Dielectric relaxation and electro-optical switching behavior of nematic liquid crystal dispersed in poly(methyl methacrylate)

2012 ◽  
Vol 358 (18-19) ◽  
pp. 2713-2722 ◽  
Author(s):  
S.S. Parab ◽  
M.K. Malik ◽  
R.R. Deshmukh
Keyword(s):  
Liquid Crystal ◽  
Methyl Methacrylate ◽  
Dielectric Relaxation ◽  
Nematic Liquid Crystal ◽  
Optical Switching ◽  
Switching Behavior ◽  
Poly Methyl Methacrylate

scholarly journals Enhanced Optical Switching Characteristics of Organic Phototransistor by Adopting Photo-Responsive Polymer in Hybrid Gate-Insulator Configuration

Polymers ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 527 ◽  
Author(s):  
Hea-Lim Park ◽  
Min-Hoi Kim ◽  
Hyeok Kim
Keyword(s):  
Methyl Methacrylate ◽  
Interfacial Layer ◽  
Optical Switching ◽  
Uv Light ◽  
Charge Carriers ◽  
Gate Insulator ◽  
Poly Methyl Methacrylate ◽  
Responsive Polymer ◽  
Switching Characteristics ◽  
Organic Phototransistor

In this study, we developed polymer gate insulator-based organic phototransistors (p-OPTs) with improved optical switching properties by using a hybrid gate insulator configuration. The hybrid gate insulator of our p-OPT has a photoresponsive layer made of poly(4-vinylphenol) (PVP), which enhances the photoresponse, and an interfacial layer of poly(methyl methacrylate) for reliable optical switching of the device. Our hybrid gate insulator-equipped p-OPT exhibits well-defined optical switching characteristics because no specific type of charge is significantly trapped at an interfacial layer/organic semiconductor (OSC) interface. Moreover, our device is more photoresponsive than the conventional p-OPT (here, an OPT with a single-polymer poly(methyl methacrylate) (PMMA) gate insulator), because the characteristic ultraviolet (UV) absorption of the PVP polymer allows the photoresponsive layer and OSC to contribute to the generation of charge carriers when exposed to UV light.

STUDIES OF SOME PECULIARITIES OF NONLINEAR DYNAMICS OF FOUR-WAVE MIXING OF LIGHT WAVES PROPAGATING FORWARD IN LIQUID CRYSTAL ON THERMAL NONLINEARITY

1999 ◽  
Vol 08 (03) ◽  
pp. 403-418
Author(s):  
SERGEY A. PODOSHVEDOV
Keyword(s):  
Nonlinear Dynamics ◽  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Analytical Solutions ◽  
Optical Switching ◽  
Four Wave Mixing ◽  
Wave Mixing ◽  
Thermal Nonlinearity ◽  
Light Waves

Evolution of four waves propagating forward in nematic liquid crystal is studied using Hamiltonian representation of initial equations describing the process. Here we extend theory of the four-wave mixing on thermal nonlinearity of nematic liquid crystal. All types of analytical solutions are found for these equations. The possibilities of observing of optical switching in this mixing are discussed.

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