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Demonstration of orbital angular momentum channel healing using a Fabry‐Pérot cavity

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Opto-Electronic Advances 2018年第5期1卷 1-6页

作者： shibiao wei Dapeng Wang Jiao Lin Xiaocong Yuan Nanophotonics Research Centre Shenzhen Key Laboratory of Micro-Scale Optical Information Technology Shenzhen University Shenzhen 518060 China School of Engineering RMIT University Melbourne VIC 3000 Australia

Orbital angular momentum （OAM） mode division provides a promising solution to push past the already exhausted available degrees of freedom available in conventional optical communications. Nevertheless, the practical deploymentof OAM within a free-space optical （FSO） communications system is still hampered by a major challenge, namely that OAM-based FSO links are vulnerable to disturbances. Though several techniques, such as using various non-diffraction beams and multiple transmit–receive apertures, are proposed to alleviate the influence of disturbances, these techniquessignificantly reduce the performance with regard to combating single fading for spatial blockages of the laser beam byobstructions. In this work, we initially demonstrate that a Fabry-Pérot resonant cavity has the ability to implement OAM mode healing, even for a blocking percentage of over 50%. Consequently, the proposed method will expand the use ofOAM in the FSO secure communications and quantum encryption fields.

关键词： optical communication orbital angular momentum Fabry-Pérot cavity

How Do Water Filled Traffic Barriers Shake a Suspension Bridge?

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Fluid Dynamics & Materials Processing 2022年第3期18卷 591-608页

作者： Guanni Qu Tianai Yue Xiaoyu Zhang shibiao wei The Shipley School Bryn MawrUSA Tianjin Nankai High School TianjinChina Xi’an Gaoxin No.1 High School Xi’anChina

The present study stems from the realization that the general problem relating to the analysis of wind-induced vibrations in suspension bridges still requires significant *** railings,overhaul tracks,and deflectors are known to largely affect such ***,the influence of a row of water-filled traffic barriers on the response of a sample suspension bridge is investigated *** is shown that the existence of water barriers causes flow separation and non-negligible vortices with respect to the condition with no water *** vortex shedding frequency at the far end is around 41.30 Hz,relatively close to the real vibration *** is also shown how different incoming angles of attack can change the flow field around the bridge cross-section and the vortex detachment frequency.

关键词： Suspension bridge water filled traffic barriers computational fluid dynamics vortex shedding frequency attack angle vibration

Active sorting of orbital angular momentum states of light with a cascaded tunable resonator

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Light(Science & Applications) 2020年第1期9卷 1904-1913页

作者： shibiao wei Stuart K.Earl Jiao Lin Shan Shan Kou Xiao-Cong Yuan Nanophotonics Research Center Shenzhen Key Laboratory of Micro-Scale Optical Information TechnologyShenzhen UniversityShenzhen 518060China Department of Chemistry and Physics La Trobe Institute for Molecular Science(LIMS)La Trobe UniversityVictoria 3086Australia School of Engineering RMIT UniversityMelbourneVictoria 3001Australia School of Physics The University of MelbourneTin AlleyMelbourneVictoria 3010Australia

The orbital angular momentum(OAM)of light has been shown to be useful in diverse fields ranging from astronomy and optical trapping to optical communications and data ***,one of the primary impediments preventing such applications from widespread adoption is the lack of a straightforward and dynamic method to sort incident OAM states without altering the ***,we report a technique that can dynamically filter individual OAM states and preserve the incident OAM states for subsequent *** the working principle of this technique is based on resonance,the device operation is not limited to a particular *** states with different wavelengths can resonate in the resonator without any additional modulation other than changing the length of the ***,we are able to demonstrate a reconfigurable OAM sorter that is constructed by cascading such optical *** approach does not require specially designed components and is readily amenable to integration into potential applications.

