Raman light scattering, infrared absorption and DSC studies of the phase transition and vibrational and reorientational dynamics of H2 O ligands and ClO4 - anions in [Ba(H2 O)3 ](ClO4 )2

2012 ◽  
Vol 43 (8) ◽  
pp. 1118-1125 ◽  
Author(s):  
Joanna Hetmańczyk ◽  
Łukasz Hetmańczyk ◽  
Anna Migdał-Mikuli ◽  
Edward Mikuli ◽  
Aleksandra Wesełucha-Birczyńska
Keyword(s):  
Phase Transition ◽  
Light Scattering ◽  
Infrared Absorption ◽  
Dsc Studies ◽  
Raman Light Scattering ◽  
Reorientational Dynamics

Nonlinear Optical Absorption and Related Phenomena in Liquid Crystals

2001 ◽  
Vol 709 ◽  
Author(s):  
N.V. Tabiryan ◽  
U.A. Hrozhyk ◽  
H.L. Margaryan ◽  
M.J. Mora ◽  
S.R. Nersisyan ◽  
...  
Keyword(s):  
Phase Transition ◽  
Light Scattering ◽  
Optical Absorption ◽  
Nonlinear Absorption ◽  
Nonlinear Optical ◽  
Isotropic Phase ◽  
Nonlinear Optical Absorption ◽  
Critical Opalescence ◽  
Application Potential ◽  
Large Application

SUMMARYThus, in the present paper, we reported about several processes of nonlinear absorption and transmission in dye-doped NLC: nonlinear absorption due to light induced reorientation of NLC doped by highly dichroic dyes; nonlinear transmission due to nonlinear birefringence, and self-extinguishing of the beam due to”critical opalescence,” critically enhanced light scattering at the pre-transition region of nematic-isotropic phase transition. All these processes have large application potential for laser beam control and characterization techniques.

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