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5th IEEE Eurasia Conference on IOT, Communication and Engineering, ECICE 2023

作者： Cao, Bingbing Liu, Hong Yang, Hao Sun, Dong Xiamen University of Technology School of Optoelectronics and Communication Engineering Xiamen361024 China Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Shenzhen China Xiamen University of Technology Fujian Key Laboratory of Optoelectronic Technology and Devices Xiamen361024 China

ISBN: (纸本)9798350314694

The timely rescue of injured individuals has remained the central task of disaster relief endeavors. Nonetheless, the escalating number of casualties and losses has presented formidable challenges to post-disaster emergency rescue operations. The quality of information processing directly impacts the decision-making process for dispatching rescue vehicles, and suboptimal information processing diminishes the efficiency of rescue vehicle dispatch. To address this predicament, we developed a rescue vehicle transportation route decision system using the Internet of Things (IoT) technology. By leveraging the IoT technology, interactions were established between rescue vehicles and their actual environments, thereby furnishing data support for the improved ant colony optimization algorithm. The introduction of this model and algorithm organizes rescue vehicle deployment for injured patients effectively, guaranteeing that these vehicles assist those individuals in most urgent need. This contributes to an overall enhancement of the efficiency of disaster relief endeavors. © 2023 IEEE.

关键词： ant colony algorithm injured individuals rescue IoT technology path optimization vehicle scheduling

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Shape-preserving storage of elegant Ince-Gaussian modes in warm atomic vapor

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Chinese Optics Letters 2023年第7期21卷 64-68页

作者：沈泽昊王程远陈云吴启凡杨晔杨欣高宏李福利 Ministry of Education Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter Shaanxi Provincial Key Laboratory of Quantum Information and Quantum Optoelectronic Devices and Shaanxi Provincial Key Laboratory of Optical Information TechnologySchool of PhysicsXi'an Jiaotong UniversityXi'an 710049China

Multimode photonic quantum memory could enhance the information processing speed in a quantum repeater-based quantum network. A large obstacle that impedes the storage of the spatial multimode in a hot atomic ensemble is atomic diffusion, which severely disturbs the structure of the retrieved light field. In this paper, we demonstrate that the elegant InceGaussian(eIG) mode possesses the ability to resist such diffusion. Our experimental results show that the overall structure of the eIG modes under different parameters maintains well after microseconds of storage. In contrast, the standard IG modes under the same circumstance are disrupted and become unrecognizable. Our findings could promote the construction of quantum networks based on room-temperature atoms.

关键词： elegant Ince-Gaussian mode hot atomic ensemble antidiffusion

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Correlation effects in a simplified bilayer two-orbital Hubbard model at half filling

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Physical Review B 2024年第23期110卷 235155-235155页

作者： Jian-Jian Yang Dao-Xin Yao Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices State Key Laboratory of Optoelectronic Materials and Technologies Center for Neutron Science and Technology and School of Physics Sun Yat-sen University Guangzhou 510275 China

Motivated by the discovery of high-temperature superconductivity in bilayer nickelate La3Ni2O7 under pressure, we investigate the ground-state phase diagram and correlation effects using determinant quantum Monte Carlo simulations in a simplified bilayer two-orbital Hubbard model at half filling. Our results reveal the emergence of a nonmagnetic weakly insulating phase at weak on-site Hubbard interactions, transitioning to an antiferromagnetic Mott insulating phase as the interaction strength exceeds a critical value U/t1x≈4.15. This phase transition is consistent with the 3D O(3) Heisenberg universality class. Additionally, we analyze dynamical properties such as the single-particle spectral function and dynamic spin structure factor. The pronounced interlayer correlation of d3z2−r2 orbitals results in a downward trend and an extended flatness in the γ band, mirroring the angle-resolved photoemission spectroscopy findings under ambient pressure. Our numerical results provide important clues for understanding the strong correlation effects in La3Ni2O7.