关键词： resonator tunable momentum

All-optical logic gates based on hierarchical photonic crystal modulated photoluminescence of perovskite nanocrystals

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中国科学:技术科学英文版 2023年第9期66卷 2735-2742页

作者： WANG Yun ZHA YanFang YANG YunYi LIU CiHui DI YunSong CAO GuiYuan wei shibiao CHEN ZhiHui GAN ZhiXing Center for Future Optoelectronic Functional Materials School of Computer and Electronic InformationSchool of Artificial IntelligenceNanjing Normal UniversityNanjing 210023China Centre for Translational Atomaterials School of ScienceSwinburne University of TechnologyHawthorn VIC 3122Australia Nanophotonics Research Center Shenzhen Key Laboratory of Micro-Scale Optical Information TechnologyShenzhen UniversityShenzhen 518060China Key Laboratory of Advanced Transducers and Intelligent Control Systems Ministry of Education and Shanxi ProvinceCollege of Electronic Information and Optical EngineeringTaiyuan University of TechnologyTaiyuan 030024China

Halide perovskites exhibit high performance in all sorts of optoelectronic and photonic areas, suggesting their huge potential in integrated photonic devices. However, until now, all optical logic gates based on perovskites are still rarely explored, hindering the development of all-optical networks and computing. Herein, a new concept of all-optical logic gates is proposed based on the modulation of photoluminescence(PL) from perovskite nanocrystals(PNCs). A hierarchical photonic crystal(Hie PhC) is developed by self-assembling polystyrene(PS) and SiO2nanoparticles, which exhibit a higher PL enhancement than that of a monolayer PhC. Moreover, the light-controlled PL is realized by taking advantage of the high thermal response of the PL from PNCs/Hie PhC on polyethylene(PE) substrate, assisted by a graphene layer for light-heat conversion. Consequently, optical diode and triode are achieved based on the modulated PL, which exhibit contrast ratios(CR) of 24.7 and 74.0 dB, ***-optical logic gates, including “AND”, “OR” and “NOT”, are realized based on the optical diode and triode.

关键词： perovskite nanocrystals photonic crystals all-optical logic gates modulation of photoluminescence

Graphene metalens for particle nanotracking

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Photonics Research 2020年第8期8卷 1316-1322页

作者： XUEYAN LI shibiao wei GUIYUAN CAO HAN LIN YUEJIN ZHAO BAOHUA JIA Beijing Key Laboratory for Precision Optoelectronic Measurement Instrument and Technology School of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China Centre for Translational Atomaterials(CTAM) Swinburne University of TechnologyHawthornVIC 3122Australia The Australian Research Council(ARC)Industrial Transformation Training Centre in Surface Engineering for Advanced Materials(SEAM) Swinburne University of TechnologyHawthornVIC 3122Australia

Particle nanotracking(PNT)is highly desirable in lab-on-a-chip systems for flexible and convenient multiparameter *** ultrathin flat lens is the preferred imaging device in such a system,with the advantage of high focusing performance and ***,PNT using ultrathin flat lenses has not been demonstrated so far because PNT requires the clear knowledge of the relationship between the object and image in the imaging *** a relationship still remains elusive in ultrathin flat lens-based imaging systems because they operate based on diffraction rather than *** this paper,we experimentally reveal the imaging relationship of a graphene metalens using nanohole arrays with micrometer *** distance relationship between the object and image as well as the magnification ratio is acquired with nanometer *** measured imaging relationship agrees well with the theoretical prediction and is expected to be applicable to other ultrathin flat lenses based on the diffraction *** analyzing the high-resolution images from the graphene metalens using the imaging relationship,3D trajectories of particles with high position accuracy in PNT have been *** revealed imaging relationship for metalenses is essential in designing different types of integrated optical systems,including digital cameras,microfluidic devices,virtual reality devices,telescopes,and eyeglasses,and thus will find broad applications.

