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Saturable plasmonic metasurfaces for laser mode locking

Light(Science & Applications) 2020年第1期9卷 1538-1546页

作者： jiyong wang Aurelien Coillet Olivier Demichel Zhiqiang wang Davi Rego Alexandre Bouhelier Philippe Grelu Benoit Cluzel Laboratoire Interdisciplinaire Carnot de Bourgogne Universite Bourgogne Franche-Comte9 avenue Alain Savary21078 DijonFrance Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province School of EngineeringWestlake University18 Shilongshan Road310024 HangzhouZhejiang ProvinceChina Institute of Advanced Technology Westlake Institute for Advanced Study18 Shilongshan Road310024 HangzhouZhejiang ProvinceChina Department of Electrotechnology Federal Institute of BahiaR.Emidio dos Santos40301015 SalvadorBrazil

Metamaterials are artificial materials made of subwavelength elementary cells that give rise to unexpected wave properties that do not exist ***,these properties are generally achieved due to 3D patterning,which is hardly feasible at short wavelengths in the visible and near-infrared regions targeted by most photonic *** overcome this limitation,metasurfaces,which are the 2D counterparts of metamaterials,have emerged as promising platforms that are compatible with planar nanotechnologies and thus mass production,which platforms the properties of a metamaterial into a 2D *** the linear regime,wavefront manipulation for lensing,holography,and polarization control has been achieved *** in metasurfaces operating in the nonlinear regime has also increased due to the ability of metasurfaces to efficiently convert incident light into harmonic frequencies with unusual polarization ***,to date,the nonlinear absorption of metasurfaces has been mostly ***,we demonstrate that plasmonic metasurfaces behave as saturable absorbers with modulation performances superior to the modulation performance of other 2D materials and exhibit unusual polarimetric nonlinear transfer *** quantify the link between saturable absorption,the plasmonic resonances of the unit cell and their distribution in a 2D metasurface,and finally provide a practical implementation by integrating the metasurfaces into a fiber laser cavity operating in pulsed regimes driven by the metasurface *** such,this work provides new perspectives on ultrathin nonlinear saturable absorbers for applications where tunable nonlinear transfer functions are needed,such as in ultrafast lasers or neuromorphic circuits.

关键词： properties absorber overcome

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Micro-scale opto-thermo-mechanical actuation in the dry adhesive regime

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Light(Science & Applications) 2021年第10期10卷 1905-1914页

作者： Weiwei Tang Wei Lyu Jinsheng Lu Fengjiang Liu jiyong wang Wei Yan Min Qiu Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province School of EngineeringWestlake University18 Shilongshan RoadHangzhou 310024 Zhejiang ProvinceChina Institute of Advanced Technology Westlake Institute for Advanced Study18 Shilongshan RoadHangzhou 310024 Zhejiang ProvinceChina State Key Laboratory of Modern Optical Instrumentation College of Optical Science and EngineeringZhejiang UniversityHangzhou 310027China

Realizing optical manipulation of microscopic objects is crucial in the research fields of life science,condensed matter physics,and physical *** non-liquid environments,this task is commonly regarded as difficult due to strong adhesive surface force(~µN)attached to solid interfaces that makes tiny optical driven force(~pN)***,by recognizing the microscopic interaction mechanism between friction force—the parallel component of surface force on a contact surface—and thermoelastic waves induced by pulsed optical absorption,we establish a general principle enabling the actuation of micro-objects on dry frictional surfaces based on the opto-thermo-mechanical ***,we predict that nanosecond pulsed optical absorption with mW-scale peak power is sufficient to tameµN-scale friction ***,we demonstrate the two-dimensional spiral motion of gold plates on micro-fibers driven by nanosecond laser pulses,and reveal the rules of motion *** results pave the way for the future development of micro-scale actuators in non-liquid environments.

关键词： friction regime absorption

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Plasmonic metafibers electro-optic modulators

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Light(Science & Applications) 2023年第9期12卷 1893-1901页

作者： Lei Zhang Xinyu Sun Hongyan Yu Niping Deng Feng Qiu jiyong wang Min Qiu College of Information Science and Electronic Engineering Zhejiang UniversityHangzhou 310027China Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province School of EngineeringWestlake University18 Shilongshan RoadHangzhou 310024 ZhejiangChina Institute of Advanced Technology Westlake Institute for Advanced Study18 Shilongshan RoadHangzhou 310024 ZhejiangChina College of Optical Science and Engineering Zhejiang UniversityHangzhou 310027China Hangzhou Institute for Advanced Study University of Chinese Academy of SciencesHangzhou 310024China Ministry of Education Engineering Research Center of Smart Microsensors and Microsystems School of Electronics and InformationHangzhou Dianzi UniversityHangzhou 310018China

Digitalizing optical signals through electric driving signals,electro-optic modulators(EOMs)are one of the cardinal elements in modern optical *** of current EOM devices are targeting on-chip integrations,which routinely suffer from high coupling losses,complex optical alignments and single-band *** this study,we for the first time integrate a lumped EOM device on the endfaces of a single-mode optical fiber jumper for fast amplitude *** from ultrathin and high quality-factor plasmonic metasurfaces,nanofabrication-friendly and highly efficient EO polymers and coupling-free connections with fiber networks,our EOM is demonstrated to allow dual-band operations(telecom O band and S band)and high-speed modulations(~1 GHz at a bias voltage of±9 V).This work offers an avenue to‘plug-and-play’implementations of EO devices and ultracompact“all-in-fibers”optical systems for communications,imaging,sensing and many others.

