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engineering single-molecule fluorescence withasymmetric nano-antennas

Light(Science & Applications) 2021年第5期10卷 858-866页

作者： Wenqi Zhao Xiaochaoran Tian Zhening Fang Shiyi Xiao Meng Qiu Qiong He Wei Feng Fuyou Li Yuanbo Zhang Lei Zhou Yan-Wen Tan State Key Laboratory of Surface Physics and Department of Physics Fudan UniversityShanghai 200433China Shanghai Institute for Advanced Communication and Data Science Shanghai UniversityShanghai 200444China Key Laboratory of Specialty Fiber Optics and Optical Access Networks Joint International Research Laboratory of Specialty Fiber Optics and Advanced CommunicationShanghai UniversityShanghai 200444China Department of Chemistry and State Key Laboratory of Molecular Engineering of Polymers Fudan UniversityShanghai 200433China Institute for Nanoelectronic Devices and Quantum Computing Fudan UniversityShanghai 200433China Collaborative Innovation Center of Advanced Microstructures Nanjing 210093China Multiscale Research Institute of Complex Systems Fudan UniversityShanghai 200433China

As a powerful tool for studying molecular dynamics in bioscience,single-molecule fluorescence detection providesdynamical information buried in ensemble *** in the near-infrared(NIR)is particularly usefulbecause it offers higher signal-to-noise ratio and increased penetration depth in tissue compared with *** low quantum yield of most NIR fluorophores,however,makes the detection of single-moleculefluorescence ***,we use asymmetric plasmonic nano-antenna to enhance the fluorescence intensity ofAlEE1000,a typical NIR dye,by a factor up to *** asymmetric nano-antenna achieve such an enhancement mainlyby increasing the quantum yield(to~80%)rather than the local field,which degrades the molecules'*** coupled-mode-theory analysis reveals that the enhancements stem from resonance-matching between antennaand molecule and,more importantly,from optimizing the coupling between the near-and far-ield modes withdesigner asymmetric *** work provides a universal scheme for engineering single-molecule fluorescence inthe near-infrared regime.

关键词： stability. asymmetric quantum

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Lateral and Longitudinal Coordinated Control of Intelligent Vehicle Based on High-Precision Dynamics Model under High-Speed Limit Condition

IEEE Transactions on Intelligent Vehicles

引用

IEEE Transactions on Intelligent Vehicles 2024年 1-18页

作者： He, Zhicheng Gong, Liangke Zhou, Enlin Wei, Baolv Li, Eric Huang, Jin State Key Laboratory of Advanced Design and Manufacturing Technology for Vehicle the College of Mechanical and Transportation Engineering Hunan University Changsha China School of Computing Engineering & Digital Technologies Teesside University Middlesbrough U.K School of Vehicle and Mobility Tsinghua University Beijing China

This study focuses on improving the trajectory tracking control for intelligent vehicles in high-speed and large curvature limit conditions. To this end, a high-precision five-degree-of-freedom (5-DOF) dynamics model (HPM) that incorporates suspension characteristics is introduced. Furthermore, a coordinated lateral and longitudinal control system is developed. The lateral model predictive control (MPC) involves two crucial stages: initially, a desired trajectory with associated speed data is generated based on path curvature. Subsequently, using the high-precision 5-DOF dynamics model, an objective function is formulated to minimize the difference between the vehicle's current state and the desired state. This process determines the optimal front wheel steering angle, taking into account vehicle positional constraints and steering limitations. Additionally, a double proportional-integral-derivative (PID) controller for longitudinal control adjusts the throttle and brake pressure based on real-time position and speed data, ensuring integrated control over both lateral and longitudinal movements. The effectiveness of this approach is confirmed through real vehicle testing and simulation. Results show that the high-precision 5-DOF dynamics model markedly enhances the accuracy of vehicle response modeling, and the coordinated control system successfully executes precise trajectory tracking. In extreme scenarios of high-speed and large curvature, the enhanced model substantially improves trajectory accuracy and driving stability, thus promoting safe vehicle operation. IEEE

