检索结果-南通市图书馆

Optical orbital angular momentum multiplexing communication via inversely-designed multiphase plane light conversion

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Photonics Research 2022年第9期10卷 2015-2023页

作者： JUNCHENG FANG JINPEI LI ARU KONG YOUPENG xie CHUXUAN LIN zhenwei xie TING LEI XIAOCONG YUAN Nanophotonics Research Centre Shenzhen Key Laboratory of Micro-Scale Optical Information Technology&Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China

Multiplexing and demultiplexing of optical orbital angular momentum(OAM)are critical operations in modedivision multiplexing communications.Traditional Dammann gratings,spiral phase planes,and optical geometric transformations are regarded as convenient methods for OAM mode(de)multiplexing.However,crosstalk between the different modes and the difficulty of mode multiplexing greatly limit their application to modedivision multiplexing communications.Here,using a set of inversely-designed phase planes,we demonstrate an OAM(de)multiplexer based on multiphase plane light conversion that can enable perfect OAM multiplexing communication.The sorted patterns are Gaussian-like and can be coupled easily into single-mode fiber arrays.Inputs from the fiber array are turned into coaxial OAM modes after the phase planes.OAM mode crosstalk generated by the multiplexer is less than-20 d B,with insertion loss of less than 2.6 d B.OAM modes are sorted by the demultiplexer with mode crosstalk below-10 d B,and the sorting results are coupled to the fiber array.OAM modes carrying 10 Gbit/s on–off keying signals were transmitted in a 5 km few-mode fiber.The measured bit-error-rate curves have power penalties of less than 10 d B.The proposed configuration is highly efficient and convenient and will be beneficial for potential applications in quantum information,information processing,and optical communications.

关键词： multiplexing fiber communication

Optical topologicallattices of Bloch-type skyrmion and meron topologies

在线全文

学校读者我要写书评

暂无评论

Photonics Research 2022年第4期10卷 947-957页

作者： Qiang Zhang zhenwei xie Peng Shi Hui Yang Hairong He Luping Du Xiaocong Yuan Nanophotonics Research Center Shenzhen Key Laboratory of Micro-Scale Optical Information Technology&Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China

Optical skyrmions, quasiparticles that are characterized by the topologically nontrivial vectorial textures of optical parameters such as the electromagnetic field, Stokes parameters, and spin angular momentum, have aroused great attention recently. New dimensions for optical information processing, transfer, and storage have become possible, and developing multiple schemes for manipulating the topological states of skyrmions, thus, is urgent.Here we propose an approach toward achieving dynamic modulation of skyrmions via changing the field symmetry and adding chirality. We demonstrate that field symmetry governs the skyrmionic transformation between skyrmions and merons, whereas material chirality modulates the twist degree of fields and spins and takes control of the Néel-type–Bloch-type skyrmionic transition. Remarkably, the enantioselective twist of skyrmions and merons results from the longitudinal spin arising from the chirality-induced splitting of the hyperboloid in the momentum space. Our investigation, therefore, acts to enrich the portfolio of optical quasiparticles. The chiral route to topological state transitions will deepen our understanding of light–matter interaction and pave the way for chiral sensing, optical tweezers, and topological phase transitions in quantum matter.

关键词： topological nontrivial Bloch

Nondiffractive polarization feature of optical vortices

在线全文

学校读者我要写书评

暂无评论

先进光子学(英文) 2023年第3期5卷 27-28页

作者： zhenwei xie Shenzhen University Institute of Microscale Optoelectronics&State Key Laboratory of Radio Frequency Heterogeneous IntegrationNanophotonics Research CentreShenzhenChina

Optical vortices have been extensively researched in recent years for applications in optical manipulation,orbital angular momentum,opti-cal mode multiplexing,and quantum information.1 When the polariza-tions(spin angular momentum)encounter the phase singularity(orbital angular momentum)of an optical vortex,spin-orbit interaction occurs,leading to the discovery of even more fascinating features such as op-tical skyrmions 2 and polarization robustness.3 Optical vortices are like a rich goldmine with many more fascinating features yet to be revealed.

关键词： momentum orbital angular

Optical vortices 30 years on:OAM manipulation from topological charge to multiple singularities

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2019年第1期8卷 339-367页

作者： Yijie Shen Xuejiao Wang zhenwei xie Changjun Min Xing Fu Qiang Liu Mali Gong Xiaocong Yuan Key Laboratory of Photonic Control Technology(Tsinghua University) Ministry of Education100084 BeijingChina State Key Laboratory of Precision Measurement Technology and Instruments Department of Precision InstrumentTsinghua University100084 BeijingChina National Engineering Laboratory for Public Safety Risk Perception and Control by Big Data(NELPSRPC) China Academy of Electronics and Information Technology of CETCChina Electronic Technology Group Corporation100041 BeijingChina Nanophotonics Research Center Shenzhen University518060 ShenzhenChina