关键词： fiber fibers operations

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Cadmium-containing Wastewater Induced by SRB:Effect of Multiple Ions and Mineralization Process

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Journal of Wuhan University of Technology(Materials Science) 2021年第6期36卷 927-933页

作者： wang jiyong ZHOU Jie HE Wei HUANG Pinyuan College of Chemistry Chemical Engineering and Life ScienceWuhan University of TechnologyWuhan 430070China

The effects of various general and heavy metal ions in acidic cadmium-containing wastewater on SBR desulfurization and cadmium removal under different concentrations were ***_(4)^(2-) and S^(2-) inhibited SRB mineralization,and Mg^(2+),Ca^(2+),Fe^(2+),and Fe^(3+) promoted SRB mineralization at low concentration(Hg^(2+)>Cu^(2+)>Ni^(2+)>Zn^(2+)>Pb^(2+)>Mn^(2+)>Cr^(3+).Furthermore,the inverted microscopy and scanning electron microscopy(SEM)were used to observe the sediment crystallization process from macroscopic and microscopic viewpoints in the optimized ion *** experimental results show that under the mineralization of SRB,cadmium sediment crystallization is mainly divided into the rapid growth of bacteria,crystal nucleus production,block formation,and crystallization *** the same time,X-ray diffraction(XRD)and energy-dispersive spectra(EDS)have also confirmed the sediment and crystallization.

关键词： SRB mineralization process cadmium multiple ions

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Nonlinear plasmonics:second-harmonic generation and multiphoton photoluminescence

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PhotoniX 2023年第1期4卷 114-143页

作者： jiyong wang Lei Zhang Min Qiu Ministry of Education Engineering Research Center of Smart Microsensors and Microsystems School of Electronics and InformationHangzhou Dianzi UniversityHangzhou 310018China Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province School of EngineeringWestlake University18 Shilongshan RoadHangzhou 310024Zhejiang ProvinceChina Institute of Advanced Technology Westlake Institute for Advanced Study18 Shilongshan RoadHangzhou 310024Zhejiang ProvinceChina

The study on the nonlinear optical responses arising from plasmonic nanoantennas,known as nonlinear plasmonics,has been massively investigated in recent *** the most basic nonlinear optical responses,second-harmonic generation(SHG)and multiphoton photoluminescence(MPL),two-photon photoluminescence in particular,has aroused extensive interests,due to their distinct properties of being ultrasensitive to the spatial symmetry and ultrafast response time of hot *** this review,we give insights into fundamental roles dominating the radiations of such nonlinear optical processes and their recent research *** from other reviews on nonlinear plasmonics,which mainly focused on parametric processes,this review pays equal attentions to the incoherent process of *** in-depth description on the excitation and emission processes of MPL in accordance with recent studies is fully *** using the high‘symmetry rule’of SHG and ultrafast response time of MPL,advanced applications in surface enhanced spectroscopy,ultra-sensitive photodetector,biosensor and ultrafast laser pulses are highlighted in the end.

关键词： harmonic nonlinear symmetry

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Comparative Genome Analysis of Scutellaria baicalensis and Scutellaria barbata Reveals the Evolution of Active Flavonoid Biosynthesis

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Genomics, Proteomics & Bioinformatics 2020年第3期18卷 230-240页

作者： Zhichao Xu Ranran Gao Xiangdong Pu Rong Xu jiyong wang Sihao Zheng Yan Zeng Jun Chen Chunnian He Jingyuan Song Key Lab of Chinese Medicine Resources Conservation State Administration of Traditional Chinese Medicine of ChinaInstitute of Medicinal Plant DevelopmentChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100193China Engineering Research Center of Chinese Medicine Resource Ministry of EducationBeijing 100193China China National Traditional Chinese Medicine Co. LtdBeijing 102600China

Scutellaria baicalensis(***)and Scutellaria barbata(***)are common medicinal plants of the Lamiaceae *** produce specific flavonoid compounds,including baicalein,scutellarein,norwogonin,and wogonin,as well as their glycosides,which exhibit antioxidant and antitumor ***,we report chromosome-level genome assemblies of *** and *** with quantitative chromosomal variation(2 n=18 and 2 n=26,respectively).The divergence of *** and *** occurred far earlier than previously reported,and a whole-genome duplication(WGD)event was *** insertion of long terminal repeat elements after speciation might be responsible for the observed chromosomal expansion and *** genome analysis of the congeneric species revealed the species-specific evolution of chrysin and apigenin biosynthetic genes,such as the ***-specific tandem duplication of genes encoding phenylalanine ammonia lyase and chalcone synthase,and the ***-specific duplication of genes encoding 4-Co A *** addition,the paralogous duplication,colinearity,and expression diversity of CYP82 D subfamily members revealed the functional divergence of genes encoding flavone hydroxylase between *** and *** these Scutellaria genomes reveals the common and species-specific evolution of flavone biosynthetic ***,these findings would facilitate the development of molecular breeding and studies of biosynthesis and regulation of bioactive compounds.