关键词： Hubbard model

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Nano-thick SiO_(2) channel for subwavelength plasmonic orbital angular momentum mode transmission

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Chinese Optics Letters 2025年第1期23卷 127-133页

作者： Zhishen Zhang Xiaobo Heng Shuai Gao Li Zhang Fei Lin Weicheng Chen Jiulin Gan Guangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology School of Physics and Optoelectronic EngineeringFoshan UniversityFoshan 528225China GBA Branch of Aerospace Information Research Institute Chinese Academy of SciencesGuangzhou 510700China State Key Laboratory of Luminescent Materials and Devices and Institute of Optical Communication Materials South China University of TechnologyGuangzhou 510640China

Orbital angular momentum(OAM)waveguides are critical for multi-channel photonic-on-chip ***,current large-mode-area waveguides pose a challenge for OAM device ***,a novel hybrid plasmonic waveguide is theoretically proposed to decrease the OAM mode area by two orders of *** from the Ag-As_(2)S_(3)-SiO_(2)-As_(2)S_(3)-Ag five-layer cylindrical structure,the guided OAM mode realizes a larger figure of merit of *** on this waveguide,an OAM coupler with a record-breaking small footprint(0.68μm×5.7μm)is *** proposed waveguide enables subwavelength OAM light transmission,which provides a key building block for high-density OAM photonics circuits.

关键词： orbital angular momentum waveguide hybrid plasmonic waveguide directional coupler

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Blood cell counting based on U-Net++ and YOLOv5

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optoelectronics Letters 2023年第6期19卷 370-376页

作者： BAI Hua WANG Xuechun GUAN Yingjian GAO Qiang HAN Zhibo Tianjin Key Laboratory of Optoelectronic Detection Technology and Systems School of Electronic and Information EngineeringTiangong UniversityTianjin 300387China Shenzhen Weian Co-create Biotechnology Co. Ltd.Shenzhen 518000China Tianjin Key Laboratory of Engineering Technologies for Cell Phamaceutical Tianjin 300457China National Engineering Research Center of Cell Products/AmCellGene Co. Ltd.Tianjin 300457China

Clinical information about a variety of disorders is available through blood cell counting,which is usually done by manual ***,manual methods are complex,time-consuming and susceptible to the subjective experience of *** many efforts have been made to develop automated blood cell counting algorithms,the complexity of blood cell distribution and the highly overlapping nature of some red blood cells(RBCs) remain significant challenges that limit the improvement of analytical ***,we proposed an end-to-end method for blood cell counting based on deep ***,U-Net++ was used to segment the whole blood cell image into several regions of interest(ROI),and each ROI contains only one single cell or multiple overlapping ***,YOLOv5 was used to detect blood cells in each ***,we proposed several strategies,including fine classification of RBCs,adaptive adjustment for non-maximal suppression(NMS) threshold and blood cell morphology constraints to improve the accuracy of ***,the detection outcomes for each ROI were combined and *** results show that our method can effectively address the issue of high overlap and precisely segment and detect blood cells,with a 98.18% accuracy rate for blood cell counting.

关键词： Blood consuming overlap

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Electric field intensity measurement by using doublet electromagnetically induced transparency of cold Rb Rydberg atoms

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Chinese Physics B 2023年第10期32卷 405-409页

作者：宫廷师帅姬中华郭古青孙小聪田亚莉邱选兵李传亮赵延霆贾锁堂 Shanxi Engineering Research Center of Precision Measurement and Online Detection Equipment School of Applied ScienceTaiyuan University of Science and TechnologyTaiyuan 030024China State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Laser SpectroscopyShanxi UniversityTaiyuan 030006China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

We demonstrate a simple method to measure electric field intensity by using doublet electromagnetically induced transparency(EIT) spectra of cold Rb Rydberg atoms, where the frequency of the coupling laser does not need to be locked. Based on the Stark splitting of the Rb Rydberg state, 10D_(3/2), under electric fields and the corresponding calculated polarizabilities, the real electric field intensity is calculated using the difference in radio-frequency diffraction between two acousto-optic modulators, which acts as a frequency criterion that allows us to measure the electrical field without locking the coupling laser. The value measured by this simple method shows a good agreement with our previous work [*** 29 1558(2021)] where the frequency of the coupling laser needs to be locked with an additional EIT spectrum based on atom vapor and a proportional–integral–differential feedback circuit. Our presented method can also be extended to the measurement of electric field based on hot Rydberg atom vapor, which has application in industry.

