.23 μm written by two intersecting laser beams at 514 nm. In addition, they reveal a microstructure in the charge distribution that is caused by surface inhomogeneities. Grating profiles obtained at different writing fluences permit the study of saturation processes. The polarity of the charge carriers was determined by measurement of the phase shift between the light grating and the charge grating.

[Optical Society of America ]

OCIS Codes
(090.2900) Holography : Optical storage materials
(120.6650) Instrumentation, measurement, and metrology : Surface measurements, figure
(180.0180) Microscopy : Microscopy
(190.5330) Nonlinear optics : Photorefractive optics
(210.4810) Optical data storage : Optical storage-recording materials

E. Soergel, W. Krieger, and V. I. Vlad, "Direct observation of charge distributions on photorefractive crystals with the force microscope," J. Opt. Soc. Am. B 15, 2185-2190 (1998)

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