关键词： Scutellaria Whole-genome duplication Flavonoid biosynthesis Tandem duplication Species-specific evolution

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基于风电机组健康状态的风电场功率分配研究

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电力系统保护与控制 2020年第20期48卷 106-113页

作者：刘军汪继勇西安理工大学自动化与信息工程学院陕西西安710048

评价风电机组健康状态,合理分配风电场中风电机组的功率,对降低风电场的运维成本有着重要意义。首先,利用风电机组监控与数据采集(supervisory control and data acquisition,SCADA)系统中的风电机组历史运行数据,训练基于长短期记忆(lo... 详细信息

评价风电机组健康状态,合理分配风电场中风电机组的功率,对降低风电场的运维成本有着重要意义。首先,利用风电机组监控与数据采集(supervisory control and data acquisition,SCADA)系统中的风电机组历史运行数据,训练基于长短期记忆(long short-term memory,LSTM)网络的风电机组输出功率预测模型。然后,根据预测功率和风电机组实测输出功率的偏差幅值将风电机组的健康状态分为良好、一般、较差等三个类别。最后,综合考虑风电场中每台机组的健康状态、最大发电能力和电网调度部门对风电场下达的发电指令,建立目标函数和约束条件,采用遗传算法进行求解,得到分配给每台机组的功率。仿真结果表明,所提出的方法不仅能够根据风电机组的健康状态合理分配机组功率,而且能够满足调度中心下达的风电场总的发电功率。

关键词：风电机组风电场状态评估功率分配 LSTM网络

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分权下的多规合一——深圳新区发展历程与规划思考

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城市发展研究 2013年第1期20卷 23-29+48页

作者：王吉勇深圳市城市规划设计研究院有限公司

以分权化为切入点,聚焦于从分权到新区成立、发展的逻辑演变,思考城市规划如何在这一过程中发挥作用以及未来的路径选择。首先对分权下的深圳新区发展历程及阶段特征进行分析,对其中的分权化、新区发展及城市规划之间的相互关系进行思考... 详细信息

以分权化为切入点,聚焦于从分权到新区成立、发展的逻辑演变,思考城市规划如何在这一过程中发挥作用以及未来的路径选择。首先对分权下的深圳新区发展历程及阶段特征进行分析,对其中的分权化、新区发展及城市规划之间的相互关系进行思考,提出城市规划的战略性引导和综合性实施两种作用方式。在此基础上,认为新型功能区的出现将是深圳城市治理和空间优化的主要空间平台,并为"多规合一"编制实践提供了很好的实施平台,而基于"多规合一"的综合发展规划将成为引导新型功能区发展的主要路径。最后,从组织机制、规划编制、规划实施三个方面对新区综合发展规划提出了具体建议。

关键词：分权化多规合一新型功能区综合发展规划深圳

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染整设备的发展趋势及国产染整设备的差距

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纺织导报 2005年第9期 83-86页

作者：王济永中国纺织工程学会染整专业委员会

染整设备正向着节能、降耗、优质、高效的方向发展。机械系统模块化、控制系统计算机化、售后服务遥控化已成为当今染整设备发展的主流。文章在分析染整设备发展趋势的同时,指出了国产染整设备的差距及改进的措施。

关键词：染整机械高效节能模块化智能化可靠性国内外比较

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盾构隧道下穿高速铁路运营线路路基段的施工技术

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城市轨道交通研究 2015年第7期18卷 105-108页

作者：王吉永江苏盛华工程监理咨询有限公司徐州高级工程师221006

结合苏州广济路地下空间人防配套设施工程(火车站站至三医院站区间隧道)成功穿越运营中沪宁城际高速铁路和京沪普速铁路工程实例,从组织机构保障、施工方案编审、地基加固、沉降控制标准确定、土仓压力控制等15个方面,论述了盾构穿越高... 详细信息

结合苏州广济路地下空间人防配套设施工程(火车站站至三医院站区间隧道)成功穿越运营中沪宁城际高速铁路和京沪普速铁路工程实例,从组织机构保障、施工方案编审、地基加固、沉降控制标准确定、土仓压力控制等15个方面,论述了盾构穿越高速铁路施工过程中的关键控制点,总结得出盾构隧道下穿运营中高速铁路技术的几个重要结论,包括对高速铁路的保护措施、沉降控制标准的确定、盾构土仓压力的控制、同步注浆及二次注浆等。

关键词：地铁盾构隧道既有高速铁路穿越

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