关键词： Trajectories

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One-step implementation of nonadiabatic geometric fSim gate in superconducting circuits

arXiv

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arXiv 2024年

作者： Yun, M.-R. Shan, Zheng Sun, Li-Li Yan, L.-L. Jia, Yu Su, S.-L. Chen, G. School of Physics Laboratory of Zhongyuan Light Key Laboratory of Materials Physics of Ministry of Education Zhengzhou University Zhengzhou450052 China State Key Laboratory of Mathematical Engineering and Advanced Computing Henan Zhengzhou450001 China College of Physics Tonghua Normal University Tonghua134000 China Institute of Quantum Materials and Physics Henan Academy of Sciences Zhengzhou450046 China Key Laboratory for Special Functional Materials of Ministry of Education School of Materials and Engineering Henan University Kaifeng475001 China

Due to its significant application in reducing algorithm depth, fSim gates have attracted a lot of attention. However, during the implementation of quantum gates, fluctuations in control parameters and decoherence caused by the environment may lead to a decrease in the fidelity of the gate. Implementing the fSim gate that is robust to these factors in one step remains an unresolved issue. In this manuscript, we propose a one-step implementation of the nonadiabatic geometric fSim gate composed of a nonadiabatic holonomic controlled phase (CP) gate and a nonadiabatic noncyclic geometric iSWAP gate with parallel paths in a tunable superconducting circuit. Compared to the composite nonadiabatic geometric fSim gate composed of a nonadiabatic holonomic CP gate and a nonadiabatic geometric iSWAP gate, our scheme only takes half the time and demonstrates robustness to parameter fluctuations, as well as to environmental impacts. Moreover, the scheme does not require complex controls, making it very easy to implement in experiments, and can be achieved in various circuit structures. Our scheme may provide a promising path toward quantum computation and simulation. Copyright © 2024, The Authors. All rights reserved.

关键词： Environmental impact

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Abuse-Resistant Deniable Encryption

SSRN

引用

SSRN 2023年

作者： Cao, Yanmei Wei, Jianghong Xiang, Yang Susilo, Willy Chen, Xiaofeng State Key Laboratory of Integrated Service Networks Xidian University Xi’an710071 China State Key Laboratory of Mathematical Engineering and Advanced Computing PLA Strategic Support Force Information Engineering University Zhengzhou450001 China School of Software and Electrical Engineering Swinburne University of Technology MelbourneVIC3122 Australia Institute of Cybersecurity and Cryptology University of Wollongong WollongongNSW2522 Australia

Deniable encryption (DE) allows private communication over an insecure channel even under the coercion. That is, after an adversary forces communication participants to reveal their secret keys and randomness used during the communication, the message confidentiality can still be preserved. Since its introduction, a large body of studies have been made to improve the DE system in terms of efficiency, security definition and functionality, which is the focus of this paper. However, as far as we know, none of existing DE systems considers the abuse of deniability caused by malicious users, which is a crucial feature from the view of practical applications of DE. For instance, a malicious user (e.g., an employee who holds some sensitive documents and intends to sell these confidential contents for obtaining financial gain) can utilize a DE system to transmit the confidential content without the risk of being caught, which is extremely dangerous to the interests and security of his/her organization. In this paper, to mitigate this threat, we formally define the syntax and security notions of abuse-resistant deniable encryption, which restricts what users can deny. Then, we put forward a concrete construction of abuse-resistant DE scheme, and prove its security under the assumptions of indistinguishability obfuscation and oneway function. Compared with other related work, the proposed construction has advantages in terms of functionality and ciphertext rate simultaneously. © 2023, The Authors. All rights reserved.

关键词： Data obfuscation

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Study on Binary Code Evolution with Concrete Semantic Analysis

Study on Binary Code Evolution with Concrete Semantic Analys...

