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Soliton formation and spectral translation into visible on CMOS-compatible 4H-silicon-carbide-oninsulator platform

Light(Science & Applications) 2022年第12期11卷 3059-3068页

作者： Chengli Wang Jin Li Ailun Yi Zhiwei Fang Liping Zhou Zhe Wang Rui Niu Yang Chen Jiaxiang Zhang Ya Cheng Junqiu Liu Chun-Hua Dong Xin Ou State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of Sciences200050 ShanghaiChina The Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences100049 BeijingChina CAS Key Laboratory of Quantum Information University of Science and Technology of China230026 HefeiChina CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of China230026 HefeiChina The Extreme Optoelectromechanics Laboratory(XXL) School of Physics and Electronic ScienceEast China Normal University200241 ShanghaiChina State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultraintense Laser Science Shanghai Institute of Optics and Fine MechanicsChinese Academy of Sciences201800 ShanghaiChina International Quantum Academy 518048 ShenzhenChina Hefei National Laboratory University of Science and Technology of ChinaHefei 230026China

Recent advancements in integrated soliton microcombs open the route to a wide range of chip-based communication,sensing,and metrology *** technology translation from laboratory demonstrations to real-world applications requires the fabrication process of photonics chips to be fully CMOS-compatible,such that the manufacturing can take advantage of the ongoing evolution of semiconductor technology at reduced cost and with high *** nitride has become the leading CMOS platform for integrated soliton devices,however,it is an insulator and lacks intrinsic second-order nonlinearity for electro-optic *** materials have emerged such as AlN,LiNbO_(3),AlGaAs and GaP that exhibit simultaneous second-and third-order ***,we show that silicon carbide(SiC)--already commercially deployed in nearly ubiquitous electrical power devices such as RF electronics,MOSFET,and MEMS due to its wide bandgap properties,excellent mechanical properties,piezoelectricity and chemical inertia--is a new competitive CMOS-compatible platform for nonlinear ***-quality-factor microresonators(Q=4×10^(6))are fabricated on 4H-SiC-on-insulator thin films,where a single soliton microcomb is *** addition,we observe wide spectral translation of chaotic microcombs from near-infrared to visible due to the second-order nonlinearity of *** work highlights the prospects of SiC for future low-loss integrated nonlinear and quantum photonics that could harness electro-opto-mechanical interactions on a monolithic platform.

关键词： soliton visible insulator

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Avalanche Breakdown Mechanism Analysis of Sic Mosfet Regions in Off-State

SSRN

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SSRN 2023年

作者： Feng, Junhong Zheng, Li Cheng, Xinhong Yu, Yuehui Liu, Shaoyu Zhou, Xuetong Tian, Yufei Wang, Da State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai200050 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing100049 China

Before the avalanche, the main leakage current is composed of the generating current at p+/n- junction under the source. From Point A to B, leakage current increases , coming from impact ionization induced electrons current at p/n- junction under transition between active region and termination region. After Point B, with the increase of electrons injected into n- drift region, the electrons accumulation at n-drift/n+-substrate and the shrinkage of the depletion width will happen, a snapback phenomenon appears. Impact ionization generated holes accumulated in the p-body under n+-source region induced the barrier height at n+/p-body interface decrease to 0.13eV, and punch through current of electrons from n+-source to n- drift *** high lattice temperature of 1450K makes the inversion layer of electrons appear forming the channel current. The parasitic NPN is not considered to be triggered for no continuous hole current injects into p-body. The termination region structure determined the avalanche breakdown voltage, and the active region decides the snapback current. © 2023, The Authors. All rights reserved.

关键词： Impact ionization

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A highly stable Mn-based cathode with low crystallinity Li2MnO3 and spinel functional units for lithium-ion batteries

EES Batteries

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EES Batteries 2025年第1期1卷 185-194页

作者： Shiqi Liu Yinzhong Wang Dongdong Xiao Haifeng Li Tianhao Wu Boya Wang Guangxing Hu Lingqiao Wu Yulong Wang Guoqing Wang Nian Zhang Haijun Yu Institute of Advanced Battery Materials and Devices College of Materials Science and Engineering Beijing University of Technology Beijing 100124 China Key Laboratory of Advanced Functional Materials Ministry of Education Beijing University of Technology Beijing 100124 China Institute of Matter Science Beijing University of Technology Beijing 100124 China Beijing Create Energy & Benefit Future Co. Ltd Beijing 100176 China Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai 200050 People's Republic of China

