scholarly journals Fast-response and high-efficiency optical switch based on dual-frequency liquid crystal polarization grating

2016 ◽  
Vol 6 (2) ◽  
pp. 597 ◽  
Author(s):  
Wei Duan ◽  
Peng Chen ◽  
Bing-Yan Wei ◽  
Shi-Jun Ge ◽  
Xiao Liang ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
High Efficiency ◽  
Optical Switch ◽  
Fast Response ◽  
Dual Frequency ◽  
Polarization Grating

Continuously tunable and fast-response terahertz metamaterials using in-plane-switching dual-frequency liquid crystal cells

2015 ◽  
Vol 40 (9) ◽  
pp. 2021 ◽  
Author(s):  
Chia-Chun Chen ◽  
Wei-Fan Chiang ◽  
Min-Cheng Tsai ◽  
Shun-An Jiang ◽  
Tsung-Hao Chang ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Fast Response ◽  
Dual Frequency ◽  
Crystal Cells ◽  
Terahertz Metamaterials

scholarly journals Fast Ferroelectric Liquid Crystal Based Optical Switch: Simulation and Experiments

Crystals ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 388 ◽  
Author(s):  
Sithara P. Sreenilayam ◽  
Dermot Brabazon ◽  
Yuri P. Panarin
Keyword(s):  
Experimental Investigation ◽  
Liquid Crystal ◽  
Response Time ◽  
Theoretical Result ◽  
Optical Switch ◽  
Fast Response ◽  
Ferroelectric Liquid Crystal ◽  
Performance Parameters ◽  
Exact Match ◽  
Significant Performance

The present work explains simulation and experimental investigation of the most significant performance parameters of a ferroelectric liquid crystal (FLC) optical switch. The measurements were carried out with commercially available FLC mixture (θ = 22.5°), having a very fast response time within the range of 1–10 μs. The best achieved cross talk was ~19 dB, which is an exact match with the theoretical result.

Dual-frequency liquid crystal-polymer grating for fast response optical beam steering

2019 ◽  
Vol 28 (10) ◽  
pp. 105036 ◽  
Author(s):  
Xiaobing Shang ◽  
Dieter Cuypers ◽  
Fang Chen ◽  
Chaowei Xu ◽  
Quan Li ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Beam Steering ◽  
Fast Response ◽  
Liquid Crystal Polymer ◽  
Optical Beam ◽  
Dual Frequency ◽  
Crystal Polymer ◽  
Polymer Grating

Fast response dual-frequency liquid crystal switch with photo-patterned alignments

2012 ◽  
Vol 37 (17) ◽  
pp. 3627 ◽  
Author(s):  
Xiao-Wen Lin ◽  
Wei Hu ◽  
Xi-Kui Hu ◽  
Xiao Liang ◽  
Ye Chen ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Fast Response ◽  
Dual Frequency

scholarly journals Ultrafast electrical switching of nanostructured metadevice with dual-frequency liquid crystal

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Rafał Kowerdziej ◽  
Jerzy Wróbel ◽  
Przemysław Kula
Keyword(s):  
Liquid Crystal ◽  
Soft Matter ◽  
Fast Response ◽  
Electrical Signal ◽  
Dielectric Anisotropy ◽  
Dual Frequency ◽  
Active Devices ◽  
Total Response Time ◽  
Development Direction ◽  
Hybrid Metamaterial

AbstractShortening of switching times of various soft-matter-based tunable metamaterials is one of the key challenges to improve the functionality of modern active devices. Here we show an effective strategy in the evolution of soft-matter-based tunable metamaterials that makes possible acceleration of both on and off switching processes by using a dual-frequency liquid crystal mixture. The frequency-convertible dielectric anisotropy of the dual-frequency mixture enabled us to create a fast-response in-plane switching metasurface at the nanoscale, which could be tuned by an electrical signal with different frequencies. The results clearly show that the resonance of the metamaterial can be continuously and reversibly controlled within a wavelength range of 100 nm as the applied frequency is inverted between 1 kHz and 40 kHz, with a total response time (τ = τON + τOFF) of 1.89 ms. Furthermore, experimental characteristics of the hybrid metamaterial are in great agreement with numerical calculations, which allow us to anticipate active epsilon-near-zero behavior of the metadevice. This work indicates the future development direction of liquid-crystal-based active plasmonic systems.