引用

2021国际计算机前沿大会

作者： Bing Xia Jianmin Pang Jun Wang Fudong Liu Feng Yue Key Laboratory of Mathematical Engineering and Advanced Computing Zhong Yuan University of Technology

The study on binary code evolution is very crucial for understanding vulnerability repair and malicious code variants. Researchers on code evolution focus on the source code level, whereas very few works have been done to tackle this problem at the binary code level. In this paper, a binary code evolution analysis framework is proposed to automatically locate evolution area and identify evolution semantic with concrete semantic difference. Difference of binary function domain was applied based on function similarity. Trace alignment was used to find evolution blocks, instruction classification semantic was utilized to identify evolution operation, and evolution semantic was extracted combined with function domain elements. The experimental results show that binary code evolution analysis framework can correctly locate binary code evolution area and identify all concrete semantic evolution.

关键词：

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High-throughput studies and machine learning for design of β titanium alloys with optimum properties

引用

Transactions of Nonferrous Metals Society of China 2024年第10期34卷 3194-3207页

作者： Wei-min CHEN Jin-feng LING Kewu BAI Kai-hong ZHENG Fu-xing YIN Li-jun ZHANG Yong DU Guangdong Provincial Key Laboratory of Metal Toughening Technology and Application National Engineering Research Center of Powder Metallurgy of Titanium&Rare MetalsInstitute of New MaterialsGuangdong Academy of SciencesGuangzhou 510650China Institute of Advanced Wear&Corrosion Resistant and Functional Materials Jinan UniversityGuangzhou 510632China Institute of High Performance Computing Agency for ScienceTechnology and Research138632Singapore State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China

Based on experimental data,machine learning(ML) models for Young's modulus,hardness,and hot-working ability of Ti-based alloys were *** the models,the interdiffusion and mechanical property data were high-throughput re-evaluated from composition variations and nanoindentation data of diffusion ***,the Ti-(22±0.5)at.%Nb-(30±0.5)at.%Zr-(4±0.5)at.%Cr(TNZC) alloy with a single body-centered cubic(BCC) phase was screened in an interactive *** experimental results exhibited a relatively low Young's modulus of(58±4) GPa,high nanohardness of(3.4±0.2) GPa,high microhardness of HV(520±5),high compressive yield strength of(1220±18) MPa,large plastic strain greater than 30%,and superior dry-and wet-wear *** work demonstrates that ML combined with high-throughput analytic approaches can offer a powerful tool to accelerate the design of multicomponent Ti alloys with desired ***,it is indicated that TNZC alloy is an attractive candidate for biomedical applications.

关键词： high-throughput machine learning Ti-based alloys diffusion couple mechanical properties wear behavior

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Full description of dipole orientation in organic light-emitting diodes

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Chinese Optics Letters 2023年第2期21卷 92-98页

作者：范灵杰赵茂雄楚娇沈唐尧郑敏嘉关放殷海玮石磊资剑 Department of Physics Key Laboratory of Micro-and Nano-Photonic Structures(Ministry of Education)and State Key Laboratory of Surface PhysicsFudan UniversityShanghai 200433China Shanghai Engineering Research Center of Optical Metrology for Nano-fabrication(SERCOM) Shanghai 200433China Institute for Nanoelectronic Devices and Quantum Computing Fudan UniversityShanghai 200438China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China

Considerable progress has been made in organic light-emitting diodes(OLEDs)to achieve high external quantum efficiency,among which dipole orientation has a remarkable *** most cases,the radiation of the dipoles in OLEDs is theoretically predicted with only one orientation parameter to match with corresponding ***,we develop a new theory with three orientation parameters to fully describe the relationship between dipole orientation and power ***,we design an optimal test structure for measuring all three orientation *** three orientation parameters could be retrieved from non-polarized *** theory provides a universal plot of dipole orientations in OLEDs,paving the way for designing more complicated OLED devices.

