scholarly journals The Liquid Crystal Modulator on the Basis of the Waveguide Mode in the Twist Structure with the High Twist Angle

2015 ◽  
Vol 15 (3) ◽  
pp. 24-30
Author(s):  
G. V. Simonenko ◽  
◽  
S. A. Studentsov ◽  
V.A. Ezhov ◽  
◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Waveguide Mode ◽  
Twist Angle ◽  
High Twist ◽  
Twist Structure

Theoretical study of the surface anchoring effect on the full leaky waveguide mode of liquid crystal

2018 ◽  
Vol 33 (6) ◽  
pp. 483-489
Author(s):  
孙婷婷 SUN Ting-ting ◽  
袁 瑞 YUAN Rui ◽  
李振杰 LI Zhen-jie ◽  
朱吉亮 ZHU Ji-liang ◽  
邢红玉 XING Hong-yu ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Waveguide Mode ◽  
Theoretical Study ◽  
Surface Anchoring ◽  
Anchoring Effect ◽  
Leaky Waveguide

Gapped Surface Plasmon Polariton Waveguide Device Based on a Liquid Crystal

2015 ◽  
Vol 15 (10) ◽  
pp. 7711-7716 ◽  
Author(s):  
Dong Hun Lee ◽  
Myung-Hyun Lee
Keyword(s):  
Liquid Crystal ◽  
Surface Plasmon ◽  
Surface Plasmon Polariton ◽  
Twist Angle ◽  
Coupling Loss ◽  
Metal Insulator ◽  
Input Surface ◽  
Device Applications ◽  
Plasmon Polariton ◽  
Plasmon Polaritons

We propose a gapped surface plasmon polariton waveguide (G-SPPW) device based on a liquid crystal (LC) at a wavelength of 1.55 μm. The G-SPPW device is composed of an input 2.0-μm-wide and 5.0-μm-long insulator-metal-insulator waveguide (IMI-W), an 8-μm-long gap, and an output 2.0-μm-wide and 25.0-μm-long IMI-W. The LC is used for the gap and the 5.15-μm-thick upper and lower dielectric layers. The input surface plasmon polaritons (SPPs) propagate and jump over the gap in the G-SPPW with a coupling loss of less than ∼0.68 dB. The propagation and coupling losses of the 38-μm-long G-SPPW device are varied in the range of ∼0.5268 dB to ∼2.6716 dB and ∼0.1446 dB to ∼0.6784 dB, respectively, with LC tilt angles (1, 2) = 0° ∼ 90° at a fixed 90° twist angle. The normalized transmission of the G-SPPW device is also varied in the range from −3.351 dB to −0.6714 dB with 1, 2 = 0° ∼ 90° at a fixed 90° twist angle. The output SPP characteristics of the G-SPPW device can be properly controlled by the orientation of the LC molecules. The proposed G-SPPW device shows potential for new active plasmonic device applications.

Method for measuring the twist angle and thickness of liquid crystal polarization grating based on Jones matrix

2021 ◽  
Vol 36 (5) ◽  
pp. 656-662
Author(s):  
Jin CHEN ◽  
◽  
Cheng-liang YANG ◽  
Quan-quan MU ◽  
Qi-dong WANG ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Twist Angle ◽  
Jones Matrix ◽  
Polarization Grating

Measurement of twist angle and surface torsional anchoring strength in a nematic liquid crystal cell

1995 ◽  
Vol 18 (3) ◽  
pp. 419-422 ◽  
Author(s):  
Jiang Min ◽  
Huang Ximin ◽  
Wang Zongkai ◽  
Ma Kai ◽  
Sun Ruipeng ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Twist Angle ◽  
Liquid Crystal Cell ◽  
Crystal Cell ◽  
Anchoring Strength

Refractive index matched half-wave plate with a nematic liquid crystal for three-dimensional laser metrology applications

2016 ◽  
Vol 24 (4) ◽  
Author(s):  
W. Piecek ◽  
L.R. Jaroszewicz ◽  
E. Miszczyk ◽  
Z. Raszewski ◽  
M. Mrukiewicz ◽  
...  
Keyword(s):  
Refractive Index ◽  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Twist Angle ◽  
Three Dimensional ◽  
Light Polarization ◽  
Half Wave Plate ◽  
Wave Plate ◽  
Half Wave ◽  
Laser Metrology

AbstractThere exists a need in a quality and accuracy of a three-dimensional laser metrology operating in numerically controlled automatic machines. For this purpose, one sends three laser beams mutually perpendicular. These three beams of the wavelength λ = 0.6328 μm are generated by the same laser and are directed along three independent, orthogonal, mutually perpendicular, optical paths with a given light polarization plain. Using these beams, constituting the frame of coordinates, three independent laser rangefinders are able to determine spatial coordinates of a working tool or a workpiece. To form these optical pulses, a special refractive index matched Half-Wave Plate with nematic Liquid Crystal (LCHWP) was applied. The presented half-wave plate is based on a single Twisted Nematic (TN) cell (with the twist angle

Numerical Study on Liquid Crystalline Actuators Using Back-Flow Effect

2011 ◽  
Vol 211-212 ◽  
pp. 430-433
Author(s):  
Chun Bo Liu ◽  
Long Wang Yue ◽  
Xiao Xia Liu
Keyword(s):  
Liquid Crystal ◽  
Electric Field ◽  
Liquid Crystalline ◽  
Numerical Study ◽  
Twist Angle ◽  
Parallel Plates ◽  
Plane Component ◽  
Out Of Plane ◽  
Induced Flow ◽  
Micro Actuators

As a purpose of developing micro-actuators driven by liquid crystals, transient behaviors of a nematic liquid crystal between two parallel plates under an electric field have investigated numerically by using the Leslie-Ericksen theory. Twist angle has been selected as computational parameters. Imposition of an electric field on a liquid crystal induces backflow whose profile and magnitude depend strongly on the twist angle of the director. When the twist angle is 0 degree, the induced flow is planar, and with increasing of the twist angle, the flow has an out of plane component, and finally the profile becomes unidirectional when the twist angle reaches 180 degrees.

Dynamically Manipulating Beam with Metallic Nano-Optic Lens Containing Liquid Crystal

2012 ◽  
Vol 571 ◽  
pp. 287-291 ◽  
Author(s):  
Ji Cheng Wang ◽  
Xia Zhou ◽  
Jie Gao ◽  
Zhe Tao Xu ◽  
Lin Sun ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Waveguide Mode ◽  
Deflection Angle ◽  
Beam Splitting ◽  
Electrical Field ◽  
Beam Focusing ◽  
External Electrical Field ◽  
Liquid Crystal Material ◽  
The Deflection Angle ◽  
Splitting Angle

A set of metallic nano-optic lens with liquid crystal material embedded in the slits is proposed as a new idea of dynamically manipulating beam. Three kinds of metallic nano-optic lens can achieve the functions of beam deflecting, beam splitting and beam focusing respectively. The deflection angle, splitting angle and focus length can be controlled by external electrical field easily. The three phenomena are based on the principal that changing the external electrical field can control the phase of the waveguide mode in the slits.

Sign in / Sign up

Export Citation Format

Share Document