Polarization Singularities Nucleation in the Self-focusing of an Elliptically Polarized Laser Beam in Kerr Medium and Isotropic Phase of Nematic Liquid Crystal

2019 ◽  
pp. 3-17
Author(s):  
Vladimir A. Makarov ◽  
Kirill S. Grigoriev ◽  
Nikolai A. Panov ◽  
Olga G. Kosareva ◽  
Georgy M. Shishkov
Keyword(s):  
Liquid Crystal ◽  
Laser Beam ◽  
Nematic Liquid Crystal ◽  
The Self ◽  
Isotropic Phase ◽  
Kerr Medium ◽  
Self Focusing ◽  
Elliptically Polarized

Generation of polarization singularities in the self-focusing of an elliptically polarized laser beam in an isotropic Kerr medium

2016 ◽  
Vol 332 ◽  
pp. 73-78 ◽  
Author(s):  
N.A. Panov ◽  
V.A. Makarov ◽  
K.S. Grigoriev ◽  
M.S. Yatskevitch ◽  
O.G. Kosareva
Keyword(s):  
Laser Beam ◽  
The Self ◽  
Kerr Medium ◽  
Self Focusing ◽  
Elliptically Polarized

Laser Beam Shaping using Self-Focusing in a Nematic Liquid Crystal

2006 ◽  
Vol 454 (1) ◽  
pp. 217/[619]-224/[626] ◽  
Author(s):  
Andriy Shevchenko ◽  
Antti Hakola ◽  
Scott C. Buchter ◽  
Matti Kaivola ◽  
Nelson V. Tabiryan
Keyword(s):  
Liquid Crystal ◽  
Laser Beam ◽  
Nematic Liquid Crystal ◽  
Beam Shaping ◽  
Laser Beam Shaping ◽  
Self Focusing

Self‐focusing of laser light in the isotropic phase of a nematic liquid crystal

1973 ◽  
Vol 23 (10) ◽  
pp. 539-540 ◽  
Author(s):  
D. V. G. L. Narasimha Rao ◽  
S. Jayaraman
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Laser Light ◽  
Isotropic Phase ◽  
Self Focusing

Relativistic self-focusing of a rippled laser beam in a plasma

1999 ◽  
Vol 62 (4) ◽  
pp. 389-396 ◽  
Author(s):  
M. V. ASTHANA ◽  
A. GIULIETTI ◽  
DINESH VARSHNEY ◽  
M. S. SODHA
Keyword(s):  
Refractive Index ◽  
Laser Beam ◽  
The Self ◽  
Laser Beams ◽  
Radial Dependence ◽  
Main Beam ◽  
Gaussian Laser Beam ◽  
Self Focusing ◽  
Saturation Effects ◽  
Paraxial Ray

This paper presents an analysis of the relativistic self-focusing of a rippled Gaussian laser beam in a plasma. Considering the nonlinearity as arising owing to relativistic variation of mass, and following the WKB and paraxial-ray approximations, the phenomenon of self-focusing of rippled laser beams is studied for arbitrary magnitude of nonlinearity. Pandey et al. [Phys. Fluids82, 1221 (1990)] have shown that a small ripple on the axis of the main beam grows very rapidly with distance of propagation as compared with the self-focusing of the main beam. Based on this analogy, we have analysed relativistic self-focusing of rippled beams in plasmas. The relativistic intensities with saturation effects of nonlinearity allow the nonlinear refractive index in the paraxial regime to have a slower radial dependence, and thus the ripple extracts relatively less energy from its neighbourhood.

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