关键词： doublet electromagnetically induced transparency(EIT) Aulter–Townes(AT)splitting Rydberg atom electric field measurement

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High-efficiency thermally activated delayed fluorescence materials via a shamrock-shaped design strategy to enable OLEDs with external quantum efficiency over 38%

Aggregate

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Aggregate 2023年第6期4卷 120-129页

作者： Gaoyu Li Junrong Pu Zhan Yang Huangjun Deng Yanyan Liu Zhu Mao Juan Zhao Shi-Jian Su Zhenguo Chi PCFM Lab GD HPPC LabState Key Laboratory of Optoelectronic Material and TechnologiesGuangdong Engineering Technology Research Center for High performance Organic and Polymer Photoelectric Functional FilmsSchool of ChemistrySun Yat-sen UniversityGuangzhouP.R.China State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices South China University of TechnologyGuangzhouP.R.China Shenzhen Institute of Advanced Electronic Materials Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhenChina State Key Laboratory of Optoelectronic Material and Technologies School of Materials Science and EngineeringSun Yat-sen UniversityGuangzhouChina

To achieve highly-efficient organic light-emitting diodes(OLEDs),great efforts have been devoted into constructing thermally activated delayed fluorescence(TADF)with high horizontal dipole ratios(Θ//).Here,we proposed a design strategy by integrating a rigid electron-accepting oxygen-bridged boron core with triple electron-donating groups,which exhibited a“shamrock-shape”,namely BO-3DMAC and *** from the rigid and large-planar skeletons brought by shamrock-shaped design,BO-3DMAC and BO-3DPAC exhibit highΘ//of 84%/70%and 93%/94%in neat/doped films,respectively,and finally furnish excellent external quantum efficiencies(EQEs)of up to 28.3%and 38.7%in 20 wt%doped OLEDs with sky-blue emission,as well as adequate EQEs of up to 21.0%and 16.7%in nondoped *** work unveils a promising strategy to establish high-Θ//TADF emitters by constructing large-planar molecular structures using shamrock-shaped design.

关键词： aggregation-induced emission horizontal dipole ratios organic light-emitting diodes sky-blue emission thermally activated delayedﬂuorescence

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High-power mid-infrared femtosecond master oscillator power amplifier Er:ZBLAN fiber laser system

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High Power Laser Science and Engineering 2023年第4期11卷 85-90页

作者： Linpeng Yu Jinhui Liang Qinghui Zeng Jiacheng Wang Xing Luo Jinzhang Wang Peiguang Yan Fanlong Dong Xing Liu Qitao Lü Chunyu Guo Shuangchen Ruan Shenzhen Key Laboratory of Laser Engineering Guangdong Provincial Key Laboratory of Micro/Nano Optomechatronics EngineeringKey Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceState Key Laboratory of Radio Frequency Heterogeneous IntegrationCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhenChina Key Laboratory of Advanced Optical Precision Manufacturing Technology of Guangdong Higher Education Institutes Shenzhen Technology UniversityShenzhenChina Han’s Laser Technology Industry Group Co. Ltd.ShenzhenChina

High-power femtosecond mid-infrared(MIR)lasers are of vast importance to both fundamental research and *** report a high-power femtosecond master oscillator power amplifier laser system consisting of a singlemode Er:ZBLAN fiber mode-locked oscillator and pre-amplifier followed by a large-mode-area Er:ZBLAN fiber main *** main amplifier is actively cooled and bidirectionally pumped at 976 nm,generating a slope efficiency of 26.9%.Pulses of 8.12 W,148 fs at 2.8μm with a repetition rate of 69.65 MHz are *** the best of our knowledge,this is the highest average power ever achieved from a femtosecond MIR laser *** a compact ultrafast laser system is promising for a wide range of applications,such as medical surgery and material processing.

