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Quantum-Interference-Enhanced Phonon Laser in Cavity Optomechanics

Physical Review Applied 2023年第5期19卷 054093-054093页

作者： Changyong Lei Jie Ren Center for Phononics and Thermal Energy Science China-EU Joint Lab on Nanophononics Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology School of Physics Science and Engineering Tongji University Shanghai 200092 China

Cavity-optomechanics-based phonon lasers are traditionally described in terms of three-mode resonance, while the energy nonconservation optomechanical terms are conventionally ignored. Here, we present a complete theory of phonon lasers, emphasizing the importance of the previously omitted optomechanical interaction. We show that this indispensable optomechanical interaction is equivalent to a Kerr nonlinear interaction. Analytical results show that the interference between this Kerr-type interaction and three-mode resonance adds a transition channel with no phonon emission or absorption, thus enhancing phonon lasing and realizing an ultralow-threshold phonon laser and even a phonon cooler. The interference effect produces an asymmetric gain profile with a Fano spectral shape in addition to the traditional Lorentzian shape. Our complete theory shows perfect agreement with existing experiments and provides a new degree of freedom to manipulate optomechanical phonon lasers.

关键词： Lasers Mechanical effects of light on material media Optomechanics Phonons Photonics Quantum optics

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Twist-Induced Near-Field Radiative Heat Switch in Hyperbolic Antiferromagnets

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Physical Review Applied 2023年第2期19卷 024044-024044页

作者： Yuanyang Du Jiebin Peng Zhong Shi Jie Ren Center for Phononics and Thermal Energy Science China-EU Joint Lab on Nanophononics Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology School of Physics Science and Engineering Tongji University Shanghai 200092 China

We study the twist-induced control of the near-field radiative heat transfer between two hyperbolic antiferromagnetic insulators under external magnetic fields. We show that the near-field heat flux can be affected by both the twist angle θ and the magnitude of the applied magnetic field with different broken symmetries. Irrespective of the twist angle, the external magnetic field causes the radiative heat flux to change nonmonotonically, and the minimum heat flux can be found with magnetic fields of approximately 1.5 T. Such nonmonotonic behavior is because the magnetic field can radically change the nature of the magnon polaritons with time-reversal symmetry breaking. The field not only affects the topological structure of surface magnon polaritons but also induces volume magnon polaritons that progressively dominate the heat transfer as the field increases. We further propose a twist-induced thermal switch device with inversion symmetry breaking, which can strongly regulate radiative heat flux through different magnetic fields. Our findings account for a characteristic modulation of radiative heat transfer with implications for applications in efficient thermal management.

关键词： Heat radiation Heat transfer Near-field optics Antiferromagnets Energy applications Magnetic insulators Infrared techniques

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The Effects of Rotor on the Measurement Characteristics of Spinning Rotor Gauge

The Effects of Rotor on the Measurement Characteristics of S...

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第10届亚洲和澳大利亚真空与表面科学会议、中国真空学会2021学术年会、第十五届国际真空科学与工程应用学术会议

作者： ZHOU Mingxu GUO Meiru DENG Yongsheng LI Detian School of Mechanical Engineering and Automation Northeastern University Science and Technology on Vacuum Technology and Physics Laboratory Lanzhou Institute of Physics

Spinning Rotor Gauge is one type of precise viscous vacuum gauge,which has high accuracy at *** key component is a metal ball （rotor） which is suspended in vacuum and rotates *** this study,the design of the experim... 详细信息

关键词： Spinning rotor gauge Rotor Materials Roughness Spherical error

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Abnormal anti-oxidation behavior of hexagonal boron nitride grown on copper

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Nano Research 2022年第8期15卷 7577-7583页

作者： Li Wang Jiajie Qi Shuai Zhang Mingchao Ding Wei Wei Jinhuan Wang Zhihong Zhang Ruixi Qiao Zhibin Zhang Zehui Li Kehai Liu Ying Fu Hao Hong Can Liu Muhong Wu Wenlong Wang Jun He Yi Cui Qunyang Li Xuedong Bai Kaihui Liu State Key Laboratory for Mesoscopic Physics Frontiers Science Center for Nano-optoelectronicsSchool of PhysicsPeking UniversityBeijing 100871China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Department of Engineering Mechanics State Key Laboratory of TribologyTsinghua UniversityBeijing 100084China Vacuum Interconnected Nanotech Workstation Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China School of Chemistry and Chemical Engineering Beijing Institute of TechnologyBeijing 100081China International Centre for Quantum Materials Collaborative Innovation Centre of Quantum MatterPeking UniversityBeijing 100871China Songshan Lake Materials Laboratory Institute of PhysicsChinese Academy of SciencesDongguan 523808China CAS Center for Excellence in Nanoscience CAS Key Laboratory of Nanosystem and Hierarchical FabricationNational Center for Nanoscience and TechnologyBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China

