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Enhancing plasmonic trapping with a perfect radially polarized beam

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Photonics Research 2018年第9期6卷 847-857页

作者： xianyou wang yuquan zhang yanmeng dai changjun min xiaocong yuan Nanophotonics Research Center Shenzhen Key Laboratory of Micro-Scale Optical Information TechnologyShenzhen UniversityShenzhen 518060China

Strong plasmonic focal spots, excited by radially polarized light on a smooth thin metallic film, have been widely applied to trap various micro-and nano-sized objects. However, the direct transmission part of the incident light leads to the scattering force exerted on trapped particles, which seriously affects the stability of the plasmonic *** we employ a novel perfect radially polarized beam to solve this problem. Both theoretical and experimental results verify that such a beam could strongly suppress the directly transmitted light to reduce the piconewton scattering force, and an enhanced plasmonic trapping stiffness that is 2.6 times higher is achieved in *** present work opens up new opportunities for a variety of research requiring the stable manipulations of particles.

关键词：金属薄膜偏振光等离子体通讯技术

All-optical manipulation of micrometer-sized metallic particles

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Photonics Research 2018年第2期6卷 66-71页

作者： YUQUAN ZHANG XIUJIE Dou yanmeng dai XIANYOU WANG CHANGJUN MIN AND XIAOCONG YUAN Nanophotonics Research Center Shenzhen University Shenzhen 518060 China

Optical traps use focused laser beams to generate forces on targeted objects ranging in size from nanometers to micrometers. However, for their high coefficients of scattering and absorption, micrometer-sized metallic particles were deemed non-trappable in three dimensions using a single beam. This barrier is now removed. We demonstrate, both in theory and experiment, three-dimensional(3D) dynamic all-optical manipulations of micrometersized gold particles under high focusing conditions. The force of gravity is found to balance the positive axial optical force exerted on particles in an inverted optical tweezers system to form two trapping positions along the vertical direction. Both theoretical and experimental results confirm that stable 3D manipulations are achievable for these particles regardless of beam polarization and wavelength. The present work opens up new opportunities for a variety of in-depth research requiring metallic particles.

关键词：激光束通讯技术技术创新纳米

Multifunctional geometric phase optical element for high-efficiency full Stokes imaging polarimetry

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Photonics Research 2019年第9期7卷 1066-1074页

作者： yanmeng dai YUQUAN ZHANG YOUPENG XIE DAPENG WANG XIANYOU WANG ITING LEI CHANGJUN MIN XIAOCONG YUAN Nanophotonics Research Center Shenzhen Key Laboratory of Micro-Scale Optical Information Technology Shenzhen University

Polarization imaging finds applications in many areas, such as photoelasticity, ellipsometry, and biomedical imaging. A compact, snapshot, and high-efficiency imaging polarimeter is highly desirable for many ***, based on a single multifunctional geometric phase optical element(GPOE), a new method is proposed for high-efficiency snapshot imaging polarimetry. With tailored spatially varying orientation of each anisotropic unit cell, the GPOE works highly efficiently as both a spin sorter and a half-wave plate, enabling snapshot retrieving of a full Stokes vector of incident light. The designed GPOE is implemented in the form of liquid crystal fabricated with a photo-alignment technology, and its application in imaging polarimetry is experimentally demonstrated by retrieving full Stokes parameters of a cylinder vector beam. This method can also work in the form of plasmonic or dielectric metasurfaces, enabling ultra-compact polarization detection systems by monolithic integration with other devices such as metalenses.

