Concentration effect of Cadmium Selenide Sulphide/Zinc Sulphide quantum dots on electro-optic and dielectric properties in nematic liquid crystals composite

2018 ◽  
Vol 550 ◽  
pp. 47-59 ◽  
Author(s):  
Gülsüm Kocakülah ◽  
Gülnur Önsal ◽  
Kadir Goksen ◽  
İsmail Ercan ◽  
Oğuz Köysal
Keyword(s):  
Quantum Dots ◽  
Liquid Crystals ◽  
Dielectric Properties ◽  
Cadmium Selenide ◽  
Nematic Liquid Crystals ◽  
Zinc Sulphide ◽  
Concentration Effect ◽  
Electro Optic

scholarly journals Impact of terminal polar substitution on elastic, electro-optic and dielectric properties of four-ring bent-core nematic liquid crystals

RSC Advances ◽  
2018 ◽  
Vol 8 (21) ◽  
pp. 11509-11516 ◽  
Author(s):  
R. K. Khan ◽  
S. Turlapati ◽  
N. Begum ◽  
G. Mohiuddin ◽  
N. V. S. Rao ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Dielectric Properties ◽  
Nematic Liquid Crystals ◽  
Switching Behavior ◽  
Electro Optic ◽  
Elastic Dielectric

Here we report the influence of terminal –F, –Cl and –NO2 substitution on the elastic, dielectric and polar switching behavior of four-ring bent-core liquid crystals (LCs).

scholarly journals Addressable Refraction and Curved Soliton Waveguides Using Electric Interfaces

2019 ◽  
Vol 9 (2) ◽  
pp. 347 ◽  
Author(s):  
Eugenio Fazio ◽  
Massimo Alonzo ◽  
Alessandro Belardini
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Total Reflection ◽  
Spatial Solitons ◽  
The Past ◽  
Curved Structures ◽  
Electro Optic ◽  
Propagation Losses ◽  
Complex Circuits

A great deal of interest over the years has been directed to the optical space solitons for the possibility of realizing 3D waveguides with very low propagation losses. A great limitation in their use for writing complex circuits is represented by the impossibility of making curved structures. In the past, solitons in nematic liquid crystals, called nematicons, were reflected on electrical interfaces, and more recently photorefractive spatial solitons have been, as well. In the present work, we investigate refraction and total reflection of spatial solitons with saturable electro-optic nonlinearity, such as the photorefractive ones, on an electric wall acting as a reflector. Using a custom FDTD code, the propagation of a self-confined beam was analyzed as a function of the applied electric bias. The electrical reflector was simulated by applying different biases in two adjacent volumes. We observed both smaller and larger angles of refraction, up to the critical π/2-refraction condition, and then the total reflection. The radii of curvature of the associated guides can be varied from centimeters down to hundreds of microns. The straight guides showed losses as low as 0.07 dB/cm as previously observed, while the losses associated with single curves were estimated to be as low as 0.2 dB.

scholarly journals A comparative study of nematic liquid crystals doped with harvested and non-harvested ferroelectric nanoparticles: phase transitions and dielectric properties

RSC Advances ◽  
2017 ◽  
Vol 7 (56) ◽  
pp. 35438-35444 ◽  
Author(s):  
Y. Lin ◽  
A. Daoudi ◽  
F. Dubois ◽  
J.-F. Blach ◽  
J.-F. Henninot ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Liquid Crystal ◽  
Liquid Crystals ◽  
Dielectric Properties ◽  
Comparative Study ◽  
Dielectric Spectroscopy ◽  
Nematic Liquid Crystals ◽  
Broadband Dielectric Spectroscopy

Broadband dielectric spectroscopy is used to determine the dielectric properties and phase transitions of the 4-n-octyl-4′-cyanobiphenyl liquid crystal (8CB) doped with harvested and non-harvested ferroelectric nanoparticles.

Study of dynamics and relaxation optical response of nematic liquid crystals doped with CdSe/ZnS quantum dots

2014 ◽  
Vol 41 (9) ◽  
pp. 1229-1234 ◽  
Author(s):  
E.A. Konshina ◽  
I.F. Galin ◽  
D.P. Shcherbinin ◽  
E.O. Gavrish
Keyword(s):  
Quantum Dots ◽  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Optical Response

Electro-optic effects in nematic liquid crystals

1991 ◽  
Vol 127 (1) ◽  
pp. 259-263 ◽  
Author(s):  
M. Marthandappa ◽  
R. Somashekar ◽  
Nagappa
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Electro Optic
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