Mn-based oxide cathodes have emerged as potentially feasible cathode materials for high-specific-energy Li-ion batteries due to their cost-efficiency and exceptionally high capacity via the concomitant cationic and anionic redox reactions. However, their practical implementation is still challenging since the trade-off between the electrochemical behaviours and structural stability hinders them from realizing the coinstantaneous high capacity and lifespan. Herein, a structural and crystalline design is introduced into Li_0.67Li_0.2[Mn_0.8Ni_0.2]_0.8O₂, presenting low crystallinity layered Li₂MnO₃ and pre-introduced high-voltage spinel intergrown functional units in the Mn-based composite-structure oxide cathode. This scenario shows no capacity decay within the high-voltage cycling up to 5.0 volt versus Li/Li⁺, a high energy density of 870 W h kg⁻¹, a low-strain behaviour, and high lithium mobility for high cycling rates. This study provides a solid perspective on the design of Mn-based cathode materials by incorporating distinct functional units and tailoring their configurations, which is conducive to facilitating prolonged Li intercalation chemistry.

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Investigations on ion implantation-induced strain in rotated Y-cut LiNbO_(3) and LiTaO_(3)

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Chinese Physics B 2021年第10期30卷 79-84页

作者： Zhongxu Li Kai Huang Yanda Ji Yang Chen Xiaomeng Zhao Min Zhou Tiangui You Shibin Zhang Xin Ou State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of Sciences(CAS)Shanghai 200050China MIIT Key Laboratory of Aerospace Information Materials and Physics&College of Science Nanjing University of Aeronautics and AstronauticsNanjing 211106China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Shanghai Novel Silicon Integration Technology Co. Ltd.JiadingShanghaiChina

The monocrystalline LiNbO_(3)(LN)and LiTaO_(3)(LT)plates have been qualified as a kind of material platform for high performance RF filter that is considerable for the 5G *** and LT thin films are usually transferred on handle wafers by combining ion-slicing and wafer bonding technique to form a piezoelectric on insulator(POI)*** ion implantation is a key process and the implantation-induced strain is essential for the layer ***,we reported the strain profile of ion implanted rotated Y-cut LN and *** ion implantation generates the out-of-plane tensile strain of the sample surface and(006)plane,while both the tensile and compressive strain are observed on the(030)*** implanted ions redistributed due to the anisotropy of LN and LT,and induce the main tensile normal to the(006)***,the(030)planes are contracted due to the Poisson effect with the interstitial ions disturbing and mainly show a compressive strain profile.

关键词： x-ray diffraction(XRD) implantation strain piezoelectric

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Reliability Modelling and Prediction Method for Phase Change Memory Using Optimal Pulse Conditions

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Journal of Shanghai Jiaotong university(Science) 2020年第1期25卷 1-9页

作者： YAN Shuai CAI Daolin CHEN Yifeng XUE Yuan LIU Yuanguang WU Lei SONG Zhitang State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China University of Chinese Academy of Sciences Beijing 100049China

Phase change memory(PCM)has reached the level of mass *** first step in mass production is determining the proper pulse conditions of high-resistance(HR)and low-resistance(LR)states to realize the best performance of PCM chips on the basis of longer endurance ***,due to the neglect of each of the relations as well as the square term of each relationship for pulse conditions,the standard screening method for pulse conditions cannot accurately det ermine the optimal pulse conditions.A new statistical prediction method based on regression analysis is presented in this *** method can model and predict the optimal pulse conditions of PCM chips on the basis of longer endurance *** the method,the parameter est imates,model equations and surface plot are genera ted by the least-mean-square(LMS)method for the regression analysis;the prediction model is established by monitoring the distributions of the resistance values collected from a 4 Kbit block of the 4 Mbit PCM test chips in 40 nm complementary metal oxide semiconductor(CMOS)process.