Atomic-layered hexagonal boron nitride(hBN)is expected to be the best two-dimensional(2D)anti-oxidation layer on metals for its incomparable impermeability,insulativity,and stability,as well as the progressive bottom-up growth techniques to ensure fast coating on metal surface in large ***,its real anti-oxidation ability in practice is found to be unsatisfactory and nonuniform,and the main obstacle to achieving ideal anti-oxidation performance lies in unclear anti-oxidation behavior at special interface between 2D hBN and three-dimensional(3D)***,system of monolayer hBN grown on copper(Cu)foils with various lattice orientations was grown to investigate the anti-oxidation behavior of different interlayer *** using structural characterizations together with analysis of topography,we surprisingly found that stronger interlayer coupling led to worse anti-oxidation performance owing to fast diffusion of O2 through higher hBN corrugations generated at the commensurate hBN/Cu(111)*** view of this,we developed the approach of cyclic reannealing that can effectively flatten corrugations and steps,and therefore improve the anti-oxidation performance to a great *** work provides a more indepth understanding of anti-oxidation behavior of 2D materials grown on 3D metals,and a practical method to pave the way for its large-scale applications in future.

关键词： hexagonal boron nitride anti-oxidation of metals nanoscale corrugation cyclic reannealing method

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Nanodevices engineering and spin transport properties of MnBi_(2)Te_(4) monolayer

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npj Computational Materials 2021年第1期7卷 414-421页

作者： Yipeng An Kun Wang Shijing Gong Yusheng Hou Chunlan Ma Mingfu Zhu Chuanxi Zhao Tianxing Wang Shuhong Ma Heyan Wang Ruqian Wu Wuming Liu School of Physics&Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials Henan Normal UniversityXinxiangChina Department of Physics and Astronomy Mississippi State UniversityStarkvilleMSUSA Department of Chemistry Mississippi State UniversityStarkvilleMSUSA Key Laboratory of Polar Materials and Devices(MOE)&Department of Optoelectronics East China Normal UniversityShanghaiChina Department of Physics and Astronomy University of CaliforniaIrvineCAUSA School of Physics Sun Yat-Sen UniversityGuangzhouChina School of Physics and Technology Suzhou University of Science and TechnologySuzhouJiangsuChina Hebi National Lighting Co.Ltd HebiChina Siyuan Laboratory Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy MaterialsDepartment of PhysicsJinan UniversityGuangzhouChina Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijingChina

Two-dimensional(2D)magnetic materials are essential for the development of the next-generation spintronic ***,layered van der Waals(vdW)compound MnBi2Te4(MBT)has attracted great interest,and its 2D structure has been reported to host coexisting magnetism and ***,we design several conceptual nanodevices based on MBT monolayer(MBT-ML)and reveal their spin-dependent transport properties by means of the first-principles *** pn-junction diodes and sub-3-nm pin-junction field-effect transistors(FETs)show a strong rectifying effect and a spin filtering effect,with an ideality factor n close to 1 even at a reasonably high *** addition,the pip-and nin-junction FETs give an interesting negative differential resistive(NDR)*** gate voltages can tune currents through these FETs in a large ***,the MBT-ML has a strong response to *** results uncover the multifunctional nature of MBT-ML,pave the road for its applications in diverse next-generation semiconductor spin electric devices.

关键词： temperature ideality transport

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A Rapid Ear Modeling Method Based on Standard Template and Screening Algorithm for Portrait Product 2

A Rapid Ear Modeling Method Based on Standard Template and S...

