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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 18, Iss. 10 — Oct. 1, 2001
  • pp: 1456–1463

Nonlinear optical refractive indices and absorption coefficients of α,β-unsaturated ketone derivatives

Jun Zhou, Edwin Y. B. Pun, and Xiao Hong Zhang  »View Author Affiliations


JOSA B, Vol. 18, Issue 10, pp. 1456-1463 (2001)
http://dx.doi.org/10.1364/JOSAB.18.001456


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Abstract

The nonlinear optical refractive indices and the nonlinear optical absorption coefficients of newly synthesized α,β-unsaturated ketone derivatives (USKDs) were investigated by use of the intensity-dependent transmittance method and the Z-scan technique with a pulsed Nd:YAG laser at 532-nm and 1064-nm wavelengths. Opposite changes of signs of the nonlinear refractive indices are observed at the two wavelengths and can be mainly attributed to the thermal effect and the two-photon absorption mechanism. The origins of the nonlinearity of USKDs are discussed, and by establishing a kinetic model for the USKDs, several other nonlinear optical parameters are obtained, such as the cross section of two-photon absorption, the absorption cross section of the excited state, and the real part of second-order hyperpolarizability of the ground state. The results indicate that USKDs are potential optical limiting materials.

© 2001 Optical Society of America

OCIS Codes
(160.4330) Materials : Nonlinear optical materials
(160.4890) Materials : Organic materials
(190.0190) Nonlinear optics : Nonlinear optics
(190.4180) Nonlinear optics : Multiphoton processes

Citation
Jun Zhou, Edwin Y. B. Pun, and Xiao Hong Zhang, "Nonlinear optical refractive indices and absorption coefficients of α, β-unsaturated ketone derivatives," J. Opt. Soc. Am. B 18, 1456-1463 (2001)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-18-10-1456

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