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Optica Publishing Group
  • International Quantum Electronics Conference
  • OSA Technical Digest (Optica Publishing Group, 1984),
  • paper ThDD5

Chaotic Dynamics in Infrared Multiple-Photon Absorption

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Abstract

Experiments with many polyatomic molecules indicate that infrared multiple-photon absorption is fluence dependent rather than intensity dependent. We consider an anharmonic vibrational mode pumped by a laser and coupled to a quasi-continuum of background modes. For realistic molecular parameters the laser-molecule dynamics are chaotic, with the consequence that the number of absorbed photons increases with the fluence of the applied field. Chaotic dynamics is also found in a vibration-rotation model. Reasons are given for expecting our conclusions to be relatively insensitive to the details of our model.

© 1984 Optical Society of America

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