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2nd International Conference on Information technology and Computer Application, ITCA 2020

作者： Wang, Mingliang Wu, Cang Li, Jialiang Duan, Fuwei Lanzhou Institute of Physics Science and Technology on Vacuum Technology and Physics Laboratory Lanzhou730000 China Lanzhou University of Technology School of Mechanical Engineering Lanzhou730050 China

ISBN: (纸本)9780738111414

In view of the low efficiency in the conventional portrait modeling, a rapid ear modeling method based on a standard template and screening algorithm for portrait product is proposed to achieve high efficiency in portrait modeling. Firstly, the normalized template of ears can be obtained by the operation of normalizing the photo of ear and standard template. Secondly, the feature edge of the ear and standard template can be extracted respectively by using a method of edge detection based on gray-scale morphology and local threshold segmenting. Afterwards registration is performed. Thirdly, the extracted feature edges are analyzed through the proposed screening algorithm, and the optimal ear model is obtained from the library of the standard template. Therefore, a final portrait model achieved by assembly the optimal ear model to the original model. Finally, a case study of applying the proposed methodology to a personalized portrait product modeling demonstrates the feasibility and effectiveness of the proposed method. © 2020 IEEE.

关键词： Efficiency

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Editorial: The roles of self-organization and sensory adaptation for locomotion in animals and robots

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Frontiers in Neurorobotics 2024年 18卷 1372772页

作者： Sándor, Bulcsú Gros, Claudius Manoonpong, Poramate Department of Physics Babes-Bolyai University Cluj-Napoca Romania Institute for Theoretical Physics Goethe University Frankfurt Frankfurt am Main Germany Bio-inspired Robotics and Neural Engineering Lab School of Information Science and Technology Vidyasirimedhi Institute of Science and Technology Rayong Thailand Embodied Artificial Intelligence and Neurorobotics Lab SDU Biorobotics The Mærsk Mc-Kinney Møller Institute University of Southern Denmark Odense Denmark

Editorial on the Research Topic The roles of self-organization and sensory adaptation for locomotion in animals and robots 1 Introduction Self-organization is the emergence of a global spatial or dynamical pattern in a system with interacting components governed by simple local rules (Gros, 2015). The investigated leg and body coordination strategies include (i) the local leg and body coordination at the segment level (LCS) in a manner similar to millipedes, simultaneous leg amplitude reduction in response to different turning directions (SAR, like insects), and the global phase reversal of legs inside of turning curve (GPR, typical engineering approach). While Wang et al. mostly focus on variants of particle swarm optimization algorithms, various bio-inspired heuristic optimization methods are also discussed together with the active challenges of robot olfaction research. 3 Concluding remarks The present Research Topic brings together studies focusing on different aspects of self-organized locomotion starting from the role of load feedback signals, through bio-inspired control strategies for intra- and inter-leg coordination, biologically realistic neural networks for obstacle avoidance and maze navigation tasks, to odor source localization by swarms. Conflict of interest The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

关键词： robotic locomotion motion patterns swarms of robots control and learning algorithms sensory feedback loop

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Diffusion-activated high performance ZnSnO/Yb_(2)O_(3) thin film transistors and application in low-voltage-operated logic circuits

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Journal of Materials science & technology 2021年第11期70卷 49-58页

作者： Bing Yang Gang He Wenhao Wang Yongchun Zhang Chong Zhang Yufeng Xia Xiaofen Xu School of Physics and Materials Science Radiation Detection Materials&Devices LabAnhui UniversityHefei 230601China Institute of Physical Science and Information Technology Anhui UniversityHefei 230601China School of Mechanical Engineering Anhui Vocational and Technical CollegeHefei 230011China

The flourishing metal-oxide high-k dielectric materials have been regarded as the vital components of low voltage operated flexible transparent electronic *** herein report that ytterbium oxide(Yb_(2)O_(3))and ZnSnO(ZTO)thin films were firstly integrated into ZTO-based thin film transistors(TFTs)with superior *** have indicated that the 500℃-annealed ZTO/Yb_(2)O_(3) TFTs possess the large saturation mobility of 9.1 cm^(2) V-1S^(-1) and the high on/off current ratio of 2.15×10^(7),which even surpass those of reported In-based *** deteriorative electrical properties in the aging process can be attributed to the carrier capture ***,the 460℃-processed TFTs demonstrate a tenfold increase in saturated mobility and an increase in on/off current ratio after 10 days *** inspiring electrical properties are attributed to the diffusion-activated carrier enhancement mechanism and electrons donor role of water molecular,which introduces a facile method to boost the device performance at lower processing *** neglected threshold voltage variations of 0.06 V and-0.2V have been detected after bias stability *** superior bias stability can be attributed to the charge delay effect induced by the continuous electric ***,the ultrahigh on/off current ratio of 1.1×10^(7) and the recoverable transferring performance have verified the aging-activated *** confirm its potential application in digital circuits,a resistor-loaded inverter with gain of 5.6 has been constructed and good dynamic response behavior have been detected at a low voltage of *** a result,it can be concluded that the high temperature annealing TFTs need immediate encapsulation,while the performance of the lower temperature processing samples can be optimized after aging treatment,indicating the potential prospect in low power consumption large-scale flexible transparent devices.

