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Proceedings Paper

Nonlinear absorption of organic compounds in the picosecond laser radiation field
Author(s): A. H. Arutunian; Vladimir A. Hovanessian; K. A. Sarkissian
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Paper Abstract

Unique possibilities of the active influence of laser radiation light field on compounds, in particular, the use of different methods and approaches based on the nonlinear optical phenomena allow in a new fashion to come in the resolution of such important problems as isotope separation detection of single atoms and molecules, initiation and control of chemical reactions, selective photomodefication of biological molecules, etc. With the creation of powerful lasers it becomes possible to observe many nonlinear effects as a result of the interaction of intensive light field with substances. In the papers by G. A. Askarian,' F. V. Bunkin ei al.2 ithas been considered theoretically the possibilities and the conditions of multiquantum excitation of molecular oscillations and direct photodissociation. The creation of powerful CO2 lasers allows to realize experimentally multiquantum absorption by vibration-rotation states and to observe the decay of some simple molecule in gas phase.3 There are other mechanisms of photodecomposition of molecules in the case of the action of powerful visible and near IR lasers. In rather strong light fields, when the selection rules for vibration-rotation transitions are disturbed very interesting nonlinear effects are possible: absorption of laser photon and straight throw over some vibrational levels, the appearance of absorption lines of homopolar molecules in those sections of the spectrum, where these molecules do not show optical activity in the light field of small intensities and so on.1 At present there are only some papers concerning the given mechanism for the initiation of chemical reactions.4

Paper Details

Date Published: 1 April 1991
PDF: 5 pages
Proc. SPIE 1402, USSR-CSFR Joint Seminar on Nonlinear Optics in Control, Diagnostics, and Modeling of Biophysical Processes, (1 April 1991); doi: 10.1117/12.47510
Show Author Affiliations
A. H. Arutunian, GAM Laserayin Tekhnika (Armenia)
Vladimir A. Hovanessian, GAM Laserayin Tekhnika (Armenia)
K. A. Sarkissian, GAM Laserayin Tekhnika (Armenia)

Published in SPIE Proceedings Vol. 1402:
USSR-CSFR Joint Seminar on Nonlinear Optics in Control, Diagnostics, and Modeling of Biophysical Processes
Sergei A. Akhmanov; Victor N. Zadkov, Editor(s)

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