scholarly journals External pressure induced liquid crystal defects for optical vortex generation

AIP Advances ◽  
2018 ◽  
Vol 8 (6) ◽  
pp. 065219
Author(s):  
L. K. Migara ◽  
Heesu Lee ◽  
Cheon-Myeong Lee ◽  
Keumcheol Kwak ◽  
Doyeon Lee ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Optical Vortex ◽  
External Pressure ◽  
Crystal Defects ◽  
Vortex Generation

Arbitrary and reconfigurable optical vortex generation: a high-efficiency technique using director-varying liquid crystal fork gratings

2015 ◽  
Vol 3 (4) ◽  
pp. 133 ◽  
Author(s):  
Peng Chen ◽  
Bing-Yan Wei ◽  
Wei Ji ◽  
Shi-Jun Ge ◽  
Wei Hu ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
High Efficiency ◽  
Optical Vortex ◽  
Vortex Generation

Optical Vortex Generation in Nematic Liquid Crystal Light Valves

2013 ◽  
Vol 572 (1) ◽  
pp. 24-30 ◽  
Author(s):  
R. Barboza ◽  
U. Bortolozzo ◽  
G. Assanto ◽  
S. Residori
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Optical Vortex ◽  
Vortex Generation

Optical vortex generation by use of vector beam recorded azo-dye-doped liquid-crystal polymer composites

2017 ◽  
Author(s):  
Moritsugu Sakamoto ◽  
Tomoyuki Sasaki ◽  
Tran Minh Tien ◽  
Kohei Noda ◽  
Nobuhiro Kawatsuki ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Polymer Composites ◽  
Azo Dye ◽  
Optical Vortex ◽  
Liquid Crystal Polymer ◽  
Vortex Generation ◽  
Vector Beam ◽  
Crystal Polymer

High-order optical vortex generation in a few-mode fiber via cascaded acoustically driven vector mode conversion

2016 ◽  
Vol 41 (21) ◽  
pp. 5082 ◽  
Author(s):  
Wending Zhang ◽  
Ligang Huang ◽  
Keyan Wei ◽  
Peng Li ◽  
Biqiang Jiang ◽  
...  
Keyword(s):  
Mode Conversion ◽  
Optical Vortex ◽  
High Order ◽  
Vortex Generation ◽  
Vector Mode

Digitized subwavelength surface structure on silicon platform for wavelength-/polarization-/charge-diverse optical vortex generation

2020 ◽  
Author(s):  
Xiaoping Cao ◽  
Nan Zhou ◽  
Shuang Zheng ◽  
Shengqian Gao ◽  
Yuntao Zhu ◽  
...  
Keyword(s):  
Surface Structure ◽  
Optical Communications ◽  
Vortex Generator ◽  
Optical Vortex ◽  
Vortex Generation ◽  
Worst Case ◽  
Additional Degree ◽  
Direct Binary Search ◽  
Polarization Charge ◽  
Narrow Bandwidth

Abstract Optical vortices carrying orbital angular momentum (OAM) have recently attracted increasing interest for providing an additional degree of freedom for capacity scaling in optical communications. The optical vortex generator is an essential component to facilitate OAM-enabled optical communications. Traditional devices face challenges of limited compactness, narrow bandwidth and first-order OAM modes. Here, using the direct-binary search (DBS) optimization algorithm, we design, fabricate and demonstrate a digitized subwavelength surface structure on silicon platform for wavelength-/polarization-/charge-diverse optical vortex generation. It features an ultra-compact footprint (~3.6×3.6 μm 2 ) and ultra-wide bandwidth (1480-1630 nm), supporting two polarizations and high-order OAM modes (OAM +1 , OAM -1 , OAM +2 , OAM -2 ) with high purity of ~90%. The mode crosstalk matrix is measured in the experiment with favorable performance. When generating x-pol. OAM +1 , x-pol. OAM -1 , y-pol. OAM +1 and y-pol. OAM -1 , the crosstalk of the worst case is less than -14 dB. When generating OAM +1 , OAM -1 , OAM +2 and OAM -2 , the crosstalk between any two OAM modes is less than -10 dB, and the lowest crosstalk is about -17 dB. The wavelength-/polarization-/charge-diverse optical vortex generator enables the full access of multiple physical dimensions (wavelength, polarization, space) of lightwaves. The demonstrations may open up new perspectives for chip-scale solutions to multi-dimensional multiplexing optical communications.

Optical vortex generation from a diode-pumped alexandrite laser

2018 ◽  
Vol 15 (4) ◽  
pp. 045804 ◽  
Author(s):  
G M Thomas ◽  
A Minassian ◽  
M J Damzen
Keyword(s):  
Optical Vortex ◽  
Vortex Generation ◽  
Alexandrite Laser ◽  
Diode Pumped

scholarly journals Optical vortex induction via light–matter interaction in liquid-crystal media

2015 ◽  
Vol 7 (3) ◽  
pp. 635 ◽  
Author(s):  
R. Barboza ◽  
U. Bortolozzo ◽  
M. G. Clerc ◽  
S. Residori ◽  
E. Vidal-Henriquez
Keyword(s):  
Liquid Crystal ◽  
Optical Vortex ◽  
Matter Interaction ◽  
Light Matter Interaction

Control of topological liquid crystal defects in microstructured cells

2006 ◽  
Author(s):  
G. D'Alessandro ◽  
G.V. Prakash ◽  
M. Kaczmarek ◽  
A. Dyadyusha ◽  
J.J. Baumberg
Keyword(s):  
Liquid Crystal ◽  
Crystal Defects

scholarly journals Optical vortex solitary wave in a bounded nematic-liquid-crystal cell

2013 ◽  
Vol 87 (1) ◽  
Author(s):  
Antonmaria A. Minzoni ◽  
Luke W. Sciberras ◽  
Noel F. Smyth ◽  
Annette L. Worthy
Keyword(s):  
Liquid Crystal ◽  
Solitary Wave ◽  
Nematic Liquid Crystal ◽  
Optical Vortex ◽  
Liquid Crystal Cell ◽  
Crystal Cell
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