关键词： Ytterbium oxide(Yb_(2)O_(3)) Thin-film transistors(TFTs) Diffusion-activated Bias stability Inverter

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Aerodynamic parameter identification of projectiles optimized by improved sparrow search algorithm based kernel extreme learning machine

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Journal of Electronic Measurement and Instrumentation 2025年第2期39卷 72-82页

作者： Gao, Zhanpeng Yi, Wenjun National Key Lab of Transient Physics Nanjing University of Science and Technology Nanjing210094 China

The aerodynamic parameters of a projectile directly affect its flight trajectory, which in turn determines the missile’s design and performance evaluation. Due to the complex aerodynamic environment and the interactions between aerodynamic parameters during high-speed flight, accurately identifying these parameters is a challenging problem. To address this, this paper proposes a combined model using the sparrow search algorithm and kernel extreme learning machine to identify the projectile’s aerodynamic parameters. In order to fully exploit the performance of the SSA and improve identification accuracy, improvements are made to the initialization strategy, convergence factor, and position update strategy of the SSA. The effectiveness of these improvements is validated using the CEC2022 benchmark functions for the improved sparrow search algorithm. Furthermore, the ISSA is employed to optimize the kernel parameters and regularization coefficients of the KELM, leading to the proposed ISSA-KELM identification model. The results show that using the basic extreme learning machine algorithm yields the lowest identification accuracy and fails to capture the nonlinear characteristics of the aerodynamic parameters in certain regions. By introducing a kernel function into the ELM, the KELM method improves identification accuracy by 1 to 4 orders of magnitude. While the KELM and SSA-KELM models still exhibit some discrepancies from the true values in nonlinear regions, the ISSA-KELM model provides the most accurate results, improving accuracy by approximately 4 to 5 orders of magnitude compared to the basic ELM algorithm. This research offers reliable technical support for precise flight trajectory prediction and missile performance optimization. © 2025 Editorial Office of EMI Journal. All rights reserved.

关键词： Learning algorithms

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Promoting ion adsorption and desolvation kinetics enables high capacity and rate capability of stibium anode for advanced alkaline battery

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Journal of Materials science & technology 2022年第36期131卷 60-67页

作者： Peng Zhang Jinhao Xie Fan Yang Xin Shi Yanxia Yu Xihong Lu College of Materials Science and Engineering Guangdong Provincial Engineering Technology Research Center of Key Material for High Performance Copper Clad LaminateDongguan Cleaner Production CenterDongguan University of TechnologyDongguan 523808China MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry The Key Lab of Low-carbon Chem and Energy Conservation of Guangdong ProvinceSchool of ChemistrySun Yat-Sen UniversityGuangzhou 510275China School of Applied Physics and Materials Wuyi UniversityJiangmen 529020China

Stibium(Sb)metal with high theoretic capacity,suitable negative working window and inexpensive nature are promising anode material for advanced aqueous alkaline batteries(AABs).However,the further development of Sb anode is severely hindered by the low capacity and poor rate capability which is originated from deficient adsorption of[Sb(OH)_(4)]^(-)and its sluggish desolvation ***,a nitrogen doped carbon cages(NCCs)substrate is constructed as high capacity and rate capability anode by promoting the adsorption and following desolvation process of[Sb(OH)_(4)]^(-)via the enhanced attraction toward(OH)-in the solvated[Sb(OH)_(4)]^(-).Consequently,the designed Sb/NCCs anode delivers a high capacity of 627 m Ah g^(-1)with an average 95%Sb utilization,an outstanding coulombic efficiency(CE)of 95%and an impressive lifespan(>110 h).Meanwhile,the Ni_(3)Se_(2)//Sb/NCCs batteries show great capacity retention of 86.7%after 2000 cycles with an areal capacity of 0.52 m Ah cm^(-2).Implementation of the designed anode allows for the construction of Sb-based AABs with enhanced rate capability,energy density and cycling performance.

关键词： Aqueous alkaline batteries Stibium anode N-doped carbon Ion adsorption Desolvation kinetics

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