Temperature dependence of the director reorientation of dye-doped nematic liquid crystals subjected to an optical field and its relation with the non-linear absorption coefficient

2002 ◽  
Vol 29 (5) ◽  
pp. 733-742 ◽  
Author(s):  
J. Esteves ◽  
A. M. Figueiredo Neto
Keyword(s):  
Liquid Crystals ◽  
Absorption Coefficient ◽  
Temperature Dependence ◽  
Nematic Liquid Crystals ◽  
Optical Field ◽  
Linear Absorption Coefficient ◽  
Linear Absorption ◽  
Non Linear ◽  
Director Reorientation

Oligooxyethylene liquid phthalocyanines

2000 ◽  
Vol 04 (05) ◽  
pp. 518-524 ◽  
Author(s):  
ARTHUR W. SNOW ◽  
JAMES S. SHIRK ◽  
RICHARD G. S. PONG
Keyword(s):  
Optical Properties ◽  
Absorption Coefficient ◽  
Visible Region ◽  
Linear Absorption Coefficient ◽  
Linear Absorption ◽  
Saturable Absorbers ◽  
Optical Limiter ◽  
Volatile Liquid ◽  
Non Linear ◽  
Linear Optical Properties

A series of methyl-terminated oligooxyethylene ( CH 3( OCH 2 CH 2)n O , n = 8.8)-substituted phthalocyanines with peripheral substitution at four β positions, at four α positions and at the eight α positions was synthesized and structurally characterized. These compounds are isotropic liquids above 10 °C. Non-linear optical properties of the tetra-α- and tetra-β-substituted compounds were examined. Both are reverse saturable absorbers in the visible region of the spectrum, but the tetra-α-substituted compound has the larger non-linear absorption coefficient and can be a useful optical limiter in cases where a non-volatile liquid is desirable.

EPR Study of the Temperature Dependence of Molecular Rotation in Nematic Liquid Crystals

1971 ◽  
Vol 12 (4) ◽  
pp. 335-344 ◽  
Author(s):  
C. F. Schwerdtfeger ◽  
M. Marušič ◽  
A. Mackay ◽  
R. Y. Dong
Keyword(s):  
Liquid Crystals ◽  
Temperature Dependence ◽  
Nematic Liquid Crystals ◽  
Molecular Rotation

Light-Induced Director Reorientation in Nematic Liquid Crystals Doped with Azobenzene-Containing Macromolecules of Different Architecture

2008 ◽  
Vol 488 (1) ◽  
pp. 265-278 ◽  
Author(s):  
A. S. Zolot'ko ◽  
I. A. Budagovsky ◽  
V. N. Ochkin ◽  
M. P. Smayev ◽  
A. Yu. Bobrovsky ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Director Reorientation

Optical Absorption In Hg1−xCdxTe

1997 ◽  
Vol 484 ◽  
Author(s):  
Vaidya Nathan
Keyword(s):  
Experimental Data ◽  
Optical Absorption ◽  
Band Structure ◽  
Absorption Coefficient ◽  
Numerical Results ◽  
Recent Experimental Data ◽  
Narrow Gap ◽  
Interband Transitions ◽  
Linear Absorption Coefficient ◽  
Linear Absorption

AbstractThe theory of optical absorption due to interband transitions in direct-gap semiconductors is revisited. A new analytical expression for linear absorption coefficient in narrow-gap semiconductors is obtained by including the nonparabolic band structure due to Keldysh and Burstein-Moss shift. Numerical results are obtained for Hg1−xCdxTe for several values of x and temperature, and compared with recent experimental data. The agreement is found to be good.

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