Seeing infrared optical vortex arrays with a nonlinear spiral phase filter

2019 ◽  
Vol 44 (9) ◽  
pp. 2298 ◽  
Author(s):  
Fei Lin ◽  
Xiaodong Qiu ◽  
Wuhong Zhang ◽  
Lixiang Chen
Keyword(s):  
Optical Vortex ◽  
Phase Filter ◽  
Spiral Phase

scholarly journals Image edge enhancement using Airy spiral phase filter

2016 ◽  
Vol 24 (22) ◽  
pp. 25258 ◽  
Author(s):  
Yi Zhou ◽  
Shaotong Feng ◽  
Shouping Nie ◽  
Jun Ma ◽  
Caojin Yuan
Keyword(s):  
Edge Enhancement ◽  
Phase Filter ◽  
Image Edge ◽  
Spiral Phase

Image edge enhancement for moving objects with a spiral phase filter

2013 ◽  
Author(s):  
Mingguang Shan ◽  
Shanshan Bao ◽  
Zhi Zhong ◽  
Bengong Hao ◽  
Chengquan An
Keyword(s):  
Moving Objects ◽  
Edge Enhancement ◽  
Phase Filter ◽  
Image Edge ◽  
Spiral Phase

Interference imaging with a spatial spiral phase filter

2005 ◽  
Author(s):  
Severin Fürhapter ◽  
Alexander Jesacher ◽  
Stefan Bernet ◽  
Monika Ritsch-Marte
Keyword(s):  
Phase Filter ◽  
Spiral Phase

GENERATION OF OPTICAL VORTEX BEAMS BY COMPACT STRUCTURES

2014 ◽  
Vol 02 (02) ◽  
pp. 1440013 ◽  
Author(s):  
M. Q. MEHMOOD ◽  
CHENG-WEI QIU ◽  
AARON DANNER ◽  
JINGHUA TENG
Keyword(s):  
Optical Vortex ◽  
Vortex Generators ◽  
Small Scale ◽  
Fundamental Physics ◽  
Subwavelength Apertures ◽  
Mode Converters ◽  
Different Types ◽  
Phase Plates ◽  
Computer Generated Holograms ◽  
Spiral Phase

Orbital angular momentum (OAM) has been an enthralling topic of research from fundamental physics to technological applications since its discovery in 1992. Many techniques have been developed to generate OAM such as using spiral phase plates (SPPs), computer-generated holograms (CGH) and cylindrical mode converters, etc. However, these methods are based on bulky optics that cause a major hindrance for their exploitation in the emerging area of micron-nanophotonics. Recently, generation of such helical beams by micron-sized structures has gained momentous interest to make their appliance possible at small scale. This paper recapitulates these endeavors of minuscule optical vortex generation. Five different types of compact optical vortex generators, i.e., downscaling of conventional OAM generators, plasmonic vortex lens (PVLs), metasurfaces, integrated OAM emitters and subwavelength apertures are brought under discussion.

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