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2023 Advanced Fiber Laser Conference, AFL 2023

作者： Niu, Bin Zheng, Xiaodong Jing, Xu Qian, Cheng Li, Yufu Kong, Yuechan Chen, Tangsheng Lu, Liangliang National Key Laboratory of Solid-State Microwave Devices and Circuits Nanjing Electronic Devices Institute Nanjing210016 China Full Key Laboratory of Optoelectronic Technology of Jiangsu Province School of Physical Science and Technology Nanjing Normal University Nanjing210023 China

ISBN: (纸本)9781510677661

One of the key challenges for realizing large-scale quantum communication in installed fiber networks is to establish communication links between multiple users in a scalable and robust way. Quantum networks based on DWDM quantum correlation utilizing broadband entangled photon pair source could be the solution. Among many integrated photon source techniques, AlGaAs Bragg reflection waveguid (BRW), with its extremely high material χ(2) and negligible birefringence, can produce high brightness, wide bandwidth, post selection free polarization entangled photon pairs. In a scenario of entangled photon and classical light co-fiber transmitting, noise from the classical light could degrade the entanglement. In this paper. we designed and fabricated a Bragg reflection waveguide (BRW) AlGaAs/GaAs chip with high modal overlap to directly generate broadband polarization entanglement, and employed for demonstrate a fully connected three-user noisy network by multiplexing 3 pairings of DWMD channels, each pairing established a quantum communication link between any possible two users. Several causes of noise from chip fluorescence to co-fiber classical light, and their impacts on bit error rate (BER) were analyzed. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

关键词： Aluminum gallium arsenide

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Muscle-inspired soft robots based on bilateral dielectric elastomer actuators

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Microsystems & Nanoengineering 2023年第5期9卷 245-254页

作者： Yale Yang Dengfeng Li Yanhua Sun Mengge Wu Jingyou Su Ying Li Xinge Yu Lu Li Junsheng Yu State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Science and EngineeringUniversity of Electronic Science and Technology of China(UESTC)ChengduPR China Chongqing Key Laboratory of Materials Surface&Interface Science Chongqing Co-Innovation Center for Micro/Nano Optoelectronic Materials and DevicesMicro/Nano Optoelectronic Materials and Devices International Science and Technology Cooperation Base of ChinaSchool of Materials Science and EngineeringChongqing University of Arts and SciencesChongqingPR China Hong Kong Centre for Cerebro-Cardiovascular Health Engineering(COCHE) Hong KongSARChina Department of Biomedical Engineering City University of Hong KongHong KongSARChina

Muscle groups perform their functions in the human body via bilateral muscle actuation,which brings bionic inspiration to artificial robot *** soft robotic systems with artificial muscles and multiple control dimensions could be an effective means to develop highly controllable soft ***,we report a bilateral actuator with a bilateral deformation function similar to that of a muscle group that can be used for soft *** construct this bilateral actuator,a low-cost VHB 4910 dielectric elastomer was selected as the artificial muscle,and polymer films manufactured with specific shapes served as the actuator *** end-to-end connecting these bilateral actuators,a gear-shaped 3D soft robot with diverse motion capabilities could be developed,benefiting from adjustable actuation *** on the ground with all feet on the ground,a crawling soft robot with dexterous movement along multiple directions was ***,the directional steering was instantaneous and *** two feet standing on the ground,it also acted as a rolling soft robot that can achieve bidirectional rolling motion and climbing motion on a 2°***,inspired by the orbicularis oris muscle in the mouth,a mouthlike soft robot that could bite and grab objects 5.3 times of its body weight was *** bidirectional function of a single actuator and the various combination modes among multiple actuators together allow the soft robots to exhibit diverse functionalities and flexibility,which provides a very valuable reference for the design of highly controllable soft robots.

