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Passively stable 0.7-octave microcombs in thin-film lithium niobate microresonators

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Chinese Optics Letters 2024年第5期22卷 53-56页

作者：赵泽兴王晨宇邱静远叶志霖尹志军王振林贾琨鹏田晓慧谢臻达祝世宁 National Laboratory of Solid State Microstructures School of Electronic Science and EngineeringSchool of PhysicsCollege of Engineering and Applied Sciencesand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China Nanzhi Institute of Advanced Optoelectronic Integration Technology Co. Ltd.Nanjing 210093China

The optical frequency comb based on microresonators(microcombs)is an integrated coherent light source and has the potential to promise a high-precision frequency standard;self-reference and a long-term stable microcomb are the keys to this ***,we demonstrated a 0.7-octave spectrum Kerr comb via dispersion engineering in a thin-film lithium niobate microresonator,and the single-soliton state can be accessed passively with long-term stability over 3 *** such a robust broadband coherent comb source using thin-film lithium niobate,a fully stabilized microcomb can be expected for massive practical applications.

关键词： thin-film lithium niobate soliton microcomb photorefractive effect

Dissipative soliton generation and real-time dynamics in microresonator-filtered fiber lasers

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Light(Science & Applications) 2022年第11期11卷 2676-2686页

作者： Mingming Nie Bowen Li kunpeng jia Yjun Xie Jingjie Yan Shining Zhu Zhenda Xie Shu-Wei Huang Department of Electrial Computer and Energy EngineeringUniversity of Colorado BoulderBoulderColorado 80309USA School of Electronic Science and Engineering National Laboratory of Solid State MicrostructuresCollege of Engineering and Applied SciencesSchool of Physicsand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China

Optical frequency combs in microresonators(microcombs)have a wide range of applications in science and technology,due to its compact size and access to considerably larger comb *** recent successes,the problems of self-starting,high mode efficiency as well as high output power have not been fully addressed for conventional soliton *** demonstration of laser cavity soliton microcombs by nesting a microresonator into a fiber cavity,shows great potential to solve the *** we study the dissipative soliton generation and interaction dynamics in a microresonator-fltered fiber laser in both theory and *** bring theoretical insight into the mode-locking principle,discuss the parameters effect on soliton properties,and provide experimental guidelines for broadband soliton *** predict chirped bright dissipative soliton with flat-top spectral envelope in microresonators with normal dispersion,which is fundamentally forbidden for the externally driven ***,we experimentally achieve soliton microcombs with large bandwidth of~10 nm and high mode efficiency of 90.7%.Finally,by taking advantage of an ultrahigh-speed time magnifier,we study the real-time soliton formation and interaction dynamics and experimentally observe soliton Newton's *** study will benefit the design of the novel,high-efficiency and self-starting microcombs for real-world applications.

关键词： resonator fiber soliton

X射线荧光分析仪检测数据超差原因分析及解决措施

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水泥技术 2024年第4期 84-88页

作者：贾坤鹏时耀辉于洪存杜会平赵兴娟赞皇金隅水泥有限公司河北石家庄051230

某水泥公司采用X射线荧光分析仪进行生料样品SiO_(2)、CaO等成分检测时,出现检测数据频繁超出误差的现象。分析了可能造成X射线荧光分析仪检测数据产生误差的影响因素,试验排除了操作误差及仪器误差的影响,发现检测数据超差的主要原因... 详细信息

某水泥公司采用X射线荧光分析仪进行生料样品SiO_(2)、CaO等成分检测时,出现检测数据频繁超出误差的现象。分析了可能造成X射线荧光分析仪检测数据产生误差的影响因素,试验排除了操作误差及仪器误差的影响,发现检测数据超差的主要原因是试样制备方法重复性较差,进一步排查影响试样制备的因素,确定了颗粒效应对检测数据超差的影响。通过采取将样品研磨至完全通过0.08mm方孔筛的粉磨试验方案,最终解决了X射线荧光分析仪超差的问题,提高了熟料产品质量。

关键词：荧光分析仪检测分析样品制备解决措施

Electrically controllable laser frequency combs in graphene-fibre microresonators

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Light(Science & Applications) 2020年第1期9卷 220-228页

作者： Chenye Qin kunpeng jia Qianyuan Li Teng Tan Xiaohan Wang Yanhong Guo Shu-Wei Huang Yuan Liu Shining Zhu Zhenda Xie Yunjiang Rao Baicheng Yao Key Laboratory of Optical Fibre Sensing and Communications(Education Ministry of China) University of Electronic Science and Technology of ChinaChengduChina National Laboratory of Solid State Microstructures and School of Electronic Science and EngineeringSchool of Physics and College of Engineering and Applied SciencesNanjing UniversityNanjingChina Department of Electrical Computerand Energy EngineeringUniversity of Colorado BoulderBoulderCO 80309USA Key Laboratory for Micro-Nano Optoelectronic Devices(Education Ministry of China) School of Physics and ElectronicsHunan UniversityChangshaChina Research Centre for Optical Fibre Sensing Zhejiang LaboratoryHangzhouChina

Laser frequency combs emitting ultrafast pulses of light,at equidistantly discrete frequencies,are cornerstones of modern information *** recent years,the generation of soliton combs in microcavities with ultrahighquality factors has established microcombs as out-oflaboratory ***,the material and geometry of a laser cavity,which determine comb formation,are difficult to electrically *** dynamic control can further enrich the diversity of comb outputs and help to actively stabilize them.

