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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: G. I. Stegeman
  • Vol. 23, Iss. 5 — May. 1, 2006
  • pp: 868–873

Photo-orientation by multiphoton photoselection

Hidekazu Ishitobi, Zouheir Sekkat, and Satoshi Kawata  »View Author Affiliations


JOSA B, Vol. 23, Issue 5, pp. 868-873 (2006)
http://dx.doi.org/10.1364/JOSAB.23.000868


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Abstract

We present evidence of photoselection by polarized multiphoton absorption (MPA) in an azo dye, i.e., Disperse Red 1 (DR1), dispersed in films of poly(methyl-methacrylate). MPA of DR1 at a fundamental of 785 nm , from a pulsed, regeneratively amplified, Ti:sapphire laser, results in photobleaching of the dye, and linearly polarized MPA of DR1 creates anisotropy, a feature that is indicative of orientational hole burning by MPA. The slopes of the early-time evolution of the isotropic absorbance and anisotropy show a dependence on the 3.65 ± 0.15 power of the excitation laser intensity, and the dynamics of MPA-induced orientation are described by a theoretical model for MPA selective bleaching.

© 2006 Optical Society of America

OCIS Codes
(020.4180) Atomic and molecular physics : Multiphoton processes
(160.4890) Materials : Organic materials
(160.5470) Materials : Polymers
(190.4180) Nonlinear optics : Multiphoton processes

ToC Category:
Nonlinear Optics

History
Original Manuscript: August 12, 2005
Revised Manuscript: November 21, 2005
Manuscript Accepted: November 23, 2005

Citation
Hidekazu Ishitobi, Zouheir Sekkat, and Satoshi Kawata, "Photo-orientation by multiphoton photoselection," J. Opt. Soc. Am. B 23, 868-873 (2006)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-23-5-868

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