Dual-type fractal spiral zone plate for generating sequence of square optical vortices

2019 ◽  
Vol 36 (5) ◽  
pp. 893 ◽  
Author(s):  
Jinghan Yang ◽  
Yinghui Zhong ◽  
Chenglong Zheng ◽  
Shuangling Ding ◽  
Huaping Zang ◽  
...  
Keyword(s):  
Zone Plate ◽  
Optical Vortices ◽  
Generating Sequence

Sequence of focused optical vortices generated by a spiral fractal zone plate

2006 ◽  
Vol 89 (3) ◽  
pp. 031105 ◽  
Author(s):  
S. H. Tao ◽  
X.-C. Yuan ◽  
J. Lin ◽  
R. E. Burge
Keyword(s):  
Zone Plate ◽  
Optical Vortices

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.

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 Investigation of the influence of amplitude spiral zone plate parameters on produced energy backflow

2019 ◽  
Vol 43 (6) ◽  
pp. 1093-1097
Author(s):  
E.S. Kozlova
Keyword(s):  
Time Domain ◽  
Finite Difference Time Domain ◽  
Energy Flow ◽  
Optical Axis ◽  
Longitudinal Component ◽  
Zone Plate ◽  
Optical Vortices ◽  
Relief Height ◽  
Vortex Beams ◽  
Difference Time

Investigation of the influence of parameters of silver, aluminum, gold, and chromium spiral zone plates on the longitudinal component of Umov-Pointing vector in produced optical vortices by using the frequency-dependent finite-difference time-domain method is presented. It is shown that the aluminum spiral zone plate with a relief height of 50 nm gives an optical vortex with the smallest longitudinal component of Umov-Pointing vector on the optical axis. The gold spiral zone plate is the least effective for the formation of vortex beams with a reverse energy flow.

A phase compensational elliptical Fresnel zone plate for generating elliptical optical vortices

2021 ◽  
pp. 127845
Author(s):  
Hangrui Liang ◽  
Ping Jiang ◽  
Huajun Yang ◽  
Weinan Caiyang ◽  
Yan Qin
Keyword(s):  
Fresnel Zone ◽  
Zone Plate ◽  
Optical Vortices ◽  
Fresnel Zone Plate

Square array of optical vortices generated by multiregion spiral square zone plate

2016 ◽  
Vol 33 (9) ◽  
pp. 1793 ◽  
Author(s):  
Arash Sabatyan ◽  
Seyyed Mojtaba Taheri Balanoji ◽  
Seyyed Mortaza Taheri Balanoji
Keyword(s):  
Zone Plate ◽  
Optical Vortices ◽  
Square Array

HIGH RESOLUTION X-RAY MICROSCOPY WITH ZONE PLATE MICROSCOPES

1984 ◽  
Vol 45 (C2) ◽  
pp. C2-77-C2-81 ◽  
Author(s):  
G. Schmahl ◽  
D. Rudolph ◽  
B. Niemann
Keyword(s):  
High Resolution ◽  
Zone Plate ◽  
X Ray

Temporal Zone Plate by Linear Chirp Generator

PIERS Online ◽  
2010 ◽  
Vol 6 (7) ◽  
pp. 655-658
Author(s):  
Carlos Gomez-Reino ◽  
Ana I. Gómez-Varela ◽  
Carmen Bao Varela ◽  
M. Teresa Flores-Arias
Keyword(s):  
Zone Plate ◽  
Linear Chirp

The Total Synthesis of Rhabdastrellic Acid A

2018 ◽  
Author(s):  
Yaroslav Boyko ◽  
Christopher Huck ◽  
David Sarlah
Keyword(s):  
Total Synthesis ◽  
Late Stage ◽  
Cross Coupling ◽  
Side Chains ◽  
General Strategy ◽  
Modular Approach ◽  
Linear Sequence ◽  
Generating Sequence ◽  
First Time

<div>The first total synthesis of rhabdastrellic acid A, a highly cytotoxic isomalabaricane triterpenoid, has been accomplished in a linear sequence of 14 steps from commercial geranylacetone. The prominently strained <i>trans-syn-trans</i>-perhydrobenz[<i>e</i>]indene core characteristic of the isomalabaricanes is efficiently accessed in a selective manner for the first time through a rapid, complexity-generating sequence incorporating a reductive radical polyene cyclization, an unprecedented oxidative Rautenstrauch cycloisomerization, and umpolung 𝛼-substitution of a <i>p</i>-toluenesulfonylhydrazone with in situ reductive transposition. A late-stage cross-coupling in concert with a modular approach to polyunsaturated side chains renders this a general strategy for the synthesis of numerous family members of these synthetically challenging and hitherto inaccessible marine triterpenoids.</div>

Sign in / Sign up

Export Citation Format

Share Document