Ar+-laser induced alignment of NO2 ground sublevels in a room temperature cell

Vladimir Polischuk; Georgy Todorov; Lyubomir Petrov; S. Rashev

doi:10.1117/12.618457

22 April 2005 Ar+-laser induced alignment of NO₂ ground sublevels in a room temperature cell

Vladimir Polischuk, Georgy Todorov, Lyubomir Petrov, S. Rashev

Author Affiliations +

Proceedings Volume 5830, 13th International School on Quantum Electronics: Laser Physics and Applications; (2005) https://doi.org/10.1117/12.618457
Event: 13th International School on Quantum Electronics: Laser Physics and Applications, 2004, Bourgas, Bulgaria

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).

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Vladimir Polischuk, Georgy Todorov, Lyubomir Petrov, and S. Rashev "Ar+-laser induced alignment of NO₂ ground sublevels in a room temperature cell", Proc. SPIE 5830, 13th International School on Quantum Electronics: Laser Physics and Applications, (22 April 2005); https://doi.org/10.1117/12.618457

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