关键词： laser frequency fibre

Improved performance of MoS_(2)FET by in situ NH_(3)doping in ALD Al_(2)O_(3)dielectric

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Chinese Physics B 2022年第7期31卷 560-564页

作者： Xiaoting Sun Yadong Zhang kunpeng jia Guoliang Tian jiahan Yu Jinjuan Xiang Ruixia Yang Zhenhua Wu Huaxiang Yin School of Information Engineering Hebei University of TechnologyTianjin 300401China Key Laboratory of Microelectronics Device and Integrated Technology Institute of Microelectronics Chinese Academy of SciencesBeijing 100029China University of Chinese Academy of Sciences Beijing 100049China

Since defects such as traps and oxygen vacancies exist in dielectrics,it is difficult to fabricate a high-performance MoS_(2)field-effect transistor(FET)using atomic layer deposition(ALD)Al_(2)O_(3)as the gate dielectric *** this paper,NH_(3)in situ doping,a process treatment approach during ALD growth of Al_(2)O_(3),is used to decrease these defects for better device ***_(2)FET has been well fabricated with this technique and the effect of different NH_(3)in situ doping sequences in the growth cycle has been investigated in *** with counterparts,those devices with NH_(3)in situ doping demonstrate obvious performance enhancements:Ion/Ioff is improved by one order of magnitude,from 1.33×10^(5)to 3.56×10^(6),the threshold voltage shifts from-0.74 V to-0.12 V and a small subthreshold swing of 105 m V/dec is *** improved MoS_(2)FET performance is attributed to nitrogen doping by the introduction of NH_(3)during the Al_(2)O_(3)ALD growth process,which leads to a reduction in the surface roughness of the dielectric layer and the repair of oxygen vacancies in the Al_(2)O_(3)***,the MoS_(2)FET processed by in situ NH_(3)doping after the Al and O precursor filling cycles demonstrates the best performance;this may be because the final NH_(3)doping after film growth restores more oxygen vacancies to screen more charge scattering in the MoS_(2)*** reported method provides a promising way to reduce charge scattering in carrier transport for high-performance MoS_(2)devices.

关键词： MoS_(2) Al_(2)O_(3)dielectric NH_(3)in-situ doping oxygen vacancy

Fabrication of dense SiBCN monolith at a lower temperature and its high-temperature performance

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Journal of Advanced Ceramics 2024年第8期13卷 1198-1211页

作者： Zi-Bo Niu Daxin Li Dechang jia Zhihua Yang kunpeng Lin Yan Wang Paolo Colombo Ralf Riedel Yu Zhou Institute for Advanced Ceramics School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150080China Key Laboratory of Advanced Structural-Function Integrated Materials and Green Manufacturing Technology Ministry of Industry and Information TechnologyHarbin 150080China State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150080China Department of Industrial Engineering University of PadovaPadova 3513iItaly Department of Materials Science and Engineering The Pennsylvania State UniversityUniversity Park 16802USA Institute of Materials Science Darmstadt University of TechnologyDarmstadt 64287Germany School of Materials Science and Engineering Harbin Institute of Technology(Shenzhen)Shenzhen 518055China

In this study,a crack-free pyrolysis process of partially cured precursor powder compacts was developed to prepare dense silicon boron carbonitride(SiBCN)monoliths at much lower temperatures(1300℃),thereby circumventing the challenges of sintering densification(>1800℃).Unlike the elastic fracture in over-cured precursors or the viscoelastic deformation in under-cured precursors,the partially cured precursor,exhibiting elastic-plastic deformation behavior,facilitates limited nanoscale pore formation in a dense structure,achieving a balance between crack-free pyrolysis and *** to SiBCN derived from the over-cured precursor(σ=~159 MPa,K_(IC)=1.9 MPa:m^(1/2),Vickers hardness(HV)=7.8 GPa,and E=122 GPa),the resulting SiBCN monolith exhibited significantly improved mechanical properties(σ=~304 MPa,K_(IC)=3.7 MPa-m12,HV=10.6 GPa,and E=161 GPa)and oxidation *** addition,this study investigated the high-temperature performance of SiBCN monoliths,including crystallization and oxidation,and determined the oxidation kinetics induced by pore structure healing and the different oxidation mechanisms of Si-C-N and B-C-N clusters in the amorphous *** to its unique composition and structure,the SiBCN ceramic oxide layer exhibits exceptional self-healing effects on repairing the nanoporous system in the initial stage and shows outstanding high-temperature stability during prolonged oxidation,mitigating adverse effects from bubble formation and *** to the nanoporous structure,the oxidation rate is initially controlled by gas diffusion following a linear law before transitioning to oxide layer diffusion characterized by a parabolic ***,due to different valence bond configurations,Si-C-N transforms into an amorphous SiCNO structure after phase separation,unlike the nucleation and growth of residual B-N-C.