关键词： red Stokes Multifunctional geometric phase optical element for high-efficiency full Stokes imaging polarimetry

High-speed Stokes vector receiver enabled by a spin-dependent optical grating

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Photonics Research 2021年第8期9卷 1470-1476页

作者： YOUPENG XIE TING LEI DAWEI WANG JIANXIN REN yanmeng dai YANJUN CHEN LUPING DU BO LIU ZHAOHUI LI XIAOCONG YUAN Nanophotonics Research Centre Shenzhen UniversityShenzhen 518060China State Key Laboratory of Optoelectronic Material and Technologies and School of Electronics and Information Technology Sun Yat-sen UniversityGuangzhou 510006China lnstitute of Optics and Electronics Nanjing University of Information Science and TechnologyNanjing 210044China

Stokes vector direct detection is a promising,cost-effective technology for short-distance communication ***,we design and fabricate a spin-dependent liquid crystal grating to detect light polarization *** separating the circular and linear components of incident light,the polarization states can be resolved with accuracy of up to 0.25°.We achieved Stokes vector direct detection of quadrature phase-shift keying(QPSK),8 PSK,and16-ary quadrature amplitude modulation signals with 32,16,and 16 GBd rates,*** integrated the system,including the grating,photodetectors,and optical elements,on a miniaturized printed circuit board and demonstrated high-speed optical communications with 16 GBd rate QPSK signals.

关键词： polarization optical QPSK

AKT2^(S128)/CCTα^(S315/319/323)-positive cancer-associated fibroblasts (CAFs) mediate focal adhesion kinase (FAK) inhibitors resistance via secreting phosphatidylcholines (PCs)

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Signal Transduction and Targeted Therapy 2024年第2期9卷 782-796页

作者： Jie Chen Lingyuan Zhang Yuheng Zhu Di Zhao Jing Zhang yanmeng Zhu Jingyuan Pang Yuanfan Xiao Qingnan Wu Yan Wang Qimin Zhan Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education/Beijing) Laboratory of Molecular OncologyPeking University Cancer Hospital&Institute100142 BeijingChina Peking University International Cancer Institute Peking University100191 BeijingChina Research Unit of Molecular Cancer Research Chinese Academy of Medical SciencesBeijingChina Soochow University Cancer Institute Suzhou 215000China Institute of Cancer Research Shenzhen Bay LaboratoryShenzhen 518107China

Abnormal metabolism is regarded as an oncogenic hallmark related to tumor progression and therapeutic *** study employed multi-omics,including phosphoproteomics,untargeted metabolomics and lipidomics,to demonstrate that the pAKT2 Ser128 and pCCTαSer315/319/323-positive cancer-associated fibroblasts(CAFs)substantially release phosphatidylcholines(PCs),contributing to the resistance of focal adhesion kinase(FAK)inhibitors in esophageal squamous cell carcinoma(ESCC)***,we observed extremely low levels of FAK Tyr397 expression in CAFs,potentially offering no available target for FAK inhibitors playing their anti-growth role in ***,FAK inhibitor increased the intracellular concentration of Ca2+in CAFs,promoting the formation of AKT2/CCTαcomplex,leading to phosphorylation of CCTαSer315/319/323 sites and eventually enhancing stromal PC *** activation could stimulate the intratumoral Janus kinase 2(JAK2)/Signal transducer and activator of transcription 3(STAT3)pathway,triggering resistance to FAK *** of clinical samples demonstrated that stromal pAKT2 Ser128 and pCCTαSer315/319/323 are related to the tumor malignancy and reduced patient ***-targeted lipidomics and further validation cohort quantitatively showed that plasma PCs enable to distinguish the malignant extent of ESCC *** conclusion,inhibition of stroma-derived PCs and related pathway could be possible therapeutic strategies for tumor therapy.

关键词： CAFs metabolism resistance

Thailand and China Cooperate to Improve the Stability of Regional Supply Chain

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China's Foreign Trade 2024年第2期 38-40页

作者： Guo Yan Sui yanmeng 不详

"Trade and investment cooperation has always been one of the cornerstones of the bilateral relations between Thailand and *** the past two years,China has become Thailand's largest source of foreign investment,and next year will witness the 50th anniversary of the establishment of diplomatic relations between the two *** sides will also strive to build a more stable.