关键词： robot artificial dielectric

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Influence of sub-bandgap illumination on space charge distribution in CdZnTe detector

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Chinese Physics B 2021年第3期30卷 378-385页

作者： Rongrong Guo Jinhai Lin Lili Liu Shiwei Li Chen Wang Feibin Xiong Haijun Lin Fujian Provincial Key Laboratory of Optoelectronic Technology and Devices Xiamen University of TechnologyXiamen 361024China

The space charge accumulation in CdZnTe crystals seriously affects the performance of high-flux pulse *** influence of sub-bandgap illumination on the space charge distribution and device performance in CdZnTe crystals were studied theoretically by Silvaco TCAD software *** sub-bandgap illumination with a wavelength of 890 nm and intensity of 8×10−8 W/cm2 were used in the simulation to explore the space charge distribution and internal electric field distribution in CdZnTe *** simulation results show that the deep level occupation faction is manipulated by the sub-bandgap illumination,thus space charge concentration can be reduced under the bias voltage of 500 V.A flat electric field distribution is obtained,which significantly improves the charge collection efficiency of the CdZnTe ***,premised on the high resistivity of CdZnTe crystal,the space charge concentration in the crystal can be further reduced with the wavelength of 850 nm and intensity of 1×10−7 W/cm2 *** electric field distribution is flatter and the carrier collection efficiency of the device can be improved more effectively.

关键词： CdZnTe detector sub-bandgap illumination space charge charge collection efficiency

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Two-dimensional selenium and its composites for device applications

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Nano Research 2022年第1期15卷 104-122页

作者： Zhe Shi Hongqiao Zhang Karim Khan Rui Cao Kaikai Xu Han Zhang School of Physics&New Energy Xuzhou University of TechnologyXuzhou 221018China Shenzhen Engineering Laboratory of phosphorene and Optoelectronics Collaborative Innovation Center for Optoelectronic Science and Technology and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceShenzhen UniversityShenzhen 518060China State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of ChinaChengdu 610054China

Two-dimensional(2D)selenium was synthesized successfully in *** advanced properties,including size-dependent bandgap,excellent environmental robustness,strong photoluminescence effect,anisotropic thermal conductivity,and high photoconductivity,render it and selenium-based composites a promising candidate for various device *** include batteries,modulators,photodetectors,and photothermal effects in medical ***,compared to other commonly used 2D materials,such as graphene,transition metal dichalcogenides,and black phosphorus,2D Se is much less *** by the need to overcome this lack of knowledge,this article focuses on recent progress and elucidates the crystal structure,synthesis methods,physical properties,applications,challenges,and prospects of 2D Se nanoflakes.

关键词： two-dimensional materials selenium batteries photodetectors photothermal effect

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Synergistic fibrillization engineering in donor and acceptor phases enables high-performance all-polymer solar cells

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Nano Research 2025年第4期18卷 219-227页

作者： Bin Zhang Yushou Zhao Xiaofeng Qin Aiqin Li Xinling Li Wenming Li Weile Guo Xiaolan Qin Zhicai He Yong Hua Menglan Lv Liming Ding Engineering Research Center for Energy Conversion and Storage Technology of Guizhou School of Chemistry and Chemical EngineeringGuizhou UniversityGuiyang 550025China School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006China Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and DevicesSouth China University of TechnologyGuangzhou 510640China School of Materials and Energy Yunnan UniversityKunming 650091China

Recently,all-polymer solar cells(all-PSCs)have become an important organic photovoltaic technology,ascribing to their unique characteristics of high stability and mechanical ***,the morphology control between polymer donor and polymer acceptor suffers from tough difficulties,resulting from the nature of rigid planarity and chain entanglement in the conjugated polymer *** this work,we utilize an additive,1-chloro-naphthalene(CN),to regulate polymer chain stacking and orientation in D18:PY-IT system,resulting in the formation of versatile nano-scale polymer fibrillization between donor and acceptor ***,the CN-modified D18:PY-IT blend film shows improved molecular stacking characteristics and distinct nano-scale bi-continuous phase *** to the incorporation of CN additive in a bulk-heterojunction(BHJ)D18:PY-IT system,it exhibits higher photovoltaic performance than the as-cast and only thermal annealing(TA)treated devices,where the CN-based device provides a power conversion efficiency(PCE)of 17.31%,an open-circuit voltage(VOC)of 0.955 V,a short-circuit current density(JSC)of 24.16 mA·cm^(-2),and a fill factor(FF)of 74.99%,*** is one of the highest photovoltaic performances reported in the D18:PY-IT based binary BHJ ***,it is evident that the morphology in all-PSCs can be feasibly modulated via incorporating appropriate additive into active layer for achieving excellent photovoltaic performance.

