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High-performance polarization management devices based on thin-film lithium niobate

Light(Science & Applications) 2022年第5期11卷 868-876页

作者： Zhongjin Lin Yanmei Lin Hao Li Mengyue Xu mingbo he Wei Ke heyun Tan Ya Han Zhaohui Li Dawei Wang X.Steve Yao Songnian Fu Siyuan Yu Xinlun Cai State Key Laboratory of Optoelectronic Materials and Technologies School of Electronics and Information TechnologySun Yat-sen University510275 GuangzhouChina Department of Electrical and Computer Engineering The University of British ColumbiaVancouverBC V6T 1Z4Canada Photonics Information Innovation Center and hebei Provincial Center for Optical Sensing Innovations College of Physics Science and TechnologyHebei University071002 BaodingChina Institute of Advanced Photonics Technology School of Information EngineeringGuangdong University of Technology510006 GuangzhouChina

High-speed polarization management is highly desirable for many applications,such as remote sensing,telecommunication,and medical ***,most of the approaches for polarization management rely on bulky optical components that are slow to respond,cumbersome to use,and sometimes with high drive ***,we overcome these limitations by harnessing photonic integrated circuits based on thin-film lithium niobate *** successfully realize a portfolio of thin-film lithium niobate devices for essential polarization management functionalities,including arbitrary polarization generation,fast polarization measurement,polarization scrambling,and automatic polarization *** present devices feature ultra-fast control speeds,low drive voltages,low optical losses and compact *** these devices,we achieve high fidelity polarization generation with a polarization extinction ratio up to 41.9 dB and fast polarization scrambling with a scrambling rate up to 65 Mrad s−1,both of which are best results in integrated *** also demonstrate the endless polarization state tracking operation in our *** demonstrated devices unlock a drastically new level of performance and scales in polarization management devices,leading to a paradigm shift in polarization management.

关键词： polarization lithium film

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Digitally tunable optical delay line based on thinfilm lithium niobate featuring high switching speed and low optical loss

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Photonics Research 2022年第11期10卷 2575-2583页

作者： WEI KE YANMEI LIN mingbo he MENGYUE XU JIAXIANG ZHANG ZHONGJIN LIN SIYUAN YU XINLUN CAI State Key Laboratory of Optoelectronic Materials and Technologies School of Electronics and Information TechnologySun Yat-sen UniversityGuangzhou 510275China State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200092China Department of Electrical and Computer Engineering The University of British ColumbiaVancouverBritish Columbia V6T 1Z4Canada

A tunable optical delay line(ODL) featuring high switching speed and low optical loss is highly desirable in many fields. here, based on the thin-film lithium niobate platform, we demonstrate a digitally tunable on-chip ODL that includes five Mach–Zehnder interferometer optical switches, four flip-chip photodetectors, and four delayline waveguides. The proposed optical switches can achieve a switching speed of 13 ns and an extinction ratio of34.9 dB. Using a modified Euler-bend-based spiral structure, the proposed delay-line waveguide can simultaneously achieve a small footprint and low optical propagation loss. The proposed ODL can provide a maximum delay time of 150 ps with a resolution of 10 ps and feature a maximum insertion loss of 3.4 dB.

关键词： tunable optical interferometer

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Integrated thin film lithium niobate Fabry–Perot modulator[Invited]

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Chinese Optics Letters 2021年第6期19卷 8-12页

作者： Mengyue Xu mingbo he Yuntao Zhu Lin Liu Lifeng Chen Siyuan Yu Xinlun Cai State Key Laboratory of Optoelectronic Materials and Technologies and School of Electronics and Information Technology Sun Yat-sen UniversityGuangzhou 510000China

Integrated traveling-wave lithium niobate modulators need relatively large device lengths to achieve low drive voltage. To increase modulation efficiency within a compact footprint, we report an integrated Fabry–Perot-type electro-optic thin film lithium niobate on insulator modulator comprising a phase modulation region sandwiched between two distributed Bragg reflectors. The device exhibits low optical loss and a high tuning efficiency of 15.7 pm/V. We also confirm the modulator's high-speed modulation performance by non-return-to-zero modulation with a data rate up to 56 Gbit/s.

关键词： integrated optic devices lithium niobate optical modulators microstructure fabrication

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Advances in therapies using mesenchymal stem cells and their exosomes for treatment of peripheral nerve injury:state of the art and future perspectives

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Neural Regeneration Research 2025年第11期20卷 3151-3171页

作者： Fatima Aldali Chunchu Deng mingbo Nie Hong Chen Department of Rehabilitation Medicine Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei ProvinceChina Department of Orthopedics Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei ProvinceChina

“Peripheral nerve injury”refers to damage or trauma affecting nerves outside the brain and spinal *** nerve injury results in movements or sensation impairments,and represents a serious public health *** severed peripheral nerves have been effectively joined and various therapies have been offered,recovery of sensory or motor functions remains limited,and efficacious therapies for complete repair of a nerve injury remain *** emerging field of mesenchymal stem cells and their exosome-based therapies hold promise for enhancing nerve regeneration and *** stem cells,as large living cells responsive to the environment,secrete various factors and *** latter are nano-sized extracellular vesicles containing bioactive molecules such as proteins,microRNA,and messenger RNA derived from parent mesenchymal stem *** have pivotal roles in cell-to-cell communication and nervous tissue function,offering solutions to changes associated with cell-based *** ongoing investigations,mesenchymal stem cells and mesenchymal stem cell-derived exosome-based therapies are in the exploratory stage.A comprehensive review of the latest preclinical experiments and clinical trials is essential for deep understanding of therapeutic strategies and for facilitating clinical *** review initially explores current investigations of mesenchymal stem cells and mesenchymal stem cell-derived exosomes in peripheral nerve injury,exploring the underlying ***,it provides an overview of the current status of mesenchymal stem cell and exosomebased therapies in clinical trials,followed by a comparative analysis of therapies utilizing mesenchymal stem cells and ***,the review addresses the limitations and challenges associated with use of mesenchymal stem cell-derived exosomes,offering potential solutions and guiding future directions.

