Nanosecond-cw visible-IR all-optical switching and nonlinear transmission with nonlinear organic optical liquids and liquid crystals

2007 ◽  
Author(s):  
I. C. Khoo ◽  
A. Diaz ◽  
J. Liou ◽  
J. H. Park ◽  
M. Stinger ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Optical Switching ◽  
Nonlinear Transmission ◽  
All Optical ◽  
All Optical Switching

All-optical switching and logic gating with spatial solitons in liquid crystals

2002 ◽  
Vol 81 (18) ◽  
pp. 3335-3337 ◽  
Author(s):  
Marco Peccianti ◽  
Claudio Conti ◽  
Gaetano Assanto ◽  
Antonio De Luca ◽  
Cesare Umeton
Keyword(s):  
Liquid Crystals ◽  
Optical Switching ◽  
Spatial Solitons ◽  
All Optical ◽  
All Optical Switching

DYNAMIC HOLOGRAPHIC GRATINGS IN METHYL RED-DOPED NEMATIC LIQUID CRYSTALS

2003 ◽  
Vol 12 (04) ◽  
pp. 441-446 ◽  
Author(s):  
O. RUZAK ◽  
N. COLLINGS ◽  
W. A. CROSSLAND ◽  
T. D. WILKINSON ◽  
A. B. DAVEY ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Cell Surface ◽  
Azo Dye ◽  
Optical Switching ◽  
Methyl Red ◽  
Holographic Gratings ◽  
Written Information ◽  
Dynamic Holography ◽  
All Optical ◽  
All Optical Switching

Orientational photorefractivity in liquid crystals doped with azo dye MR crystals is studied. The experiments are carried out with no voltage applied. Dynamic behavior and its dependence on writing beams intensity are presented. When excited by light, the dye tends to bond to the cell surface. Such an effect is irreversible and leads to the permanent component formation in diffracted signal. This is not beneficial for applications where change of written information is required (OASLMs, dynamic holography, all-optical switching). The process was strongly suppressed and was virtually eliminated for the light intensities used, by the choice of materials for alignment surfaces.

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