关键词： phase change memory(PCM) prediction model regression analysis pulse conditions

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Single-Flux-Quantum-Activated Controlled-Z Gate for Transmon Qubits

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Physical Review Applied 2023年第4期19卷 044031-044031页

作者： Y.F. Wang W.P. Gao K. Liu B. Ji Z. Wang Z.R. Lin State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai 200050 China CAS Center for Excellence in Superconducting Electronics 865 Changning Rd. Shanghai 200050 China ShanghaiTech University Shanghai 201210 China University of Chinese Academy of Sciences Beijing 100049 China

Single-flux-quantum (SFQ) digital circuitry has great potential in building a scalable control system of superconducting qubits. In this work, we describe a practical SFQ-based two-qubit gate for transmon qubits. The controlled-Z (CZ) gate is activated by near-resonant SFQ-pulse trains near the target transition involving the second excited state. Numerical simulations show that the fidelity of a SFQ-activated CZ gate in excess of 99.9% is achievable within 100-ns gate time. We evaluate the CZ gate error caused by leakage and SFQ-pulse width. Combined with the proposed feasible expansion methods, this work is a supplement to the scalable and integratable superconducting-qubit control system based on SFQ digital logic.

关键词： Cryogenic technology Optoelectronics Quantum control Quantum gates Quantum information with solid state qubits Superconducting qubits Microwave techniques

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Direct observation of hydration of a Nafion membrane using APXPS and AIMD simulation

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Journal of Chemical Physics 2023年第7期158卷 071101-071101页

作者： Liu, Chiyan Liu, Jian Han, Yong Wang, Zhangrui Zhang, Hui Xie, Xiaoming Yang, Bo Liu, Zhi State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai200050 China University of Chinese Academy of Sciences Beijing100049 China School of Physical Science and Technology ShanghaiTech University Shanghai201210 China Center for Transformative Science ShanghaiTech University Shanghai201210 China

The hydration of perfluorinated sulfonic-acid ionomers is the most important phenomenon that determines their transport and electrical properties. To bridge the gap between the macroscopic electrical properties and the microscopic water-uptake mechanism, we investigated the hydration process of a Nafion membrane using ambient-pressure x-ray photoelectron spectroscopy (APXPS) from vacuum up to ∼90% relative humidity at room temperature. The O 1s and S 1s spectra provided a quantitative analysis of the water content (λ) and the transformation of the sulfonic acid group (-SO3H) to its deprotonated type (-SO3-) during the water-uptake process. Taking advantage of a specially designed two-electrode cell, the conductivity of the membrane was determined by electrochemical impedance spectroscopy before APXPS measurements with the same conditions, thereby establishing the connection between the electrical properties and the microscopic mechanism. By means of ab initio molecular dynamics simulations based on density functional theory, the core-level binding energies of O- and S-containing species in the Nafion + H2O system were obtained. © 2023 Author(s).

关键词： Hydration

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Nondestructive visualization of graphene on Pt with methylene blue surface modification

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Science China Materials 2022年第10期65卷 2763-2770页

作者： He Kang Yanhui Zhang Yun Wu Shike Hu Jing Li Zhiying Chen Yanping Sui Shuang Wang Sunwen Zhao Runhan Xiao Guanghui Yu Songang Peng Zhi Jin Xinyu Liu State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Science and Technology on Monolithic Integrated Circuits and Modules Laboratory Nanjing Electronic Device InstituteNanjing 210016China Microwave Devices and Integrated Circuits Department Institute of MicroelectronicsChinese Academy of SciencesBeijing 100029China

Efficient large-scale nondestructive quality assessment of graphene on Pt is essential to the in-depth growth research and practical applications of ***,we present a very simple method for directly observing the domains and defects in graphene on Pt using an ordinary optical *** was achieved by modifying graphene on Pt using methylene blue(MB).Because the chemical activities of graphene and Pt surface differ significantly,the adsorption and reaction of MB on graphene and platinum surface *** can determine the distribution of graphene crystal domains and defects by comparing the colors in the optical *** addition,this characterization method causes no obvious damage to the Pt substrate and ***,it does not affect the recycling of the substrate or the subsequent characterization or application of *** study provides a nondestructive method for measuring the quality of graphene on Pt on a large scale,as well as a reference for the characterization and doping of other two-dimensional materials.

