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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 12 — Jun. 4, 2012
  • pp: 13326–13336

Small-polaron based holograms in LiNbO3 in the visible spectrum

H. Brüning, V. Dieckmann, B. Schoke, K.-M. Voit, M. Imlau, G. Corradi, and C. Merschjann  »View Author Affiliations

Optics Express, Vol. 20, Issue 12, pp. 13326-13336 (2012)

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Diffraction efficiency, relaxation behavior and dependence on pump-beam intensity of small-polaron based holograms are studied in thermally reduced, nominally undoped lithium niobate in the visible spectrum (λ = 488 nm). The pronounced phase gratings with diffraction efficiency up to η = (10.8 ± 1.0)% appeared upon irradiation by single ns-laser pulses (λ = 532 nm) and are comprehensively assigned to the optical formation of spatially modulated densities of small bound Nb Li 4 + electron polarons, Nb Li 4 + : Nb Nb 4 + electron bipolarons, and O hole polarons. A remarkable quadratic dependence on the pump-beam intensity is discovered for the recording configuration K || c-axis and can be explained by the electro-optic contribution of the optically generated small bound polarons. We discuss the build-up of local space-charge fields via small-polaron based bulk photovoltaic currents.

© 2012 OSA

OCIS Codes
(090.7330) Holography : Volume gratings
(160.3730) Materials : Lithium niobate
(160.4670) Materials : Optical materials
(160.4760) Materials : Optical properties
(190.4400) Nonlinear optics : Nonlinear optics, materials
(160.5335) Materials : Photosensitive materials

ToC Category:

Original Manuscript: April 27, 2012
Revised Manuscript: May 23, 2012
Manuscript Accepted: May 23, 2012
Published: May 29, 2012

H. Brüning, V. Dieckmann, B. Schoke, K.-M. Voit, M. Imlau, G. Corradi, and C. Merschjann, "Small-polaron based holograms in LiNbO3 in the visible spectrum," Opt. Express 20, 13326-13336 (2012)

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