关键词： fibrillization engineering morphology control additive 1-chloro-naphthalene all-polymer solar cells

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Steering S-scheme charge transfer via interfacial dipoles induced by amine-containing polyelectrolytes

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Science China Chemistry 2023年第7期66卷 2098-2108页

作者： Tao Li Chuang Feng Biquan Xiong Xuhui Zhu Zhicai He Wai-Yeung Wong Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and DevicesSchool of Material Science and EngineeringSouth China University of TechnologyGuangzhou 510640China Department of Applied Biology&Chemical Technology and Research Institute for Smart Energy The Hong Kong Polytechnic UniversityHung HomHong KongChina

The lack of a robust interfacial driving source over multicomponent photocatalysts is an essential contributor to the sluggish spatial charge transfer across the heterointerface and severe carrier recombination,thereby rendering maneuvering charge transfer of composite materials a thorny ***,we demonstrate an electric dipole moment-driven charge transfer photosystem utilizing amine-containing polyfluorene polyelectrolyte(i.e.,PFN)and inorganic semiconductor matrices(i.e.,WO_(3))as the building blocks to direct the interfacial charge transfer,effectively targeting the photoexcited charge carriers to the active *** results and theoretical simulations reveal that the electronic coupling interaction between the pendant electron-rich amine groups along the PFN backbone and WO_(3)surface enables the nonuniform charge distribution at the interface over the WO_(3)@PFN heterojunction,which ultimately fosters the formation of interfacial dipoles oriented from conjugated macromolecular backbone of PFN to the surface of WO_(3)*** interfacial dipoles with excellent charge transfer kinetics spontaneously activate the unidirectional and accelerated S-scheme charge motion from the WO_(3)framework to the conjugated chain of PFN due to the suitable band offsets at the interface,thus endowing WO_(3)@PFN heterostructures with a significantly enhanced net efficiency of *** findings would provide some insights into the design of advanced heterojunction photocatalysts for solar energy conversion as well as the study of the working mechanism of polyelectrolyte interlayers in optoelectronic devices.

关键词： photocatalysis heterojunction interfacial dipole polyelectrolyte S-scheme

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Light field reconstruction and measurement based on focal stack

Light field reconstruction and measurement based on focal st...

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2024 International Conference on Optical and Photonic Engineering, icOPEN 2024

作者： Zhang, Zhiting Gu, Wanyu Cai, Zewei Liu, Xiaoli Peng, Xiang Key Laboratory of Optoelectronic Devices and Systems Ministry of Education and Guangdong Province College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen Guangdong China Key Laboratory of Intelligent Optical Measurement and Detection of Shenzhen College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen Guangdong China Shenzhen Zhongting United Technology Co. Ltd. Shenzhen Guangdong China Shenzhen International Graduate School Tsinghua University Shenzhen Guangdong China

ISBN: (数字)9781510688117

ISBN: (纸本)9781510688100

In this paper, we present a consistency analysis for focal stack-based light field reconstruction. A pre-calibrated light field camera is used to construct the metric mapping relationship in image-object space and the reference light field, based on which light fields are reconstructed and quantitatively analyzed. Sequentially, a consistent light field reconstruction method is proposed. Image-object space transformation is established through camera calibration and image distortion is corrected simultaneously in the focal scanning space. The image stack can then be uniformly converted from image space to object space for consistent light field reconstruction, which can finally realize depth measurement in the focal scanning space. © 2025 SPIE.

关键词： Cameras

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A neuromorphic device mimicking synaptic plasticity under different body fluid K^(+) homeostasis for artificial reflex path construction and pattern recognition

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Fundamental Research 2024年第2期4卷 353-361页

作者： Lu Yang Yao Ni Chengpeng Jiang Lu Liu Song Zhang Jiaqi Liu Lin Sun Wentao Xu Institute of Photoelectronic Thin Film Devices and Technology Key Laboratory of Optoelectronic Thin Film Devices and Technology of TianjinEngineering Research Center of Thin Film Photoelectronic TechnologyMinistry of EducationNankai UniversityTianjin 300350China Shenzhen Research Institute of Nankai University Shenzhen 518000China

The ionic environment of body fluids influences nervous functions for maintaining homeostasis in organisms and ensures normal perceptual abilities and reflex *** reflex activities,such as limb movements,are closely associated with potassium ions(K+).In this study,we developed artificial synaptic devices based on ion concentration-adjustable gels for emulating various synaptic plasticities under different K+concentrations in body *** addition to performing essential synaptic functions,potential applications in information processing and associative learning using short-and long-term plasticity realized using ion concentration-adjustable gels are *** synaptic devices can be used for constructing an artificial neural pathway that controls artificial muscle reflex activities and can be used for image pattern *** tests show a strong relationship with ion *** devices could be applied to neuromorphic robots and human-machine interfaces.