关键词： graphene Pt nondestructive visualization surface modification methylene blue

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Surface charge induced flat band splitting in kagome lattice CsTi3Bi5

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Physical Review B 2025年第20期111卷 205134-205134页

作者： Wenchuan Jing Zhengtai Liu Zhicheng Jiang Haiyang Ma Wei Xia Jishan Liu Yichen Yang Jianyang Ding Jiayu Liu Yu Huang Yuming Shi Xun Ma Mao Ye Yanfeng Guo Dawei Shen State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai 200050 China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai 201210 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049 China Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai 200050 China National Synchrotron Radiation Laboratory University of Science and Technology of China 42 South Hezuohua Road Hefei Anhui 230029 China Quantum Science Center of Guangdong-HongKong-Macao Greater Bay Area Shenzhen 518045 China School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China ShanghaiTech Laboratory for Topological Physics ShanghaiTech University Shanghai 201210 China

Kagome lattices, characterized by unique band structures such as flat bands and van Hove singularities, serve as a compelling platform for exploring the interplay between electronic states such as charge density waves, superconductivity, and topological quantum phenomena. In this study, we employed high-resolution angle-resolved photoemission spectroscopy and first-principles calculations to systematically characterize the distinct surface terminations of cleaved single-crystal CsTi3Bi5 and elucidate their corresponding band structures, providing critical insights into their intrinsic electronic states. Our findings reveal a pronounced splitting of flat bands on Bi-terminated surfaces, which is absent on Cs-terminated surfaces, indicating distinct surface electronic environments. Notably, the coexistence of original and replicated flat bands points to intricate interfacial interactions, potentially involving phenomena such as charge order, localized orbital hybridization, or surface reconstruction, rather than a straightforward rigid band shift. We find this behavior is attributed to a localized charge-driven hole doping effect at the interface, as supported by theoretical simulations and the observed modulation in band dispersions. These insights deepen our understanding of electronic structure modulation in kagome materials, paving the way for targeted band engineering and the investigation of emergent quantum phenomena such as unconventional superconductivity and topological orders.

关键词： Photoelectron spectroscopy

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Titanium carbide nanosheets with defect structure for photothermal-enhanced sonodynamic therapy

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Bioactive Materials 2022年第2期7卷 409-419页

作者： Guangqiang Li Xiaoyan Zhong Xianwen Wang Fei Gong Huali Lei Yangkai Zhou Chengfei Li Zhidong Xiao Guoxi Ren Liang Zhang Zhiqiang Dong Zhuang Liu Liang Cheng College of Science State Key Laboratory of Agricultural MicrobiologyHuazhong Agricultural UniversityWuhan430070China Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou215123China Department of Toxicology School of Public HealthMedical College of Soochow UniversitySuzhou215123China State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai200050China College of Biomedicine and Health College of Life Science and TechnologyHuazhong Agricultural UniversityWuhanHubei430070China

Sonodynamic therapy(SDT)has attracted widespread interest in biomedicine,owing to its novel and noninvasive therapeutic method triggered by ultrasound(US).Herein,the Ti_(3)C_(2) MXene nanosheets(Ti_(3)C_(2) NSs)are developed as good sonosensitizers via a two-step method of chemical exfoliation and high-temperature *** the high-temperature treatment,the oxygen defect of Ti_(3)C_(2) MXene nanosheets(H-Ti_(3)C_(2) NSs)is greatly ***,the electron(e^(-))and hole(h^(+))generated by US can be separated faster due to the improved degree of oxidation,and then the recombination of e^(-)-h^(+)can be prevented with the abundant oxygen defect under US irradiation,which induced the sonodynamic efficiency greatly to improve around 3.7-fold compared with Ti_(3)C_(2) NSs without high-temperature *** PEGylation,the H-Ti_(3)C_(2)-PEG NSs show good stability and *** vitro studies exhibit that the inherent property of mild photothermal effect can promote the endocytosis of H-Ti_(3)C_(2)-PEG NSs,which can improve the SDT *** vivo studies further display that the increased blood supply by the mild photothermal effect can significantly relieve hypoxia in the tumor microenvironment,showing photothermal therapy(PTT)enhanced *** importantly,the H-Ti_(3)C_(2)-PEG NSs can be biodegraded and excreted out of the body,showing no significant long-term *** work develops the defective H-Ti_(3)C_(2) NSs as high-efficiency and safe sonosensitizers for photothermal-enhanced SDT of cancer,extending the biomedical application of MXene-based nanoplatforms.

关键词： Ti_(3)C_(2)MXenes Oxygen defect Sonosensitizers Sonodynamic therapy Biosafety

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