Flower‐Shaped Optical Vortex Array

Fan, Haihao; Zhang, Hao; Cai, Chenyuan; Tang, Miaomiao; Li, Hehe; Tang, Jie; Li, Xinzhong

doi:10.1002/andp.202000575

Cited by 14 publications

(1 citation statement)

References 52 publications

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“…[9] The superposition of IGBs can produce complicated structured beams with multiple phase and polarization singularities, which have been applied in many fields ranging from cold atoms trapping [10] to quantum optics. [11] However, the current system for the IGB generation includes many bulky optical elements (e.g., Dove prism, SLMs, DMDs, pinhole filters, polarizers, lenses, and dichroic mirrors) and has a low resolution, [9,[12][13][14][15] increasing expense and making them impractical for applications where lightweight and compactness are needed. Moreover, problems such as inaccessible polarization control and precise alignment requirements also need to be solved.…”

Section: Introductionmentioning

confidence: 99%

Metasurface for Engineering Superimposed Ince‐Gaussian Beams

Ahmed,

Ansari,

Paterson

et al. 2024

Advanced Materials

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Ince‐Gaussian beams (IGBs) are the third complete family of exact and orthogonal solutions of the paraxial wave equation and have been applied in many fields ranging from particle trapping to quantum optics. IGBs play a very important role in optics as they represent the exact and continuous transition modes connecting Laguerre–Gaussian and Hermite‐Gaussian beams. The method currently in use suffers from the high cost, complexity, and large volume of the optical system. The superposition of IGBs can generate complicated structured beams with multiple phase and polarization singularities. We propose a metasurface approach to realizing various superpositions of IGBs without relying on a complicated optical setup. By superimposing IGBs with even and odd modes, multiple phase and polarization singularities are observed in the resultant beams. The phase and polarization singularities are modulated by setting the initial phase in the design and controlling the incident linear polarization. The compactness of the developed metasurface devices and the unique properties of the generated beams have the potential to impact many practical applications such as particle manipulation, orbital angular momentum spectrum manipulation and optical communications.This article is protected by copyright. All rights reserved

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Section: Introductionmentioning

confidence: 99%

Metasurface for Engineering Superimposed Ince‐Gaussian Beams

Ahmed,

Ansari,

Paterson

et al. 2024

Advanced Materials

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Manipulation and Improvement of Autofocusing Properties for Circular Butterfly Beams

Cai

Sun

et al. 2022

Annalen der Physik

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A new class of (2+1)‐dimensional circular butterfly beams (CBBs) is first demonstrated based on high‐dimensional butterfly catastrophes. The intensity of CBBs increases abruptly by two orders of magnitude right before they propagate to the focal plane, implying that they possess an abruptly autofocusing (AAF) ability induced by accelerating properties. The autofocusing performance can be further improved by introducing vortices. Owing to the flexibility of high‐dimensional catastrophes, butterfly beams exhibit diverse optical light structures; thus, the focal length, focal intensity, and light field structures of CBBs are tunable. Experimental results are consistent with numerical findings. Therefore, CBBs enrich the family of AAF beams and will be advantageous for optical micromachining, medical treatments, optical tweezers, and nonlinear processes.

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3D Engineering of Orbital Angular Momentum Beams via Liquid‐Crystal Geometric Phase

Liu

Chen

et al. 2022

Laser & Photonics Reviews

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Orbital angular momentum (OAM) provides a novel degree of freedom for light, deeply inspiring versatile light‐matter interactions and large‐density multiplexing computing. Recently, multimode and multichannel control of OAM beams have aroused extensive curiosity, whereas their flexible engineering in 3D space still remains challenging. Here, a new type of liquid‐crystal geometric phase optical elements is demonstrated to achieve on‐demand 3D tailoring of OAM beams. Via integrating binary and continuous phase patterns into photo‐aligned liquid crystals, customized 3D lattices of identical or propagation‐variant OAM beams are generated in an electrically tunable broadband manner. By altering the incident spin, these volumetric OAM beams can be switched among different states on the higher‐order Poincaré sphere. This work demonstrates a practical approach toward efficient OAM harnessing with large channel capacity and high spatial mode diversity, holding great potential for 3D optical manipulation, recording, and microscopy.

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Flower‐Shaped Optical Vortex Array

Cited by 14 publications

References 52 publications

Metasurface for Engineering Superimposed Ince‐Gaussian Beams

Metasurface for Engineering Superimposed Ince‐Gaussian Beams

Manipulation and Improvement of Autofocusing Properties for Circular Butterfly Beams

3D Engineering of Orbital Angular Momentum Beams via Liquid‐Crystal Geometric Phase

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