关键词： glasses particle spacing

Misalignment measurement of optical vortex beam in free space

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Chinese Optics Letters 2019年第9期17卷 27-32页

作者： Xin Yang shibiao wei Shanshan Kou Fei Yuan En Cheng Key Laboratory of Underwater Acoustic Comm unication and Marine Informa tion Technology Ministry of EducationXiamen UniversityXiamen 361005China Centre for Micro-Photonics Faculty of EngineeringScience and TechnologySwinburne University of TechnologyHawthornVIC 3122Australia Department of Chemistry and Physics La Trobe Institute for Molecular Science (LIMS)La Trobe UniversityMelbourneVIC 3086Australia

The misalignment of optical vortex(OV) beams, including transversal displacement and tilt, occurs in many situations, including on reflection or refraction at an interface between two different media and in propagation and tracking systems for optical communications. We propose a reliable method to determine and subsequently eliminate tilt and transversal displacement in an OV beam. An experimental setup was established to verify the proposed method, and the experimental results showed good agreement with those of the numerical *** the measured misalignments, the initial orbital angular momentum spectrum can be recovered in free space.

关键词： Misalignment measurement optical vortex free space

High tolerance detour-phase graphene-oxide flat lens

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Photonics Research 2021年第12期9卷 2454-2463页

作者： shibiao wei GUIYUAN CAO HAN LIN HAORAN MU WENBO LIU XIAOCONG YUAN MICHAEL SOMEKH BAOHUA JIA Nanophotonics Research Center Shenzhen Key Laboratory of Micro-Scale Optical Information TechnologyShenzhen UniversityShenzhen 518060China Centre for Translational Atomaterials Faculty of EngineeringScience and TechnologySwinburne University of TechnologyHawthornVIC 3122Australia The Australian Research Council(ARC)Industrial Transformation Training Centre in Surface Engineering for Advanced Materials(SEAM) Swinburne University of TechnologyHawthornVIC 3122Australia

Flat lenses thinner than a wavelength promise to replace conventional refractive lenses in miniaturized optical ***,Fresnel zone plate flat lens designs require dense annuli,which significantly challenges nanofabrication ***,we propose a new implementation of detour phase graphene flat lens with flexible annular number and *** graphene metalenses demonstrated that with a flexible selection of the line density and width,the metalenses can achieve the same focal length without significant *** will significantly weaken the requirement of the nanofabrication system which is important for the development of large-scale flat lenses in industry applications.

关键词： phase replace annular

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

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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 ***,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 *** a 3D waveguide device for an FM-MCF requires considering not only higher-order modes transmission,but also waveguide *** propose and demonstrate a 3D waveguide device fabricated by femtosecond laser direct writing for various spatial path separations in an *** 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 *** 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 *** 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 *** 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

Countermeasure against blinding attack for single-photon detectors in quantum key distribution

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Journal of Semiconductors 2024年第4期45卷 76-81页

作者： Lianjun Jiang Dongdong Li Yuqiang Fang Meisheng Zhao Ming Liu Zhilin Xie Yukang Zhao Yanlin Tang wei Jiang Houlin Fang Rui Ma Lei Cheng weifeng Yang Songtao Han shibiao Tang QuantumCTek Co. Ltd.Hefei 230088China Shandong Institute of Quantum Science and Technology Co. Ltd.Jinan 250101China QuantumCTek(Beijing)Co. Ltd.Beijing 100193China School of Cyber Science and Technology University of Science and Technology of ChinaHefei 230027China Anhui Armed Police Force Hefei 230026China School of Electrical Engineering and Automation Anhui UniversityHefei 230601China

Quantum key distribution(QKD),rooted in quantum mechanics,offers information-theoretic ***,practi-cal systems open security threats due to imperfections,notably bright-light blinding attacks targeting single-photon ***,we propose a concise,robust defense strategy for protecting single-photon detectors in QKD systems against blinding *** strategy uses a dual approach:detecting the bias current of the avalanche photodiode(APD)to defend against con-tinuous-wave blinding attacks,and monitoring the avalanche amplitude to protect against pulsed blinding *** integrat-ing these two branches,the proposed solution effectively identifies and mitigates a wide range of bright light injection attempts,significantly enhancing the resilience of QKD systems against various bright-light blinding *** method forti-fies the safeguards of quantum communications and offers a crucial contribution to the field of quantum information security.

关键词： quantum key distribution single photon detector blinding attack pulsed blinding attack countermeasure quan-tum communication