Thirty years ago,Coullet et al.proposed that a special optical field exists in laser cavities bearing some analogy with the superfluid vortex.Since then,optical vortices have been widely studied,inspired by the hydrodynamics sharing similar mathematics.Akin to a fluid vortex with a central flow singularity,an optical vortex beam has a phase singularity with a certain topological charge,giving rise to a hollow intensity distribution.Such a beam with helical phase fronts and orbital angular momentum reveals a subtle connection between macroscopic physical optics and microscopic quantum optics.These amazing properties provide a new understanding of a wide range of optical and physical phenomena,including twisting photons,spin–orbital interactions,Bose-Einstein condensates,etc.,while the associated technologies for manipulating optical vortices have become increasingly tunable and flexible.Hitherto,owing to these salient properties and optical manipulation technologies,tunable vortex beams have engendered tremendous advanced applications such as optical tweezers,high-order quantum entanglement,and nonlinear optics.This article reviews the recent progress in tunable vortex technologies along with their advanced applications.

关键词： tunable optics charge

Angular momentum holography via a minimalist metasurface for optical nested encryption

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Light(Science & Applications) 2023年第4期12卷 646-656页

作者： Hui Yang Peng He Kai Ou Yueqiang Hu Yuting Jiang Xiangnian Ou Honghui Jia zhenwei xie Xiaocong Yuan Huigao Duan National Research Center for High-Efficiency Grinding College of Mechanical and Vehicle EngineeringHunan UniversityChangsha 410082China Nanophotonics Research Center Shenzhen Key Laboratory of Micro-scale Optical Information TechnologyInstitute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060GuangdongChina Institute of Precision Optical Engineering School of Physics Science and EngineeringTongji UniversityShanghai 200092China Greater Bay Area Institute for Innovation Hunan UniversityGuangzhou 511300Guangdong ProvinceChina

Metasurfaces can perform high-performance multi-functional integration by manipulating the abundant physical dimensions of light,demonstrating great potential in high-capacity information technologies.The orbital angular momentum(OAM)and spin angular momentum(SAM)dimensions have been respectively explored as the independent carrier for information multiplexing.However,fully managing these two intrinsic properties in information multiplexing remains elusive.Here,we propose the concept of angular momentum(AM)holography which can fully synergize these two fundamental dimensions to act as the information carrier,via a single-layer,non-interleaved metasurface.The underlying mechanism relies on independently controlling the two spin eigenstates and arbitrary overlaying them in each operation channel,thereby spatially modulating the resulting waveform at will.As a proof of concept,we demonstrate an AM meta-hologram allowing the reconstruction of two sets of holographic images,i.e.,the spin-orbital locked and the spin-superimposed ones.Remarkably,leveraging the designed dual-functional AM meta-hologram,we demonstrate a novel optical nested encryption scheme,which is able to achieve parallel information transmission with ultra-high capacity and security.Our work opens a new avenue for optionally manipulating the AM,holding promising applications in the fields of optical communication,information security and quantum science.

关键词： momentum dimensions orbital

All-dielectric metasurface for fully resolving arbitrary beams on a higher-order Poincaré sphere

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Photonics Research 2021年第3期9卷 331-343页

作者： Hui Yang zhenwei xie Guanhai Li Kai Ou Feilong Yu Hairong He Hong Wang Xiaocong Yuan Nanophotonics Research Center Shenzhen Key Laboratory of Microscale Optical Information TechnologyInstitute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China School of Electrical and Electronic Engineering Nanyang Technological UniversitySingapore 639798Singapore National Laboratory for Infrared Physics Shanghai Institute of Technical PhysicsChinese Academy of SciencesShanghai 200083China

Characterizing the amplitude, phase profile, and polarization of optical beams is critical in modern optics. With a series of cascaded optical components, one can accurately resolve the optical singularity and polarization state in traditional polarimetry systems. However, complicated optical setups and bulky configurations inevitably hinder future applications for integration. Here, we demonstrate a metadevice that fully resolves arbitrary beams on a higher-order Poincaré sphere(HOPS) via a single-layer all-silicon metasurface. The device is compact and capable of detecting optical singularities and higher-order Stokes parameters simultaneously through a single intensity measurement. To verify the validity of the proposed metadevice, different beams on HOPS0,0 and HOPS1,-1 are illuminated on the metadevices. The beams are fully resolved, and the reconstructed higher-order Stokes parameters show good agreement with the original ones. Taking the signal-to-noise ratio into account, the numerical simulations indicate that the design strategy can be extended to fully resolve arbitrary beams on HOPS with order up to 4. Because of the advantages of compact configuration and compatibility with current semiconductor technology, the metadevice will facilitate potential applications in information processing and optical communications.

