scholarly journals Fast-switchable, high diffraction-efficiency ferroelectric liquid crystal Fibonacci grating

2021 ◽  
Vol 29 (9) ◽  
pp. 13978
Author(s):  
Zhi-bo Sun ◽  
Zheng-nan Yuan ◽  
An Nikita ◽  
Hoi-sing Kwok ◽  
Abhishek K. Srivastava
Keyword(s):  
Liquid Crystal ◽  
Diffraction Efficiency ◽  
Ferroelectric Liquid Crystal ◽  
High Diffraction Efficiency ◽  
High Diffraction

Liquid-crystal-filled gratings with high diffraction efficiency

1996 ◽  
Vol 21 (14) ◽  
pp. 1081 ◽  
Author(s):  
Mary Lou Jepsen ◽  
Hendrik J. Gerritsen
Keyword(s):  
Liquid Crystal ◽  
Diffraction Efficiency ◽  
High Diffraction Efficiency ◽  
High Diffraction

scholarly journals Twisting Structures in Liquid Crystal Polarization Gratings and Lenses

Crystals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 243
Author(s):  
Shiyuan Zhang ◽  
Wan Chen ◽  
Yang Yu ◽  
Qidong Wang ◽  
Quanquan Mu ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Diffraction Efficiency ◽  
Bragg Diffraction ◽  
Phase Compensation ◽  
Research Directions ◽  
Broad Bandwidth ◽  
Polarization Gratings ◽  
Diffraction Angle ◽  
High Diffraction Efficiency ◽  
High Diffraction

Recently, diverse twisting structures have been discovered to be a potential approach to design liquid crystal polarization gratings and lenses (LCPGs and LCPLs) with a high diffraction efficiency, broad bandwidth, wide view, and large diffraction angle. In this review, we divide these twisting structures into two main types, namely, multi-layer twisting structures with phase compensation and twisting structures forming Bragg diffraction. We found that multi-layer twisting structure LCPGs and LCPLs presented a broader bandwidth and a wider view angle by phase compensation. While for transmissive or reflective Bragg LCPGs, a large diffraction angle with high diffraction efficiency could be achieved. Based on the theoretical analysis in the review, potential research directions on novel twisting structures were prospected.

scholarly journals Recent Advances in Photoalignment Liquid Crystal Polarization Gratings and Their Applications

Crystals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 900
Author(s):  
Tiegang Lin ◽  
Jin Xie ◽  
Yingjie Zhou ◽  
Yaqin Zhou ◽  
Yide Yuan ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Optical Anisotropy ◽  
Review Paper ◽  
Fabrication Process ◽  
Polarization Gratings ◽  
High Diffraction Efficiency ◽  
Physical Principles ◽  
High Diffraction ◽  
Exposure Methods ◽  
Beam Split

Liquid crystal (LC) circular polarization gratings (PGs), also known as Pancharatnam–Berry (PB) phase deflectors, are diffractive waveplates with linearly changed optical anisotropy axes. Due to the high diffraction efficiency, polarization selectivity character, and simple fabrication process, photoalignment LC PGs have been widely studied and developed especially in polarization management and beam split. In this review paper, we analyze the physical principles, show the exposure methods and fabrication process, and present relevant promising applications in photonics and imaging optics.

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