关键词： Nervous regulation Artificial synaptic device Ion gel Ion homeostasis Artificial reflex pathway

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Recent advances in iron-based sulfides electrocatalysts for oxygen and hydrogen evolution reaction

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Chinese Chemical Letters 2024年第1期35卷 181-195页

作者： Jing Mei Yuqing Deng Xiaohong Cheng Xing Wang Qi Wu State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200China Hubei Key Laboratory of Pollutant Analysis&Reuse Technology College of Chemistry and Chemical EngineeringHubei Normal UniversityHuangshi 435002China Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices Hubei University of Arts and ScienceXiangyang 441053China

Increasing environmental pollution and shortage of conventional fossil fuels have made it urgent to develop renewable and clean energy sources. Electrocatalytic water splitting, with its abundant raw materials, simple process, and zero carbon emission, is considered one of the most promising processes for producing carbon-neutral hydrogen which has excellent energy conversion efficiency and high gravimetric energy density. Among them, oxygen evolution reaction (OER) electrocatalysts and hydrogen evolution reaction (HER) electrocatalysts are critical to decreasing the intrinsic reaction energy barrier and boosting the hydrogen evolution efficiency. Therefore, it is imperative to develop and design low-cost, highly active, and stable OER and HER electrocatalysts to lower the overpotential and drive the electrocatalytic reactions. Transition metal sulfides, especially iron-based sulfides, have attracted extensive exploration by researchers as a result of its high abundance in the Earth's crust and near-metallic conductivity. Consequently, in this review, we systematically and comprehensively summarize the progress in the application of iron-based sulfides and their composites as OER and HER electrocatalysts in electrocatalysis. Detailed descriptions and illustrations of the special relationships among their composition, structure, and electrocatalytic performance are presented. Finally, this review points out the challenges and future prospects of iron-based sulfides in practical applications for designing and fabricating more promising iron-based sulfide OER and HER electrocatalysts. We believe that iron-based sulfide materials will have a wide range of application prospects as OER and HER electrocatalysts in the future.

关键词： Iron-based sulfides Electrocatalysts Doping Composites Water splitting

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Enabling stable 4.6 V LiCoO_(2) cathode through oxygen charge regulation strategy

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Journal of Energy Chemistry 2023年第1期76卷 557-565,I0014页

作者： Wen Zhang Xiaoyu Zhang Fangyuan Cheng Meng Wang Jing Wan Yuyu Li Jia Xu Yi Liu Shixiong Sun Yue Xu Chun Fang Qing Li Jiantao Han Yunhui Huang State Key Laboratory of Material Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina Department of Applied Physics Chongqing UniversityChongqing 401331China Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education Jianghan UniversityWuhan 430056HubeiChina

LiCoO_(2) is the preferred cathode material for consumer electronic products due to its high volumetric energy density. However, the unfavorable phase transition and surface oxygen release limits the practical application of LiCoO_(2)at a high-voltage of 4.6 V to achieve a higher energy density demanded by the market. Herein, both bulk and surface structures of LiCoO_(2)are stabilized at 4.6 V through oxygen charge regulation by Gd-gradient doping. The enrichment of highly electropositive Gd on LiCoO_(2) surface will increase the effective charge on oxygen and improve the oxygen framework stability against oxygen *** the other hand, Gd ions occupy the Co-sites and suppress the unfavorable phase transition and microcrack. The modified LiCoO_(2) exhibits superior cycling stability with capacity retention of 90.1% over 200 cycles at 4.6 V, and also obtains a high capacity of 145.7 m Ah/g at 5 C. This work shows great promise for developing high-voltage LiCoO_(2) at 4.6 V and the strategy could also contribute to optimizing other cathode materials with high voltage and large capacity, such as cobalt-free high-nickel and lithiumrich manganese-based cathode materials.

关键词： Li-ion batteries 4.6 V LiCoO_(2) Gd-gradient doping Oxygen charge Cycle stability

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