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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 27, Iss. 15 — Aug. 1, 2002
  • pp: 1285–1287

Absorption and subsequent emission saturation of two-photon excited materials: theory and experiment

R. Schroeder and B. Ullrich  »View Author Affiliations


Optics Letters, Vol. 27, Issue 15, pp. 1285-1287 (2002)
http://dx.doi.org/10.1364/OL.27.001285


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Abstract

The saturation of two-photon absorption and the subsequent photoluminescence of matter under ultrafast laser pulse excitation are studied. For this purpose the experimental results of using two organic conjugated polymers as model substances are discussed theoretically. One model is based on the commonly used hyperbolic approach, whereas the new theory introduced correctly describes the saturation in two-photon spectroscopy and fits the experiment closely. The new model permits microscopic analysis of the absorption saturation process and makes possible an estimate of the two-photon absorption coefficient from the saturation intensity.

© 2002 Optical Society of America

OCIS Codes
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(190.7220) Nonlinear optics : Upconversion
(250.3680) Optoelectronics : Light-emitting polymers
(250.5230) Optoelectronics : Photoluminescence

Citation
R. Schroeder and B. Ullrich, "Absorption and subsequent emission saturation of two-photon excited materials: theory and experiment," Opt. Lett. 27, 1285-1287 (2002)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-27-15-1285

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