Handedness control in polarization lattice fields by using spiral phase filters

2021 ◽  
Vol 119 (22) ◽  
pp. 221106
Author(s):  
Sushanta Kumar Pal ◽  
Gauri Arora ◽  
Ruchi ◽  
P. Senthilkumaran
Keyword(s):  
Spiral Phase

scholarly journals Formation of Inverse Energy Flux in the Case of Diffraction of Linearly Polarized Radiation by Conventional and Generalized Spiral Phase Plates

Photonics ◽  
2021 ◽  
Vol 8 (7) ◽  
pp. 283
Author(s):  
Andrey Ustinov ◽  
Svetlana Khonina ◽  
Alexey Porfirev
Keyword(s):  
Energy Flux ◽  
Poynting Vector ◽  
Numerical Study ◽  
Longitudinal Component ◽  
Light Fields ◽  
Linearly Polarized ◽  
Linearly Polarized Radiation ◽  
Phase Plates ◽  
Spiral Phase ◽  
Polarized Radiation

Recently, there has been increased interest in the shaping of light fields with an inverse energy flux to guide optically trapped nano- and microparticles towards a radiation source. To generate inverse energy flux, non-uniformly polarized laser beams, especially higher-order cylindrical vector beams, are widely used. Here, we demonstrate the use of conventional and so-called generalized spiral phase plates for the formation of light fields with an inverse energy flux when they are illuminated with linearly polarized radiation. We present an analytical and numerical study of the longitudinal and transverse components of the Poynting vector. The conditions for maximizing the negative value of the real part of the longitudinal component of the Poynting vector are obtained.

Magnetic resonance velocity imaging using a fast spiral phase contrast sequence

1994 ◽  
Vol 32 (4) ◽  
pp. 476-483 ◽  
Author(s):  
G. Bruce Pike ◽  
Craig H. Meyer ◽  
Thomas J. Brosnan ◽  
Norbert J. Pelc
Keyword(s):  
Magnetic Resonance ◽  
Phase Contrast ◽  
Velocity Imaging ◽  
Spiral Phase ◽  
Phase Contrast Sequence

scholarly journals Spin glass state and enhanced spiral phase in doped delafossite oxideCuCrO2

2016 ◽  
Vol 94 (2) ◽  
Author(s):  
Z. R. Yan ◽  
M. H. Qin ◽  
S. Dong ◽  
M. Zeng ◽  
X. B. Lu ◽  
...  
Keyword(s):  
Spin Glass ◽  
Spin Glass State ◽  
Glass State ◽  
Spiral Phase

Extending the Alvarez-Lens Concept to Arbitrary Optical Devices: Tunable Gratings, Lenses, and Spiral Phase Plates

2017 ◽  
Vol 7 (3) ◽  
pp. 320-325 ◽  
Author(s):  
Stefan F. Busch ◽  
Jan C. Balzer ◽  
George Bastian ◽  
Graham E. Town ◽  
Martin Koch
Keyword(s):  
Optical Devices ◽  
Phase Plates ◽  
Tunable Gratings ◽  
Spiral Phase
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