Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
Emergence of circularity at linear polarized excitation of molecules M. P. Auzinsh and FL S. Ferber
 

Summary: Emergence of circularity at linear polarized excitation of molecules
M. P. Auzinsh and FL S. Ferber
Department of Physics, University of Latvia, Riga L V-1586, Latvia
(Received 27 April 1993; accepted 8 July 1993)
General conditions causing partial transformation of optical alignment of excited state angular
momenta J into orientation at weak linear polarized broad line excitation of molecules are
examined. As is shown, the phenomenon takes place under the effect of an external perturbing
factor leading to such magnetic sublevel A4 splitting oMMt when wMMI1 # timMrleM and
wMMl is of the order of molecular state relaxation rate. An analytical expression is obtained
describing the appearing circularity of fluorescence for arbitrary J values. A numeric example is
given for `Z state molecules with J= 10 assuming a quadratic Stark effect in a homogeneous
external electric field.
1. INTRODUCTION
Excitation of an ensemble of particles (atoms, mole-
cules) with a directed light beam is known to produce
anisotropic angular momenta distribution possessing cylin-
drical symmetry around a certain axis (z axis). If there
exists such a plane perpendicular to the z axis that the
momenta distribution remains unchanged at reflection in
this plane, we have alignment of angular momenta of the

  

Source: Auzinsh, Marcis - Department of Physics, University of Latvia

 

Collections: Physics