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Non-spreading Bessel spatiotemporal optical vortices

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Science Bulletin 2022年第2期67卷 133-140,M0003页

作者： Qian Cao Jian Chen Keyin Lu Chenhao Wan Andy Chong Qiwen Zhan School of optical-Electrical and Computer Engineering University of Shanghai for Science and TechnologyShanghai 200093China School of optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China Department of Physics University of DaytonDayton OH 45469USA Department of Electro-Optics and Photonics University of DaytonDayton OH 45469USA

Non-spreading nature of Bessel spatiotemporal wavepackets is theoretically and experimentally investigated and orders of magnitude improvement in the spatiotemporal spreading has been *** spatiotemporal confinement provided by the Bessel spatiotemporal wavepacket is further exploited to transport transverse orbital angular momentum through embedding spatiotemporal optical vortex into the Bessel spatiotemporal wavepacket, constructing a new type of wavepacket: Bessel spatiotemporal optical vortex. Both numerical and experimental results demonstrate that spatiotemporal vortex structure can be well maintained and confined through much longer propagation. High order spatiotemporal optical vortices can also be better confined in the spatiotemporal domain and prevented from further breaking up, overcoming a potential major obstacle for future applications of spatiotemporal vortex.

关键词： optical vortices Bessel spatiotemporal wavepacket Orbital angular momentum Spatiotemporal vortex

Propagation dynamics of ring Airy Gaussian beams with cosine modulated optical vortices

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Chinese Optics Letters 2018年第11期16卷 9-13页

作者： Feili Wang Cibo Lou Yi Liang Institute of Photonics Faculty of ScienceNingbo UniversityNingbo 315211China Guangxi Key Laboratory for Relativistic Astrophysics School of Physics Science and TechnologyGuangxi UniversityNanning 530004China Corresponding author：loucibo@*** corresponding author： liangyi@***

We numerically investigate the propagation properties of ring Airy Gaussian beams （RAGBs） with cosine modulated optical vortices （CMOV）. In comparison to the common RAGBs without any modulation, the dynamic propagation of RAGBs with CMOV exhibits a unique feature： the rings of RAGBs with CMOV will gradually shrink into several main lobes with the increase of the propagation distance. The number of lobes and the peak intensity of each lobe are determined by the factors of cosine modulated function. By designing the initial phase, we can easily change the transversal location of the peak intensity. Our results may find potential applications in optical manipulations.

关键词： Airy beams Modulation optical potentials optical vortices

Iso-propagation vortices with OAM-independent size and divergence toward future faster optical communications

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Advanced Photonics 2024年第3期6卷 51-59页

作者： Wenxiang Yan Zhaozhong Chen Xian Long Yuan Gao Zheng Yuan Zhi-Cheng Ren Xi-Lin Wang Jianping Ding Hui-Tian Wang Nanjing University School of PhysicsNational Laboratory of Solid State MicrostructuresNanjingChina Nanjing University Collaborative Innovation Center of Advanced MicrostructuresNanjingChina University of Glasgow James Watt School of EngineeringGlasgowUnited Kingdom Nanjing University Collaborative Innovation Center of Solid-State Lighting and Energy-Saving ElectronicsNanjingChina

Recognized in the 1990s,vortex beams'ability to carry orbital angular momentum(OAM)has significantly contributed to applications in optical manipulation and high-dimensional classical and quantum information ***,inherent diffraction in free space results in the inevitable expansion of beam size and divergence contingent upon the OAM,limiting vortex beams'applicability in areas such as spatial mode multiplexing communication,fiber-optic data transmission,and particle *** domains necessitate vortex beams with OAM-independent propagation *** introduce iso-propagation vortices(IPVs),vortex beams characterized by OAM-independent propagation behavior,achieved through precise radial index configuration of Laguerre-Gaussian *** display notable transmission dynamics,including a reduced quality factor,resilience post-damage,and decreased and uniform modal scattering under atmospheric *** distinctive attributes render IPVs valuable for potential applications in imaging,microscopy,optical communication,metrology,quantum information processing,and light-matter ***,within optical communication,the case study suggests that the IPV basis,due to its OAM-independent propagation behavior,provides access to a more extensive spectrum of data channels compared with conventional spatial multiplexing techniques,consequently augmenting information capacity.

关键词： orbital angular momentum optical communication structured light optical vortices

Propagation properties and radiation force of circular Airy Gaussian vortex beams in strongly nonlocal nonlinear medium

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Chinese Physics B 2021年第2期30卷 285-292页

作者： Xinyu Liu Chao Sun Dongmei Deng Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices South China Normal UniversityGuangzhou 510631China

We study the abruptly autofocusing and autodefocusing properties of the circular Airy Gaussian vortex(CAi GV)beams in strongly nonlocal nonlinear medium for the first time through numerical *** magnitude of topological charges and the position of the vortex could change not only the light spot pattern but also the intensity ***,we can change the position of the autofocusing and autodefocusing planes by changing the parameter of the incident ***,we can control the peak intensity contrast through choosing properly the truncation *** for the radiation force,we study the gradient and the scattering forces of CAi GV beams on Rayleigh dielectric *** analyses demonstrate that the radiation force can be enhanced by choosing proper parameters of CAi GV beams.