关键词： femtosecond fiber laser fluoride fiber amplifier master oscillator power amplifier mid-infrared

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Self-doped conjugated polymers with electron-deficient quinone units for enhanced electron transport in highly efficient organic solar cells

FlexMat

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FlexMat 2024年第2期1卷 105-115页

作者： Xi Luo Jiangkai Yu Haoran Tang Houji Cai Wei Xiong Kai Zhang Fei Huang Yong Cao Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and Devices South China University of Technology (SCUT) Guangzhou China Haoran Tang and Fei Huang.

Organic solar cells (OSCs) have attracted significant attention as a burgeoning flexible technology, owing to their advanced power conversion efficiencies. Moreover, interface materials play a crucial role in optimizing energy level alignment between the active layer and electrodes, thereby enhancing carrier extraction within the device and improving efficiency. However, current methodologies for fabricating electron-transport materials with superior mobility are still limited compared with those for hole-transport materials. In this study, a benzodifurandione (BFDO)-derived building block with quinone resonance property and strong electron-withdrawing capability was synthesized. Two conjugated polymers, namely PBFDO-F6N and PBFDO-F6N-Br, were prepared, both of which exhibited good electron mobility and exceptional interface modification capabilities. A comprehensive investigation of the interaction between the interface layer and the active layer revealed that PBFDO-F6N induced doping at the acceptor interface. Additionally, the high mobility of PBFDO-F6N facilitated efficient carrier extraction at the interface. Consequently, the application of PBFDO-F6N as the cathode interface layer for PM6:BTP-eC9-based OSC devices resulted in a remarkable efficiency of 18.11%. Moreover, the device efficiency remained at ∼96% even at a PBFDO-F6N interface thickness of 50 nm, demonstrating the great potential of this material for large-scale device preparation.

关键词： electron transport materials organic solar cells quinone structure self n-doping

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Metal-organic-frameworks passivated CuBi_(2)O_(4)photocathodes boost CO_(2)reduction kinetics

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Materials Reports(Energy) 2023年第4期3卷 60-70页

作者： Jiaqi Jin Guangming Cao Yanjie Liu Yingying Shu Zhiyuan Deng Wei Sun Xiaogang Yang Institute of Materials Science and Devices School of Material Science and EngineeringSuzhou University of Science and TechnologySuzhou215009PR China School of Computing and Artificial Intelligence Southwest Jiaotong UniversityChengdu611756PR China Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province Key Laboratory of Functional Materials and Photoelectrochemistry of HaikouCollege of Chemistry and Chemical EngineeringHainan Normal UniversityHaikou571158PR China

Photoelectrochemical reduction of CO_(2)to produce CO with metal-organic frameworks(MOFs)is recognized as a desirable technology to mitigate CO_(2)emission and generate sustainable *** achieve highly efficient electrocatalyst,it is essential to design a new material interface and uncover new reaction mechanisms or ***,we developed two metal-organic Cu-MOF and Bi-MOF layers using benzene tricarboxylic acid(H_(3)BTC)ligands on CuBi_(2)O_(4) *** MOF layers drastically improved the photoelectrochemical stability by suppressing the photo-corrosion through conformal surface *** Cu-MOF modified CuBi_(2)O_(4) showed more significant charge separation and transfer efficiencies than the Bi-MOF modified *** on the transient photocurrent curves under the applied potential of 0.6 V ***,the rate-law analysis showed the CO_(2)photoreduction took place through a first-order ***,the photoelectrochemical impedance spectra(PEIS)revealed this reaction order,representing an“operando”***,the reaction rate constant on Cu-MOF modified sample was higher than that on Bi-MOF modified one and bare CuBi_(2)O_(4).Combined with the density functional theory calculation,the surface absorption of CO_(2)and CO molecules and the higher energy barrier for*COOH intermediates could significantly determine the first order reaction.

关键词： Copper bismuth oxide Carbon dioxide photoelectrochemical reduction Metal-organic framework Rate-law kinetics

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