关键词： silicon boron carbonitride(SiBCN)ceramics crack-free pyrolysis amorphous structure oxidation mechanisms kinetic law

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韩非“法术势并用说”驳论

河南师范大学学报（哲学社会科学版） 2018年第2期45卷 77-84页

作者：贾坤鹏南开大学历史学院天津300350

"法术势并用说"是韩非思想研究的主流观点。它创始于冯友兰,发展于民国,兴盛于现代学术界。然而,"法术势并用说"于韩非著作缺乏文献依据,并非韩非本人的观点,而是后人之发明。造成此说的直接原因是对文献的误读和剪裁。事实上,韩非主张... 详细信息

"法术势并用说"是韩非思想研究的主流观点。它创始于冯友兰,发展于民国,兴盛于现代学术界。然而,"法术势并用说"于韩非著作缺乏文献依据,并非韩非本人的观点,而是后人之发明。造成此说的直接原因是对文献的误读和剪裁。事实上,韩非主张的"任势",就是主张运用"法术"、"赏罚"、"毁誉"。韩非虽然肯定了"势"的重要性,但却否定了"势"的独立性。君主之所以能够善于用势,是因为他善于运用"法术"、"赏罚"、"毁誉"等,离开这些,就无所谓处势、任势。进一步说,基于"法术势并用说"的"法术势核心说"亦难成立。"法术势"理论在创立之初便在研究方法、研究材料、研究内容上存在未经充分论证的预设。总之,韩非思想是"法术并用"而非"法术势并用",其核心是"法术"而非"法术势"。

关键词：法术势法术势并用韩非冯友兰

Suppressing FXR promotes antiviral effects of bile acids via enhancing the interferon transcription

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Acta Pharmaceutica Sinica B 2024年第8期14卷 3513-3527页

作者： Xue Liang kunpeng Liu Xin jia Cuiqin Cheng Meiqi Zhang Lingdong Kong Qiqi Li Zhe Liu Min Li Junliang Li Yao Wang Anlong Xu School of Life Sciences Beijing University of Chinese MedicineBeijing 100029China Guangxi Key Laboratory of Special Biomedicine School of MedicineGuangxi UniversityNanning 530004China Beijing Academy of Traditional Chinese Medicine Beijing University of Chinese MedicineBeijing 100029China Beijing Research Institute of Chinese Medicine Beijing University of Chinese MedicineBeijing 100029China

Bile acids(BAs)are natural metabolites in mammals and have the potential to function as drugs against viral ***,the limited understanding of chenodeoxycholic acid(CDCA)receptors and downstream signaling,along with its lower suppression efficiency in inhibiting virus infection limits its clinical *** this study,we demonstrate that farnesoid X receptor(FXR),the receptor of CDCA,negatively regulates interferon signaling,thereby contributing to the reduced effectiveness of CDCA against virus *** deficiency or pharmacological inhibition enhances interferon signaling activation to suppress virus ***,FXR impairs the DNA binding and transcriptional abilities of activated interferon regulatory factor 3(IRF3)through *** IRF3 transcriptional activity by FXReIRF3 interaction significantly undermines the expression of Interferon Beta 1(IFNB1)and the antiviral response of cells,especially upon the CDCA *** FXR-deficient cells,or when combined with Z-guggulsterone(GUGG)treatment,CDCA exhibits a more potent ability to restrict virus ***,these findings suggest that FXR serves as a limiting factor for CDCA in inhibiting virus replication,which can be attributed to the“signaling-brake”roles of FXR in interferon *** FXR inhibition represents a promising pharmaceutical strategy for the clinical application of BAs metabolites as antiviral drugs.

关键词： Bile acids FXR IRF3 Interferon transcription RNA virus Z-guggulsterone Broad-spectrum antiviral activity Synergistic inhibitory effect

产业结构升级如何影响区域经济增长?--基于金融集聚异质性视角的解释

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管理现代化 2021年第5期41卷 29-32页

作者：刘峰贾昆鹏合肥工业大学经济学院安徽合肥230601

基于我国2008—2018年省级面板数据,实证检验了不同金融集聚程度下,产业结构升级对区域经济增长的影响。以金融集聚为门槛变量,用汉森门槛模型来研究产业结构升级对区域经济增长的影响机制。发现,在不同的金融集聚门槛区间内,产业结构... 详细信息

基于我国2008—2018年省级面板数据,实证检验了不同金融集聚程度下,产业结构升级对区域经济增长的影响。以金融集聚为门槛变量,用汉森门槛模型来研究产业结构升级对区域经济增长的影响机制。发现,在不同的金融集聚门槛区间内,产业结构升级对区域经济增长的估计系数不同,这说明尽管产业结构升级会促进区域经济增长,其促进程度会受到金融集聚水平的影响,在使用不同样本和不同方法进行检验后,结果仍保持稳健。

关键词：金融集聚异质性产业结构升级区域经济增长门槛模型