Fast-response IR spatial light modulators with a polymer network liquid crystal

2015 ◽  
Author(s):  
Fenglin Peng ◽  
Haiwei Chen ◽  
Suvagata Tripathi ◽  
Robert J. Twieg ◽  
Shin-Tson Wu
Keyword(s):  
Liquid Crystal ◽  
Polymer Network ◽  
Fast Response ◽  
Spatial Light Modulators ◽  
Light Modulators

scholarly journals Submillisecond-Response Polymer Network Liquid Crystal Phase Modulators

Polymers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 2862
Author(s):  
Yannanqi Li ◽  
Zhiyong Yang ◽  
Ran Chen ◽  
Lingchao Mo ◽  
Juanli Li ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Light Scattering ◽  
Beam Steering ◽  
Polymer Network ◽  
Infrared Region ◽  
Dielectric Anisotropy ◽  
Spatial Light Modulators ◽  
Operating Voltage ◽  
Scattering Loss ◽  
Light Modulators

A submillisecond-response and light scattering-free polymer-network liquid crystal (PNLC) for infrared spatial light modulators is demonstrated. Our new liquid crystal host exhibits a higher birefringence, comparable dielectric anisotropy, and slightly lower visco-elastic constant than a commonly employed commercial material, HTG-135200. Moreover, the electro-optical performance of our PNLCs with different monomer concentrations, cell gaps, and liquid crystal (LC) hosts is compared and discussed from four aspects: operating voltage, hysteresis, relaxation time, and light scattering loss. The temperature effect on hysteresis is also analyzed. Potential applications of PNLCs for laser beam steering and spatial light modulators especially in the infrared region are foreseeable.

scholarly journals Low voltage polymer network liquid crystal for infrared spatial light modulators

2015 ◽  
Vol 23 (3) ◽  
pp. 2361 ◽  
Author(s):  
Fenglin Peng ◽  
Daming Xu ◽  
Haiwei Chen ◽  
Shin-Tson Wu
Keyword(s):  
Liquid Crystal ◽  
Low Voltage ◽  
Polymer Network ◽  
Spatial Light Modulators ◽  
Light Modulators

scholarly journals Fast-Response Liquid Crystal Phase Modulators with an Excellent Photostability

Crystals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 765 ◽  
Author(s):  
Qian Yang ◽  
Junyu Zou ◽  
Yannanqi Li ◽  
Shin-Tson Wu
Keyword(s):  
Liquid Crystal ◽  
Fast Response ◽  
Laser Wavelength ◽  
Blue Laser ◽  
Spatial Light Modulators ◽  
High Brightness ◽  
Light Modulators ◽  
Phase Modulators ◽  
Liquid Crystal On Silicon ◽  
Measured Response

We report a new mixture, which is modified from Merck TL-216, for liquid-crystal-on-silicon spatial light modulators (SLMs). To achieve 2π phase change at λ = 633 nm with 5 V operation voltage, the measured response time is about 3 ms at 50 °C. Meanwhile, our mixture exhibits no sign of photodegradation and even the total dosage has exceeded 400 MJ/cm2 at a blue laser wavelength λ = 465 nm. In comparison, E7 died at about 30 MJ/cm2. Widespread applications of this material for high brightness SLMs, near-eye displays, and head-up displays are foreseeable.

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