关键词： Poincaré arbitrary singularity

3D waveguide device for few-mode multi-core fiber optical communications

在线全文

学校读者我要写书评

暂无评论

Photonics Research 2022年第12期10卷 2677-2685页

作者： JUNCHENG FANG JINGBO HU YANAN ZHONG ARU KONG JIANXIN REN SHIBIAO WEI zhenwei xie TING LEI BO LIU XIAOCONG YUAN Nanophotonics Research Centre Shenzhen Key Laboratory of Micro-Scale Optical Information Technology&Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China Institute of Optoelectronics Nanjing University of Information Science&TechnologyNanjing 210044China

Space-division multiplexing based on few-mode multi-core fiber(FM-MCF)technology is expected to break the Shannon limit of a single-mode fiber.However,an FM-MCF is compact,and it is difficult to couple the beam to each fiber core.3D waveguide devices have the advantages of low insertion loss and low cross talk in separating various spatial paths of multi-core fibers.Designing a 3D waveguide device for an FM-MCF requires considering not only higher-order modes transmission,but also waveguide bending.We propose and demonstrate a 3D waveguide device fabricated by femtosecond laser direct writing for various spatial path separations in an FM-MCF.The 3D waveguide device couples the LP01 and LP11a modes to the FM-MCF with an insertion loss below 3 dB and cross talk between waveguides below-36 dB.To test the performance of the 3D waveguide device,we demonstrate four-channel multiplexing communication with two LP modes and two cores in a 1-km few-mode sevencore fiber.The bit error rate curves show that the different degrees of bending of the waveguides result in a difference of approximately 1 dB in the power penalty.Femtosecond laser direct writing fabrication enables 3D waveguide devices to support high-order LP modes transmission and further improves FM-MCF communication.

关键词： waveguide fiber mode

Diffractive optical elements 75 years on:from micro-optics to metasurfaces

在线全文

学校读者我要写书评

暂无评论

Photonics Insights 2023年第4期2卷 43-101页

作者： Qiang Zhang Zehao He zhenwei xie Qiaofeng Tan Yunlong Sheng Guofan Jin Liangcai Cao Xiaocong Yuan Nanophotonics Research Center Institute of Microscale Optoelectronics&State Key Laboratory of Radio Frequency Heterogeneous IntegrationShenzhen UniversityShenzhenChina Department of Precision Instruments Tsinghua UniversityBeijingChina Center for Optics Photonics and LasersLaval UniversityQuebecCanada Research Institute of Intelligent Sensing Research Center for Humanoid SensingZhejiang LabHangzhouChina

Diffractive optical elements(DOEs)are intricately designed devices with the purpose of manipulating light fields by precisely modifying their wavefronts.The concept of DOEs has its origins dating back to 1948 when D.Gabor first introduced holography.Subsequently,researchers introduced binary optical elements(BOEs),including computer-generated holograms(CGHs),as a distinct category within the realm of DOEs.This was the first revolution in optical devices.The next major breakthrough in light field manipulation occurred during the early 21st century,marked by the advent of metamaterials and metasurfaces.Metasurfaces are particularly appealing due to their ultra-thin,ultra-compact properties and their capacity to exert precise control over virtually every aspect of light fields,including amplitude,phase,polarization,wavelength/frequency,angular momentum,etc.The advancement of light field manipulation with micro/nano-structures has also enabled various applications in fields such as information acquisition,transmission,storage,processing,and display.In this review,we cover the fundamental science,cutting-edge technologies,and wide-ranging applications associated with micro/nano-scale optical devices for regulating light fields.We also delve into the prevailing challenges in the pursuit of developing viable technology for real-world applications.Furthermore,we offer insights into potential future research trends and directions within the realm of light field manipulation.

关键词： diffractive optical elements metasurfaces metamaterials

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

含砷含镍高酸硫酸铜结晶母液的综合利用

有色金属（冶炼部分） 2024年第6期 114-121页

作者：罗钊荣戴贞洧张飞谢太李江西铜业股份有限公司贵溪冶炼厂江西贵溪335424

针对硫酸铜结晶母液含砷、含镍、高酸的特点,根据正交试验法,采用pH调控法依次进行中和、沉铜、沉镍工业试验,探究了反应时间和终点pH对分离效果的影响。结果表明,采用液碱调控母液pH能有效回收铜、砷、镍元素。中和反应最佳参数为:终点... 详细信息

针对硫酸铜结晶母液含砷、含镍、高酸的特点,根据正交试验法,采用pH调控法依次进行中和、沉铜、沉镍工业试验,探究了反应时间和终点pH对分离效果的影响。结果表明,采用液碱调控母液pH能有效回收铜、砷、镍元素。中和反应最佳参数为:终点pH=2.5~3.0、反应时间1.5 h、反应自然升温,能够以铜砷渣形式回收98%以上的砷,并与镍成功分离;沉铜反应终点pH=6.0~6.5、反应时间1.0 h、反应温度80~90℃,能实现铜沉淀率>93%;沉镍反应终点pH=10.0~10.5、反应时间2.0 h,在室温下压滤,镍沉淀率>98%。母液经处理后得到的沉镍后液含铜96%,砷回收率>98%,镍回收率>84%。

关键词：硫酸铜结晶母液含砷废水含镍废水镍回收废水资源回收