Role of subsurface elastic phenomena on the macroscopic properties of nematic liquid crystals

1996 ◽  
Author(s):  
Sandro Faetti
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Macroscopic Properties

scholarly journals REFRACTION OF NONLINEAR LIGHT BEAMS IN NEMATIC LIQUID CRYSTALS

2012 ◽  
Vol 21 (03) ◽  
pp. 1250033 ◽  
Author(s):  
GAETANO ASSANTO ◽  
NOEL F. SMYTH ◽  
WENJUN XIA
Keyword(s):  
Steady State ◽  
Liquid Crystals ◽  
Solitary Waves ◽  
Nematic Liquid Crystals ◽  
Optical Solitons ◽  
Numerical Results ◽  
Dielectric Interface ◽  
Modulation Theory ◽  
Light Beams

We use modulation theory to analyze the interaction of optical solitons and vortices with a dielectric interface between two regions of nematic liquid crystals. In the analysis we consider the role of nonlocality, anisotropy and nonlinear reorientation and compare modulation theory results with numerical results. Upon interacting with the interface, nematicons undergo transverse distortion but remain stable and eventually return to a steady state, whereas vortices experience an enhanced instability and can break up into bright beams or solitary waves.

Random lasing in dye doped nematic liquid crystals: the role of confinement geometry

2007 ◽  
Author(s):  
G. Strangi ◽  
S. Ferjani ◽  
V. Barna ◽  
A. De Luca ◽  
C. Versace ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Random Lasing

HIGHLY NONLOCAL OPTICAL SOLITONS AND THEIR OBSERVATION IN NEMATIC LIQUID CRYSTALS

2004 ◽  
Vol 18 (20n21) ◽  
pp. 2819-2828 ◽  
Author(s):  
GAETANO ASSANTO ◽  
CLAUDIO CONTI ◽  
MARCO PECCIANTI
Keyword(s):  
Liquid Crystals ◽  
General Theory ◽  
Nematic Liquid Crystals ◽  
Optical Solitons ◽  
Spatial Solitons ◽  
Specific System ◽  
Arbitrary Degree ◽  
Self Focusing ◽  
Remarkable Agreement

We investigate 2-dimensional spatial optical solitons in media exhibiting a large nonlocal response coupled with a self-focusing nonlinearity. To this extent, with reference to a specific system in undoped nematic liquid crystals, we develop a general theory of spatial solitons in media with an arbitrary degree of nonlocality and carry out experimental observations to validate the model. The remarkable agreement between predictions and data yields evidence of narrow-waist solitons, revealing an important connection between nonparaxiality and nonlocality and emphasizing the role of nonlocality.

Role of E/Z Photoisomerization of Cinnamate Side Chains Attached to Polymer Backbones in the Alignment Photoregulation of Nematic Liquid Crystals*1

1996 ◽  
Vol 35 (Part 2, No. 8A) ◽  
pp. L992-L995 ◽  
Author(s):  
Kunihiro Ichimura ◽  
Yasuhiro Akita ◽  
Haruhisa Akiyama ◽  
Yuko Hayashi ◽  
Kazuaki Kudo
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Side Chains

scholarly journals Conjugation of Nanomaterials and Nematic Liquid Crystals for Futuristic Applications and Biosensors

Biosensors ◽  
2018 ◽  
Vol 8 (3) ◽  
pp. 69 ◽  
Author(s):  
Amit Choudhary ◽  
Thomas George ◽  
Guoqiang Li
Keyword(s):  
Liquid Crystals ◽  
Detection Efficiency ◽  
Nematic Liquid Crystals ◽  
Rapid Development ◽  
Future Application ◽  
Operating Voltage ◽  
Voltage Variation ◽  
Electric Dipoles ◽  
Established Role

The established role of nematic liquid crystals (NLCs) in the recent rapid development of displays has motivated researchers to modulate the electro-optical properties of LCs. Furthermore, adding nanomaterials into NLCs has led to enhancements of the properties of NLCs, like reduced threshold of the operating voltage, variation in pretilt angle, reduced switching time, etc. These enhanced properties, due to interfacial dynamics, are enabling wider applications of NLCs and nanomaterials. The recent literature of nanomaterial-doped NLCs is rich with various kinds of nanomaterials in a variety of NLCs. The light has been focused on the most widely used and studied gold nanoparticles in NLCs. The intrinsic inherent property of easy excitation of surface plasmons polaritons (SPP) is the mediating interaction of NLC electric dipoles and the polarization of charges in the GNP surface. The concepts and methods for the application of metal nanomaterials as dopants in NLCs are discussed for future applications, especially biosensors. The biosensing application of NLCs alone has already been proven in the literature. However, it is always desirable to further enhance the detection efficiency and selectivity, which have been achieved by the conjugation of GNPs and nickel nanoparticles with NLCs and their compatibility with biological materials. This aspect of future application of nanoparticles and NLC makes the point more selective to be included in the present manuscript.

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