关键词： organic light-emitting diodes dipole orientation Fourier series expansion

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Macroscopic assembled graphene nanofilms based room temperature ultrafast mid-infrared photodetectors

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InfoMat 2022年第6期4卷 129-140页

作者： Li Peng Lixiang Liu Sichao Du Srikrishna Chanakya Bodepudi Lingfei Li Wei Liu Runchen Lai Xiaoxue Cao Wenzhang Fang Yingjun Liu Xinyu Liu Jianhang Lv Muhammad Abid Junxue Liu Shengye Jin Kaifeng Wu Miao-Ling Lin Xin Cong Ping-Heng Tan Haiming Zhu Qihua Xiong Xiaomu Wang Weida Hu Xiangfeng Duan Bin Yu Zhen Xu Yang Xu Chao Gao MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringInternational Research Center for X PolymersZhejiang UniversityHangzhouChina School of Micro-nanoelectronics State Key Laboratory of Silicon MaterialsHangzhou Global Scientific and Technological Innovation CenterZJU-UIUC Joint InstituteZhejiang UniversityHangzhouChina State Key Laboratory of Molecular Reaction Dynamics and Dynamics Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalianChina State Key Laboratory of Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijingChina Department of Chemistry Zhejiang UniversityHangzhouChina Division of Physics and Applied Physics School of Physical and Mathematical SciencesNanyang Technological UniversitySingaporeSingapore National Laboratory of Solid State Microstructures Collaborative Innovation Center of Advanced MicrostructureSchool of Electronic Science and EngineeringNanjing UniversityNanjingChina State Key Laboratory of Infrared Physics Shanghai Institute of Technical PhysicsChinese Academy of SciencesShanghaiChina Department of Chemistry and Biochemistry California Nanosystems InstituteUniversity of CaliforniaLos AngelesCaliforniaUSA

Graphene with linear energy dispersion and weak electron-phonon interaction is highly anticipated to harvest hot electrons in a broad wavelength ***,the limited absorption and serious backscattering of hot-electrons result in inadequate quantum yields,especially in the mid-infrared ***,we report a macroscopic assembled graphene(nMAG)nanofilm/silicon heterojunction for ultrafast mid-infrared *** assembled Schottky diode works in 1.5-4.0μm at room temperature with fast response(20-30 ns,rising time,4 mm2 window)and high detectivity(1.61011 to 1.9109 Jones from 1.5 to 4.0μm)under the pulsed laser,outperforming single-layer-graphene/silicon photodetectors by 2-8 *** performances are attributed to the greatly enhanced photo-thermionic effect of electrons in nMAG due to its high light absorption(~40%),long carrier relaxation time(~20 ps),low work function(4.52 eV),and suppressed carrier number *** nMAG provides a long-range platform to understand the hot-carrier dynamics in bulk 2D materials,leading to broadband and ultrafast MIR active imaging devices at room temperature.

关键词： graphene nanofilm heterojunction macro-assembly mid-infrared photodetector photothermionic effect

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Observation of Bragg polaritons in monolayer tungsten disulphide

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Nano Research 2022年第2期15卷 1479-1485页

作者： Xu Wang Lishu Wu Xuewen Zhang Weihuang Yang Zheng Sun Jingzhi Shang Wei Huang Ting Yu Shaanxi Institute of Flexible Electronics(SIFE) Northwestern Poly technical University(NPU)1 Dongxiang RoadXi’an 710129China Division of Physics and Applied Physics School of Physical and Mathematical SciencesNanyang Technological UniversitySingapore 637371 Ministry of Education Engineering Research Center of Smart Microsensors and Microsystems College of Electronics and InformationHangzhou Dianzi UniversityHangzhou 310018China State Key Laboratory of Precision Spectroscopy East China Normal University500 Dongchuan RoadShanghai 200241China Key Laboratory of Flexible Electronics and Institute of Advanced Materials National Jiangsu Synergetic Innovation Centre for Advanced MaterialsNanjing Tech University30 South Puzhu RoadNanjing 211816China

