Two tailorable two-arms-cross patterns with equal intensity generated by a composite square zone plate

2020 ◽  
Vol 34 (05) ◽  
pp. 2050072
Author(s):  
Tian Xia ◽  
Shubo Cheng ◽  
Shaohua Tao
Keyword(s):  
Topological Charge ◽  
Construction Method ◽  
Zone Plate ◽  
Optical Vortices ◽  
Laser Alignment ◽  
Zone Plates ◽  
Potential Applications ◽  
Hollow Beams ◽  
Spiral Phase

A composite square zone plate (CSZP) is proposed to generate two two-arms-cross patterns with equal intensity and arbitrarily designed axial positions. Moreover, the CSZP with the spiral phase has two square optical vortices located at the arbitrary positions. In addition, we find that the same topological charge of twin square optical vortices for the CSZP follows a modulo-4 transmutation rule. The construction method of proposed zone plates is illustrated in detail. We prove numerically and experimentally that the CSZP and spiral-phase CSZP produce two tailorable two-arms-cross patterns with equal intensity and square optical vortices, respectively. The proposed zone plate can be used to generate hollow beams and have potential applications in infrared antennas and laser alignment systems.

A modified multiplexed vortex helico-conical petal-like zone plate

2021 ◽  
Author(s):  
Tian Xia ◽  
Shubo Cheng ◽  
Wenke Xie ◽  
Shaohua Tao
Keyword(s):  
Topological Charge ◽  
Zone Plate ◽  
Absolute Difference ◽  
Phase Plate ◽  
Rotation Direction ◽  
Clockwise Direction ◽  
Spiral Phase Plate ◽  
The Absolute ◽  
L1 And L2 ◽  
Spiral Phase

Abstract A modified multiplexed vortex helico-conical petal-like zone plate (MMVHPZP) is proposed to generate a polygon-like beam or light-arm beam with an adjustable opening. The MMVHPZP consists of the modified helico-conical petal-like zone plate (MHPZP) with the topological charge l and exponent n, and the multiplexed vortex spiral phase plate (MVSPP) with the inner topological charge l1 and outer topological charge l2. Moreover, when l1 is equal or unequal to l2, the MMVHPZP has the adjustable polygon-like beam or light-arm beam, respectively. In addition, when n is small or large, the number of arms is equal to the absolute difference between l1 and l2 or the sum of one and the absolute difference between l1 and l2, respectively. Furthermore, for the different l1 or l2, the opening is constant. With the increase of the n or l, the opening is larger. When l1 is greater or less than l2, the rotation direction of arms is the anticlockwise or clockwise direction, respectively.

scholarly journals Comparison of the focused optical vortices produced by high-aperture phase conventional and spiral zone plates

2021 ◽  
Vol 2103 (1) ◽  
pp. 012175
Author(s):  
A A Savelyeva ◽  
E S Kozlova ◽  
V V Kotlyar
Keyword(s):  
Gaussian Beam ◽  
Focal Plane ◽  
Topological Charge ◽  
Focal Spot ◽  
Zone Plate ◽  
Fdtd Simulation ◽  
Optical Vortices ◽  
Phase Zone ◽  
Linearly Polarized ◽  
Sharp Focusing

Abstract Using the FDTD simulation, sharp focusing of a linearly polarized Gaussian beam with an embedded topological charge m = 3 by a phase zone plate and focusing of a Gaussian beam by a phase spiral zone plate with topological charge m = 3 were studied. The obtained results showed that proposed elements formed different patterns of intensity at a focal plane. The spiral zone plate forms a focal spot with three petals. At a distance of 13.5 μm from the focus, the lobe structure of the intensity (and energy flux) is replaced by an annular distribution.

scholarly journals Generation of Perfect Optical Vortices by Using a Transmission Liquid Crystal Spatial Light Modulator

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Nelson Anaya Carvajal ◽  
Cristian H. Acevedo ◽  
Yezid Torres Moreno
Keyword(s):  
Liquid Crystal ◽  
Topological Charge ◽  
Spatial Light Modulator ◽  
Propagation Distance ◽  
Optical Vortex ◽  
Optical Vortices ◽  
Light Modulator ◽  
Intensity Pattern ◽  
Fourier Plane ◽  
Spiral Phase

We have experimentally created perfect optical vortices by the Fourier transformation of holographic masks with combination of axicons and spiral functions, which are displayed on a transmission liquid crystal spatial light modulator. We showed theoretically that the size of the annular vortex in the Fourier plane is independent of the spiral phase topological charge but it is dependent on the axicon. We also studied numerically and experimentally the free space diffraction of a perfect optical vortex after the Fourier back plane and we found that the size of the intensity pattern of a perfect optical vortex depends on the topological charge and the propagation distance.

A Spiral Phase Plate for an Optical Vortices Generation

2018 ◽  
pp. 1-43 ◽  
Author(s):  
V. V. Kotlyar ◽  
A. A. Kovalev ◽  
A. P. Porfirev
Keyword(s):  
Optical Vortices ◽  
Phase Plate ◽  
Spiral Phase Plate ◽  
Spiral Phase

scholarly journals Topological charge and angular momentum of light beams carrying optical vortices

2004 ◽  
Author(s):  
M S Soskin ◽  
V N Gorshkov ◽  
M V Vasnctsov ◽  
J T Malos ◽  
N R Heckenberg
Keyword(s):  
Angular Momentum ◽  
Topological Charge ◽  
Optical Vortices ◽  
Light Beams

Measuring the Topological Charge of Optical Vortices Using Elliptical Airy Phase Mask

2020 ◽  
Vol 32 (12) ◽  
pp. 741-744 ◽  
Author(s):  
Liqi Ding ◽  
Zhang Meng ◽  
Shaotong Feng ◽  
Shouping Nie ◽  
Jun Ma ◽  
...  
Keyword(s):  
Topological Charge ◽  
Phase Mask ◽  
Optical Vortices

scholarly journals Polarization-Independent Metasurface Lens Based on Binary Phase Fresnel Zone Plate

Nanomaterials ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1467
Author(s):  
Xing Li ◽  
Jing Tang ◽  
Jonathan Baine
Keyword(s):  
Fresnel Zone ◽  
Incident Light ◽  
Polarization State ◽  
Zone Plate ◽  
Visible Range ◽  
Fresnel Zone Plate ◽  
Binary Phase ◽  
Nanophotonic Devices ◽  
Potential Applications ◽  
Polarization Independent

Based on the binary phase Fresnel zone plate (FZP), a polarization-independent metasurface lens that is able to focus incident light with any polarization state, including circular, linear, and elliptical polarizations, has been proposed and investigated. We demonstrate that the metasurface lens consisting of metal subwavelength slits can operate in a wide bandwidth in the visible range, and has a higher focusing efficiency than that of an amplitude FZP lens without phase modulation. A multi-focus FZP metasurface lens has also been designed and investigated. The proposed lens can provide potential applications in integrated nanophotonic devices without polarization limitations.

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