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Optics Letters

Optics Letters


  • Vol. 18, Iss. 13 — Jul. 1, 1993
  • pp: 1044–1046

Net two-beam-coupling gain in a polymeric photorefractive material

M. C. J. M. Donckers, S. M. Silence, C. A. Walsh, F. Hache, D. M. Burland, W. E. Moerner, and R. J. Twieg  »View Author Affiliations

Optics Letters, Vol. 18, Issue 13, pp. 1044-1046 (1993)

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Two-beam-coupling gain coefficients exceeding the absorption coefficient are demonstrated for the first time to our knowledge in an organic photorefractive system. The material is based on the photoconducting polymer poly(N-vinylcarbazole), doped with the optically nonlinear chromophore 3-fluoro-4-N,N-diethylamino-β-nitrostyrene and sensitized for charge generation with 2,4,7-trinitro-9-fluorenone. The photorefractive performance is significantly better than that of any previously described organic. Diffraction efficiencies as large as 1% in a 125-μm sample, grating growth times of the order of 100 ms, and beam-coupling gain coefficients >10 cm−1 were observed at 647 nm (writing intensity of 1 W cm−2, applied field of 40 V μm−1).

© 1993 Optical Society of America

Original Manuscript: January 21, 1993
Published: July 1, 1993

M. C. J. M. Donckers, S. M. Silence, C. A. Walsh, F. Hache, D. M. Burland, W. E. Moerner, and R. J. Twieg, "Net two-beam-coupling gain in a polymeric photorefractive material," Opt. Lett. 18, 1044-1046 (1993)

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