Generation of single-focus phase singularity by the annulus-quadrangle-element coded binary square spiral zone plates

Zang, Huaping; Miao, Zhuanglei; Wang, Mengguang; Fan, Qunchao; Wei, Lai; Wang, Chuanke; Zhou, Weimin; Hua, Yilei; Cao, Leifeng; Xue, Xiangfei; Guo, Haizhong

doi:10.1007/s11433-022-1923-0

Cited by 7 publications

(2 citation statements)

References 57 publications

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“…Optical tweezer [1] is a technique that utilizes the radiation pressure of a laser beam to move and control the dynamics of physical objects, such as small particles, atoms, viruses, and other living cells without harming them. This technique is a groundbreaking invention in the field of laser physics and was awarded the Nobel Prize in 2018 for its wide-ranging applications in fields such as biology and physics [2,3]. Along this direction, optical vortices with helical phase beams, which carry the new degree of freedom of orbital angular momentum, have attracted considerable interest in recent years due to their unique physical characteristics, including phase singularity, dark axial intensity distribution and intrinsic orbital angular momentum [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

The Generation of Equal-Intensity and Multi-Focus Optical Vortices by a Composite Spiral Zone Plate

Zang,

Li,

Zheng

et al. 2024

Photonics

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We propose a new vortex lens for producing multiple focused coaxial vortices with approximately equal intensities along the optical axis, termed equal-intensity multi-focus composite spiral zone plates (EMCSZPs). In this typical methodology, two concentric conventional spiral zone plates (SZPs) of different focal lengths were composited together and the alternate transparent and opaque zones were arranged with specific m-bonacci sequence. Based on the Fresnel–Kirchhoff diffraction theory, the focusing properties of the EMCSZPs were calculated in detail and the corresponding demonstration experiment was been carried out to verify our proposal. The investigations indicate that the EMCSZPs indeed exhibit superior performance, which accords well with our physical design. In addition, the topological charges (TCs) of the multi-focus vortices can be flexibly selected and controlled by optimizing the parameters of the zone plates. These findings which were demonstrated by the performed experiment may open new avenues towards improving the performance of biomedical imaging, quantum computation and optical manipulation.

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Section: Introductionmentioning

confidence: 99%

The Generation of Equal-Intensity and Multi-Focus Optical Vortices by a Composite Spiral Zone Plate

Zang,

Li,

Zheng

et al. 2024

Photonics

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“…According to our physical design, a series of randomly distributed annulus quadrangleshaped nanometer structure apertures are adopted to replace the abrupt structures of the ERZPs to realize the desired sinusoidal reflectance. Based on the Kirchhoff diffraction theory and convolution theorem, [44] the focusing performance of such optics has been analyzed theoretically and numerically. Relative to the multi-foci irradiance generated by the ERZPs, on the one hand, the new idea can generate OVs with controllable OAM, and on the other hand can suppress the unavoidable higher-order foci with a purity and high-resolution spectrum.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of single-focus phase singularity based on elliptical reflective annulus quadrangle-element coded spiral zone plates

et al. 2023

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Optical vortices generated by the conventional vortex lens are usually disturbed by the undesired higher order foci which may lead to additional artifacts and thus degrade contrast sensitivity. Herein, in this work, we propose an efficient methodology to combine the merit of elliptical reflective zone plates (ERZPs) and the advantage of spiral zone plates (SZPs) in establishing a specific single optical element, termed elliptical reflective annulus quadrangle-element coded spiral zone plates (ERAQSZPs) to generate single-focus phase singularity. Differing from the abrupt reflectance of the ERZPs, series of randomly distributed nanometer apertures are adopted to realize the sinusoidal reflectance. Typically, according to our physical design, the ERAQSZPs are fabricated on a bulk substrate, therefore, the new idea can significantly reduce the difficulty in the fabrication process. Based on the Kirchhoff diffraction theory and convolution theorem, the focusing performance of ERAQSZPs was calculated. The results reveal that, apart from the capability of generating optical vortices, ERAQSZPs can also integrate the function of focusing, energy selection, higher order foci elimination as well as high spectral resolution together. In addition, the focusing properties can be further improved by appropriately adjusting the parameters such as zone number and the size of the consisted primitives. These findings are expected to direct a new direction towards improving the performance of optical capture, x-ray fluorescence spectra, and forbidden transition.

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Single-shot phase retrieval for randomly fluctuated and obstructed vortex beams

Zhang,

Zhu,

et al. 2024

Sci. China Phys. Mech. Astron.

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Generation of single-focus phase singularity by the annulus-quadrangle-element coded binary square spiral zone plates

Cited by 7 publications

References 57 publications

The Generation of Equal-Intensity and Multi-Focus Optical Vortices by a Composite Spiral Zone Plate

The Generation of Equal-Intensity and Multi-Focus Optical Vortices by a Composite Spiral Zone Plate

Performance analysis of single-focus phase singularity based on elliptical reflective annulus quadrangle-element coded spiral zone plates

Single-shot phase retrieval for randomly fluctuated and obstructed vortex beams

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