scholarly journals High Contrast and Fast Response Polarization-Independent Reflective Display Using a Dye-Doped Dual-Frequency Liquid Crystal Gel

2006 ◽  
Vol 453 (1) ◽  
pp. 371-378 ◽  
Author(s):  
Yi-Hsin Lin ◽  
Hongwen Ren ◽  
Sebastian Gauza ◽  
Yung-Hsun Wu ◽  
Ying Zhou ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Fast Response ◽  
High Contrast ◽  
Dual Frequency ◽  
Reflective Display ◽  
Polarization Independent

scholarly journals A Fast-Response and Helicity-Dependent Lens Enabled by Micro-Patterned Dual-Frequency Liquid Crystals

Crystals ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 111 ◽  
Author(s):  
Wei Duan ◽  
Peng Chen ◽  
Shi-Jun Ge ◽  
Xiao Liang ◽  
Wei Hu
Keyword(s):  
Liquid Crystals ◽  
High Efficiency ◽  
Switching Time ◽  
Berry Phase ◽  
Fast Response ◽  
Dual Frequency ◽  
Optical Elements ◽  
New Strategy ◽  
Patterning Technique ◽  
Liquid Crystal Lens

Liquid crystals are excellent candidates for tunable optical elements due to their large birefringence and continuous tunability by external fields. A dual-frequency liquid crystal lens integrated with Pancharatnam–Berry phase was fabricated via a dynamic photo-patterning technique. The proposed lens exhibited distinctive polarization-dependent characteristics and ultra-high efficiency rates of up to 95%. Via merely alternating the frequency of the applied electric field, the switching time between unfocused and focused states was measured in submilliseconds. This work supplies a new strategy for fast-response, high-efficiency and helicity-dependent lens with merits of easy fabrication and low power consumption.

High-efficiency aerial display using a liquid crystal polarization grating, a retroreflector array, and a right-angle prism

2020 ◽  
Vol 59 (14) ◽  
pp. 4228
Author(s):  
Moritsugu Sakamoto ◽  
Koya Yamada ◽  
Ryusei Momosaki ◽  
Kohei Noda ◽  
Tomoyuki Sasaki ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
High Efficiency ◽  
Polarization Grating

scholarly journals Liquid Crystal Beam Steering Devices: Principles, Recent Advances, and Future Developments

Crystals ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 292 ◽  
Author(s):  
Ziqian He ◽  
Fangwang Gou ◽  
Ran Chen ◽  
Kun Yin ◽  
Tao Zhan ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
High Efficiency ◽  
Response Times ◽  
Beam Steering ◽  
Polymer Network ◽  
Large Angle ◽  
Fast Response ◽  
Wide Field ◽  
Recent Advances ◽  
Optical Phased Array

Continuous, wide field-of-view, high-efficiency, and fast-response beam steering devices are desirable in a plethora of applications. Liquid crystals (LCs)—soft, bi-refringent, and self-assembled materials which respond to various external stimuli—are especially promising for fulfilling these demands. In this paper, we review recent advances in LC beam steering devices. We first describe the general operation principles of LC beam steering techniques. Next, we delve into different kinds of beam steering devices, compare their pros and cons, and propose a new LC-cladding waveguide beam steerer using resistive electrodes and present our simulation results. Finally, two future development challenges are addressed: Fast response time for mid-wave infrared (MWIR) beam steering, and device hybridization for large-angle, high-efficiency, and continuous beam steering. To achieve fast response times for MWIR beam steering using a transmission-type optical phased array, we develop a low-loss polymer-network liquid crystal and characterize its electro-optical properties.

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