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Proceedings Paper

Ar+-laser induced alignment of NO2 ground sublevels in a room temperature cell
Author(s): Vladimir Polischuk; Georgy Todorov; Lyubomir Petrov; S. Rashev
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Paper Abstract

In this work we discuss Hanle absorption resonances obtained in a room temperature NO2 cell, irradiated by a single mode Ar+ laser. The method used is based on measuring the changes of polarization of the transmitted laser beam crossing the NO2 cell, placed in a transverse magnetic field. The resonant changes in the measured absorption signal, that occur in the magnetic field, could be explained as destruction of the alignment of the absorbing rotational state(s), belonging to the ground state (0,0,0) X2A1. The observed signal is described as a sum, taken over all F'u and F"g values, for the chosen N",J"→N',J' transition. The numerical calculations show, that despite the contributions of terms with different signs, the total signal for all examined cases preserves its sign, the determining role being played by the most intensive hf components. Thus a confirmation of Chaika's hypothesis for creation of NO2 ground state levels (self)alignment is obtained as well an estimation of the effective life time for coherences τ(2).

Paper Details

Date Published: 22 April 2005
PDF: 5 pages
Proc. SPIE 5830, 13th International School on Quantum Electronics: Laser Physics and Applications, (22 April 2005); doi: 10.1117/12.618457
Show Author Affiliations
Vladimir Polischuk, Univ. of St. Petersburg (Russia)
Georgy Todorov, Institute of Electronics (Bulgaria)
Lyubomir Petrov, Institute of Electronics (Bulgaria)
S. Rashev, Institute of Solid State Physics (Bulgaria)

Published in SPIE Proceedings Vol. 5830:
13th International School on Quantum Electronics: Laser Physics and Applications
Peter A. Atanasov; Sanka V. Gateva; Lachezar A. Avramov; Alexander A. Serafetinides, Editor(s)

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