Optimal phase steps of multi-level spiral phase plates

2006 ◽  
Vol 268 (2) ◽  
pp. 235-239 ◽  
Author(s):  
Cheng-Shan Guo ◽  
Dong-Mei Xue ◽  
Yu-Jing Han ◽  
Jianping Ding
Keyword(s):  
Phase Plates ◽  
Multi Level ◽  
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.

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

Generation of vector beams by Sagnac interferometer and spiral phase plates

2017 ◽  
Vol 46 (2) ◽  
pp. 217001
Author(s):  
辛璟焘 Xin Jingtao ◽  
李 凯 Li Kai ◽  
张 雯 Zhang Wen ◽  
娄小平 Lou Xiaoping ◽  
祝连庆 Zhu Lianqing
Keyword(s):  
Sagnac Interferometer ◽  
Vector Beams ◽  
Phase Plates ◽  
Spiral Phase

scholarly journals Evaluation of the Laguerre–Gaussian mode purity produced by three-dimensional-printed microwave spiral phase plates

2020 ◽  
Vol 7 (7) ◽  
pp. 200493
Author(s):  
D. Isakov ◽  
Y. Wu ◽  
B. Allen ◽  
P. S. Grant ◽  
C. J. Stevens ◽  
...  
Keyword(s):  
Computer Aided Design ◽  
Electromagnetic Waves ◽  
Three Dimensional ◽  
Direct Fabrication ◽  
Dielectric Lens ◽  
Gaussian Mode ◽  
Phase Plates ◽  
Mode Purity ◽  
Aided Design ◽  
Spiral Phase

Computer-aided design software and additive manufacturing provide flexibility for the direct fabrication of multi-material devices. This design and fabrication versatility has been investigated for the manufacture of dielectric spiral phase plates (SPP) that generate electromagnetic waves with helical wavefronts. Three types of SPPs designed to produce an orbital angular momentum (OAM) mode number l = |1| were additively manufactured using material extrusion and polyjet fabrication methods. The OAM mode characteristics of the transformed helical microwaves as a function of the SPP geometrical features were investigated experimentally in the 12–18 GHz frequency range. The SPPs were further combined with an additively manufactured dielectric lens that provided a marked improvement in OAM mode purity. Finally, multiplexing and de-multiplexing of two OAM modes were demonstrated successfully using an optimum SPP geometry and arrangement.

Generation of high-order Laguerre–Gaussian modes by means of spiral phase plates

2014 ◽  
Vol 39 (17) ◽  
pp. 5094 ◽  
Author(s):  
G. Ruffato ◽  
M. Massari ◽  
F. Romanato
Keyword(s):  
High Order ◽  
Phase Plates ◽  
Spiral Phase

Generation of optical vortices by using spiral phase plates made of polarization dependent devices

2014 ◽  
Vol 39 (7) ◽  
pp. 1984 ◽  
Author(s):  
Jingtao Xin ◽  
Kunjian Dai ◽  
Lei Zhong ◽  
Quanxin Na ◽  
Chunqing Gao
Keyword(s):  
Optical Vortices ◽  
Phase Plates ◽  
Spiral Phase
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