关键词： investment Supply corners

毕尔《宋云惠生行纪》英译重译与中国形象的表意实践

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国际汉学 2024年第4期 30-35,60,155页

作者：王烟朦华中科技大学外国语学院

北魏宋云的西域求法行纪汇集在《洛阳伽蓝记》中的《宋云惠生行纪》篇,并由英国海军牧师毕尔分别于1869年和1884年两度翻译成英文。本文从重译视角比较毕尔前后两次的英译文所构建的中国形象,发现文化“他者”在19世纪欧洲构筑起的东方... 详细信息

北魏宋云的西域求法行纪汇集在《洛阳伽蓝记》中的《宋云惠生行纪》篇,并由英国海军牧师毕尔分别于1869年和1884年两度翻译成英文。本文从重译视角比较毕尔前后两次的英译文所构建的中国形象,发现文化“他者”在19世纪欧洲构筑起的东方主义中,不断消解了中国乌托邦文明的图景。究其缘由,这与大英帝国在东方的殖民主义统治扩张和毕尔转向学术迂回传教的路线密不可分。

关键词：《宋云惠生行纪》毕尔中国形象东方主义

数字经济下董事网络嵌入对企业成长的影响研究

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管理学报 2024年第2期21卷 240-250页

作者：王彦萌许冠南陈庆江北京邮电大学经济管理学院北京市100876 山东财经大学工商管理学院

以2008~2020年中国A股上市公司为研究样本,探究董事网络嵌入对企业成长的影响,以及数字化转型进程在其中的调节机制。研究表明,董事网络关系嵌入和结构嵌入对企业成长均具有倒U形影响,而数字化转型进程使得前述倒U形曲线趋于平缓。进一... 详细信息

以2008~2020年中国A股上市公司为研究样本,探究董事网络嵌入对企业成长的影响,以及数字化转型进程在其中的调节机制。研究表明,董事网络关系嵌入和结构嵌入对企业成长均具有倒U形影响,而数字化转型进程使得前述倒U形曲线趋于平缓。进一步地,发现数字化“底层技术转型”使得结构嵌入与企业成长的关系曲线变缓,对关系嵌入与企业成长关系的调节效应不显著;数字化“技术实践应用”使得关系嵌入与企业成长的关系曲线变缓,对结构嵌入与企业成长关系的调节效应不明显。

关键词：关系嵌入结构嵌入企业成长数字化转型进程董事网络

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满约束轴向拼接张拉整体结构的自稳定性分析

哈尔滨工程大学学报 2024年第3期45卷 552-560页

作者：刘贺平王艳蒙曹紫莺罗阿妮王焰新哈尔滨工程大学机电工程学院黑龙江哈尔滨150001 上汽通用汽车汽车有限公司武汉分公司湖北武汉430208

为获得更多张拉整体构型和拓扑结构,本文基于平衡方程,研究张拉整体拼接结构自稳定条件下的结构参数关系的求取方法。基于三杆张拉整体单元轴向拼接形成的臂状张拉整体结构,以减少结构节点约束数为目的去除索构件,获得一种新型满约束轴... 详细信息

为获得更多张拉整体构型和拓扑结构,本文基于平衡方程,研究张拉整体拼接结构自稳定条件下的结构参数关系的求取方法。基于三杆张拉整体单元轴向拼接形成的臂状张拉整体结构,以减少结构节点约束数为目的去除索构件,获得一种新型满约束轴向拼接张拉整体结构;分析此结构的节点坐标、构件向量的求取方法,推导结构的平衡方程;依据节点和构件之间的连接关系,以获得方阵形式的平衡矩阵为目标,提出了平衡方程缩减原则;根据平衡方程有非零解,平衡矩阵行列式为零的原则,获得保证张拉整体结构自稳定的结构参数关系。通过具体实例分析,证明此方法正确,获得的结构参数关系能够保证确定的满约束轴向拼接张拉整体结构的自稳定性。

关键词：张拉整体基本单元找形稳定构型节点矩阵连接矩阵节点力平衡平衡方程