5 October 1995 Z-scan measurements on molten acetylene materials in the isotropic liquid state
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Abstract
The nonlinear optical properties of diphenylacetylene and bis(4-biphenyl) acetylene have been investigated using the Z-scan technique. In these experiments the solid materials were heated above their melting points into the isotropic liquid state using a temperature controlled hot stage. Using this method, the nonlinear optical properties of materials with low solubility or where the solvent may have a significant contibution to the observed nonlinearity can be measured. Nonlinear absorption and refraction have been measured to be 1.4 cm/GW at 532 nm which gives a two-photon absorption cross-section (sigma) 2 equals (17 +/- 6) X 10-50 cm4s/photon-molecule. The nonlinear absorption coefficient of molten refraction for both of these materials has also been investigtaed. Molten diphenylacetylene has a nonlinear refractive index n2 equals 3.9 X 10-12 esu. Surprisingly, the bis(4-biphenyl)acetylene appears to have a very small nonlinear refractive index. The optical limiting behavior of molten bis(4-biphenyl) acetylene has also been studied.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Paul A. Fleitz, Richard L. Sutherland, "Z-scan measurements on molten acetylene materials in the isotropic liquid state", Proc. SPIE 2527, Nonlinear Optical Properties of Organic Materials VIII, (5 October 1995); doi: 10.1117/12.222803; https://doi.org/10.1117/12.222803
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