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Optics Letters

Optics Letters


  • Vol. 21, Iss. 20 — Oct. 15, 1996
  • pp: 1655–1657

Photorefractive effects observed in 4-N, N-dimethylamino-4′-N′-methyl-stilbazolium toluene-p-sulfonate

S. Follonier, Ch. Bosshard, F. Pan, and P. Günter  »View Author Affiliations

Optics Letters, Vol. 21, Issue 20, pp. 1655-1657 (1996)

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We measured, for the first time to our knowledge, a net two-beam coupling gain in an organic crystal. Our photorefractive measurements were carried out in nominally pure organic crystals of 4-N, N-dimethylamino-4′-N′-methyl-stilbazolium toluene-p-sulfonate (DAST). Because of its large electro-optic coefficient, r11 = 83 pm/V at λ = 750 nm, and a photoconductivity of up to σ = 6.7 × 10−12 Ω−1 cm−1 at intensity I = 570 mW/cm2, DAST showed a gain of 2.2 cm−1 for an absorption of α = 1.8 cm−1. With grating buildup times below 1 s at light intensities of 300 mW/cm2, DAST is a promising candidate for photorefractive applications in the near infrared.

© 1996 Optical Society of America

Original Manuscript: June 14, 1996
Published: October 15, 1996

S. Follonier, Ch. Bosshard, F. Pan, and P. Günter, "Photorefractive effects observed in 4-N, N-dimethylamino-4′-N′-methyl-stilbazolium toluene-p-sulfonate," Opt. Lett. 21, 1655-1657 (1996)

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