Strong light-matter interactions involved with photons and quasiparticles are fundamentally interesting to access the wealthy many-body physics in quantum *** emerging two-dimensional(2D)semiconductors with large exciton binding energies and strong quantum confinement allow to investigate exciton-photon coupling at elevated *** we report room-temperature formation of Bragg polaritons in monolayer semiconductor on a dielectric mirror through the exciton-Bragg photon *** the negative detuning energy of -30 meV,angle-resolved reflection signals reveal anti-crossing behaviors of lower and upper polariton branches at±18°together with the Rabi splitting of 10 ***,the strengthened photoluminescence appears in the lower polariton branch right below the anti-crossing angles,indicating the presence of the characteristic bottleneck effect caused by the slowing exciton-polariton energy relaxation towards the band *** extracted coupling strength is between the ones of weak and distinct strong coupling regimes,where the eigenenergy splitting induced by the moderate coupling is resolvable but not large enough to fully separate two polaritonic *** work develops a simplified strategy to generate exciton-polaritons in 2D semiconductors and can be further extended to probe the intriguing bosonic characteristics of these quasiparticles,such as Bose-Einstein condensation,polariton lasing and superfluidity,directly at the material surfaces.

关键词： Bragg polariton exciton-photon coupling two-dimensional(2D)semiconductor Rabi splitting microcavity

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mathematical modeling of mixed convective MHD Falkner-Skan squeezed Sutterby multiphase flow with non-Fourier heat flux theory and porosity

引用

Applied Mathematics and Mechanics(English Edition) 2023年第11期44卷 2005-2018页

作者： Shuguang LI M.I.KHAN F.ALI S.S.ABDULLAEV S.SAADAOUI HABIBULLAH School of Computer Science and Technology Shandong Technology and Business UniversityYantai 264005Shandong ProvinceChina Department of Mechanics and Engineering Science Peking UniversityBeijing 100871China Department of Mechanical Engineering Lebanese American UniversityBeirut 11020Lebanon Department of Mathematical Sciences Federal Urdu University of ArtsSciences&TechnologyGulshan-e-IqbalKarachi 75300Pakistan Faculty of Chemical Engineering New Uzbekistan UniversityTashkent 100070Uzbekistan Department of Science and Innovation Tashkent State Pedagogical University named after NizamiTashkent 100070Uzbekistan Department of Physics Faculty of Science and ArtsMohayel AserKing Khalid UniversityAbha 61421Saudi Arabia State Key Laboratory of Turbulence and Complex System Collaborative Innovative Center for Advanced Aero-EnginesPeking UniversityBeijing 100871China

In a wide variety of mechanical and industrial applications,e.g.,space cooling,nuclear reactor cooling,medicinal utilizations(magnetic drug targeting),energy generation,and heat conduction in tissues,the heat transfer phenomenon is ***’s law of heat conduction has been used as the foundation for predicting the heat transfer behavior in a variety of real-world *** model’s production of a parabolic energy expression,which means that an initial disturbance would immediately affect the system under investigation,is one of its main ***,numerous researchers worked on such problem to resolve this *** last,this problem was resolved by Cattaneo by adding relaxation time for heat flux in Fourier’s law,which was defined as the time required to establish steady heat conduction once a temperature gradient is *** offered a material invariant version of Cattaneo’s model by taking into account the upper-connected derivative of the Oldroyd ***,both models are combinedly known as the Cattaneo-Christov(CC)*** this attempt,the mixed convective MHD Falkner-Skan Sutterby nanofluid flow is addressed towards a wedge surface in the presence of the variable external magnetic *** CC model is incorporated instead of Fourier’s law for the examination of heat transfer features in the energy expression.A two-phase nanofluid model is utilized for the implementation of *** nonlinear system of equations is tackled through the bvp4c technique in the MATLAB software *** influence of pertinent flow parameters is discussed and displayed through different *** and important results are summarized in the conclusion ***,in both cases of wall-through flow(i.e.,suction and injection effects),the porosity parameters increase the flow speed,and decrease the heat transport and the influence of drag forces.

关键词： sporosity Cattaneo-Christov(CC)heat flux model Falkner-Skan Sutterby nanofluid mixed convection stagnation point

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