关键词： optical vortices abruptly autofocusing radiation force strongly nonlocal nonlinear

Propagation of optical vortex solitons due to the Gouy phase in strongly nonlocal nonlinear media

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Chinese Physics B 2011年第8期20卷 204-209页

作者：吴晓飞邓冬梅郭旗 Key Laboratory of Photonic Information Technology of Guangdong Higher Educaiton Institutes South China Normal University

In this paper, we present a study on the propagation of the symmetrical optical vortices formed by two collinear Laguerre-Gauss solitons in strongly nonlocal nonlinear media. The optical vortices, which move along the beam axis as the light propagates, result in a rotation of the beam＇s transverse profile. This physical reason of the rotation is the Gouy phase acquired by the component beams.

关键词： optical vortices Gouy phase strongly nonlocal nonlinear media

Superposition of orbital angular momentum of photons by a combined computer-generated hologram fabricated in silica glass with femtosecond laser pulses

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Chinese Physics B 2008年第11期17卷 4199-4203页

作者：郭忠义曲士良孙正和刘树田 Department of Physics Harbin Institute of Technology Department of Optoelectronic Science Harbin Institute of Technology at Weihai

This paper introduces a novel method to realize the superposition of orbital angular momentum of photons by combined computer-generated hologram （CCGH） fabricated in silica glass with femtosecond laser pulses. Firstly, the two computer-generated holograms （CGH） of optical vortex were obtained and combined as a CCGH according to the design. Then the CCGH was directly written inside glass by femtosecond laser pulses induced microexplosion without any preor post-treatment of the material. The vortex beams with different vortex topological charges （including new topological charges） have been restructured using a collimated He-Ne laser beam incidence to the CCGH normally. A theoretical and experimental explanation has been presented for the generations of the new topological charges.

关键词： femtosecond laser micro-structure optical vortices CGH

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

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Science China(Physics,Mechanics & Astronomy) 2022年第9期65卷 72-78页

作者： Huaping Zang Zhuanglei Miao Mengguang Wang Quanping Fan Lai Wei Chuanke Wang Weimin Zhou Yilei Hua Leifeng Cao Xinlian Xue Haizhong Guo Key Laboratory of Material Physics Ministry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450052China Science and Technology on Plasma Physics Laboratory Laser Fusion Research CenterChina Academy of Engineering PhysicsMianyang 621900China Laboratory of Microelectronic Devices and Integrated Technology Institute of MicroelectronicsChinese Academy of SciencesBeijing 100029China School of Engineering Physics Shenzhen Technology UniversityShenzhen 518118China Collaborative Innovation Center of Light Manipulations and Applications Shandong Normal UniversityJinan 250358China

optical vortices(OVs) with unique square symmetry are widely used in various applications including particle manipulation,microscopy, and image processing. However, the undesired higher-order foci introduced by the conventional vortex lens such as square spiral zone plates(SSZPs) may lead to additional artifacts and thus degrade contrast sensitivity. In this endeavor, herein,we propose a methodology to combine the merit of SSZPs and the advantage of Gabor zone plates(GZPs) in establishing a specific single optical element, termed binary single focused square spiral zone plates(BSSZPs). In contrast to the abrupt transitions of the SSZPs, our central idea aims to realize the sinusoidal transmittance along the radial direction of SSZPs by a series of randomly distributed annulus-quadrangle-shaped nanometer structure apertures. The innovative design can simultaneously generate OVs with unique square symmetry, and eliminate the interference of higher-order foci along the propagation direction. Guided by our theoretical predication, the focusing property of such optics was further experimentally *** findings are expected to direct new avenue towards improving the performance of optical image processing and alignment system.

关键词： optical vortices higher-order diffraction spiral zone plates topological charges

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Existence of optical Vortex Solitons in Pair Plasmas

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Acta Mathematicae Applicatae Sinica 2023年第3期39卷 571-582页

作者： Rui-feng ZHANG School of Mathematics and Statistics Henan UniversityKaifeng 475004China

optical vortices arise as phase dislocations of light fields and they are of importance in modern optical *** this study,we employ the calculus of variations method to develop an existence theory for the steady state vortex solutions of a nonlinear Schr?dinger type equation to model light waves that propagate in a medium with a new focusing-defocusing ***,we demonstrate the existence of positive radially symmetric solutions by constrained minimization,where we give some interesting explicit estimates related to vortex winding numbers and the wave propagation ***,we establish the existence of saddle-point solutions through a mountain-pass argument.

关键词： Calculus of variations mountain-pass theorem pair plasmas nonlinear Schr?dinger type equation optical vortices

Quantum digital spiral imaging

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Light(Science & Applications) 2014年第1期3卷 268-273页

作者： Lixiang Chen Jijin Lei Jacquiline Romero Department of Physics and Laboratory of Nanoscale Condensed Matter Physics Xiamen UniversityXiamen 361005China School of Physics and Astronomy University of GlasgowGlasgow G128QQUK

We demonstrate that the combination of digital spiral imaging with high-dimensional orbital angular momentum(OAM)entanglement can be used for efficiently probing and identifying pure phase objects,where the probing light does not necessarily touch the object,via the experimental,non-local decomposition of non-integer pure phase vortices in OAM-entangled photon *** entangled photons are generated by parametric downconversion and then measured with spatial light modulators and single-mode *** fractional phase vortices are defined in the idler photons,while their corresponding spiral spectra are obtained non-locally by scanning the measured OAM states in the signal *** conceptually illustrate our results with the biphoton Klyshko picture and the effective dimensionality to demonstrate the high-dimensional nature of the associated quantum OAM *** result is a proof of concept that quantum imaging techniques exploiting high-dimensional entanglement can potentially be used for remote sensing.

关键词： dimensionality Klyshko picture optical vortices orbital angular momentum quantum imaging