scholarly journals Design and Realization of a Compact Efficient Beam Combiner, Based on Liquid Crystal Pancharatnam–Berry Phase Gratings

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 220
Author(s):  
Boxuan Gao ◽  
Jeroen Beeckman ◽  
Kristiaan Neyts
Keyword(s):  
Liquid Crystal ◽  
Berry Phase ◽  
Polarized Light ◽  
Laser Beams ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Beam Combiner ◽  
High Diffraction Efficiency ◽  
High Diffraction ◽  
Crystal Mixture

We demonstrate a laser beam combiner based on four photo-patterned Pancharatnam–Berry (PB) phase gratings, which is compact and has high diffraction efficiency for incident circularly polarized light. The nematic liquid crystal mixture E7 is used as anisotropic material, and the thickness of the layer is controlled by spacers. The beam combiner can bring two parallel laser beams closer to each other while remaining parallel. This work shows the potential to realize components based on flat optical LC devices.

Nonlinear Behavior of Circularly Polarized Laser Beams Propagating through Sodium Vapor

1993 ◽  
Vol 48 (5-6) ◽  
pp. 621-623
Author(s):  
B. Röhricht ◽  
P. Eschle ◽  
S. Dangel ◽  
R. Holzner
Keyword(s):  
Laser Light ◽  
Polarized Light ◽  
Nonlinear Behavior ◽  
Laser Beams ◽  
Sodium Vapor ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Left Hand ◽  
Matter Interaction ◽  
Light Matter Interaction

Abstract A variety of surprising effects arise from the nonlinear light-matter interaction of circularly polarized laser light propagating through sodium vapor. We present experimental evidence for an asymmetry in the absorption of left hand and right hand circularly polarized light as well as for the creation of a collimated light beam of apposite polarization within the light-matter interaction region. Both effects are not yet explained by common theories.

Polymer stabilized liquid crystal films reflecting both right- and left-circularly polarized light

2008 ◽  
Vol 93 (20) ◽  
pp. 201901 ◽  
Author(s):  
Jinbao Guo ◽  
Hui Cao ◽  
Jie Wei ◽  
Duowei Zhang ◽  
Fang Liu ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Polarized Light ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Liquid Crystal Films ◽  
Crystal Films ◽  
Polymer Stabilized

Circularly polarized light generated by photoexcitation of luminophores in glassy liquid-crystal films

Nature ◽  
10.1038/17343 ◽  
1999 ◽  
Vol 397 (6719) ◽  
pp. 506-508 ◽  
Author(s):  
S. H. Chen ◽  
D. Katsis ◽  
A. W. Schmid ◽  
J. C. Mastrangelo ◽  
T. Tsutsui ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Polarized Light ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Liquid Crystal Films ◽  
Crystal Films

Switchable 3D liquid crystal grating generated by periodic photo-alignment on both substrates

Soft Matter ◽  
2015 ◽  
Vol 11 (39) ◽  
pp. 7802-7808 ◽  
Author(s):  
I. Nys ◽  
J. Beeckman ◽  
K. Neyts
Keyword(s):  
Liquid Crystal ◽  
Diffraction Pattern ◽  
Polarized Light ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Left And Right ◽  
Photo Alignment ◽  
Alignment Layers ◽  
Liquid Crystal Grating

A planar liquid crystal (LC) cell is developed in which two photo-alignment layers have been illuminated with respectively a horizontal and a vertical diffraction pattern of interfering left- and right-handed circularly polarized light.

Light‐induced formation of curved needle texture by circularly polarized light irradiation on a discotic liquid crystal containing a racemic chromium complex

2006 ◽  
Vol 33 (6) ◽  
pp. 671-679 ◽  
Author(s):  
Nobuhiro Anzai ◽  
Hiroko Kurihara ◽  
Masato Sone ◽  
Hidemitsu Furukawa ◽  
Toshiyuki Watanabe ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Polarized Light ◽  
Light Irradiation ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Chromium Complex ◽  
Discotic Liquid Crystal
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