Chaotic absorption of coherent laser light by an anharmonic molecule

Michael Yu Uleysky; Sergey V. Prants

doi:10.1117/12.468931

29 May 2002 Chaotic absorption of coherent laser light by an anharmonic molecule

Michael Yu Uleysky, Sergey V. Prants

Proceedings Volume 4748, ICONO 2001: Fundamental Aspects of Laser-Matter Interaction and Physics of Nanostructures; (2002) https://doi.org/10.1117/12.468931
Event: XVII International Conference on Coherent and Nonlinear Optics (ICONO 2001), 2001, Minsk, Belarus

Abstract

A model for multiple photon excitation of molecular vibrational modes by an infrared laser field is developed. The closed semiclassical Heisenberg equations of motion for a periodically driven anharmonic oscillator with two degrees of freedom are derived. The equations for a free nonlinear oscillator with two degrees of freedom are shown to be integrable with solution in terms of Jacobian elliptic functions resulting in a strictly regular intermode exchange of energy. When illuminating the molecule by a periodic infrared laser field, the absorption may strongly depend on the values of the molecular and laser parameters. We find numerically that the molecule may absorb coherent laser light chaotically. A mechanism of the onset of Hamiltonian chaos in our system is studied, using Poincare sections.

Citation Download Citation

Michael Yu Uleysky and Sergey V. Prants "Chaotic absorption of coherent laser light by an anharmonic molecule", Proc. SPIE 4748, ICONO 2001: Fundamental Aspects of Laser-Matter Interaction and Physics of Nanostructures, (29 May 2002); https://doi.org/10.1117/12.468931

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