关键词： clinical trials exosome extracellular vesicles mesenchymal stem cells nerve regeneration peripheral nerve injury pre-clinical experiments

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Bias-drift-free Mach–Zehnder modulators based on a heterogeneous silicon and lithium niobate platform

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Photonics Research 2020年第12期8卷 1958-1963页

作者： SHIHAO SUN mingbo he MENGYUE XU SheNGQIAN GAO ZIYAN CheN XIAN ZHANG ZILIANG RUAN XIONG WU LIDAN ZHOU LIN LIU CHAO LU CHANGJIAN GUO LIU LIU SIYUAN YU XINLUN CAI State Key Laboratory of Optoelectronic Materials and Technologies and School of Electronics and Information Technology Sun Yat-sen UniversityGuangzhou 510000China Centre for Optical and Electromagnetic Research Guangdong Provincial Key Laboratory of Optical Information Materials and TechnologySouth China Academy of Advanced OptoelectronicsSouth China Normal UniversityHigher-Education Mega-CenterGuangzhouChina Department of Electronic and Information Engineering Photonics Research CentreThe Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina State Key Laboratory for Modern Optical Instrumentation Centre for Optical and Electromagnetic ResearchZhejiang Provincial Key Laboratory for Sensing TechnologiesZijingang CampusZhejiang UniversityHangzhou 310058China

Optical modulators have been and will continue to be essential devices for energy-and cost-efficient optical communication *** silicon and lithium niobate modulators have demonstrated promising performances of low optical loss,low drive voltage,and large modulation ***,DC bias drift is a major drawback of optical modulators using lithium niobate as the active electro-optic ***,we demonstrate high-speed and bias-drift-free Mach–Zehnder modulators based on the heterogeneous silicon and lithium niobate *** devices combine stable thermo-optic DC biases in silicon and ultra-fast electro-optic modulation in lithium niobate,and exhibit a low insertion loss of 1.8 d B,a low half-wave voltage of 3 V,an electro-optic modulation bandwidth of at least 70 GHz,and modulation data rates up to 128 Gb/s.

关键词： modulators lithium niobate

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Recent progress in constructing fluorinated solid-electrolyte interphases for stable lithium metal anodes

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 270-291页

作者： Di Zhang Pengfei Lv Wei Qin Xin he Yuanhua he Civil Aircraft Fire Science and Safety Engineering Key Laboratory of Sichuan Province College of Civil Aviation Safety EngineeringCivil Aviation Flight University of ChinaGuanghan 618307China School of Chemical Engineering Sichuan UniversityChengdu 610065China

Lithium metal batteries(LMBs)are emerging as a promising energy storage solution owing to their high energy density and specific ***,the non-uniform plating of lithium and the potential rupture of the solid-electrolyte interphase(SEI)during extended cycling use may result in dendrite growth,which can penetrate the separator and pose significant short-circuit *** a stable SEI is essential for the long-term operation of the ***-rich SEI has garnered significant attention for its ability to effectively passivate electrodes,regulate lithium deposition,and inhibit electrolyte *** the structural components and preparation methods of existing fluorinated SEI is crucial for optimizing lithium metal anode *** paper reviews the research on optimizing LiF passivation interfaces to protect lithium metal *** focuses on four types of compositions in fluorinated SEI that work synergistically to enhance SEI *** instance,combining compounds with LiF can further enhance the mechanical strength and ionic conductivity of the *** metals with LiF significantly improves electrochemical performance at the SEI/anode interface,with a necessary focus on reducing electron tunneling ***,incorporating polymers with LiF offers balanced improvements in interfacial toughness and ionic conductivity,though maintaining structural stability over long cycles remains a critical area for future *** alloys combined with LiF increase surface energy and lithium affinity,challenges such as dendrite growth and volume expansion *** summary,this paper emphasizes the crucial role of interfacial structures in LMBs and offers comprehensive guidance for future design and development efforts in battery technology.

关键词： LiF lithium metal anodes solid-electrolyte interphase interface cycling stability

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智能头盔电磁兼容性解决方案研究

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新技术新工艺 2015年第10期 87-89页

作者：何铭波陈锦彪广东电网有限责任公司佛山供电局广东佛山528000

随着电力工业和信息技术的发展,电磁兼容问题日益受到重视。智能头盔作为一种新型电子产品,在给外界带来电磁干扰的同时,也不可避免地受到外界的电磁环境影响研究了智能头盔的电磁兼容性能,并从加屏蔽罩、滤波、优化电路布局布线、使用... 详细信息

随着电力工业和信息技术的发展,电磁兼容问题日益受到重视。智能头盔作为一种新型电子产品,在给外界带来电磁干扰的同时,也不可避免地受到外界的电磁环境影响研究了智能头盔的电磁兼容性能,并从加屏蔽罩、滤波、优化电路布局布线、使用TVS管等方面,对智能头盔存在的辐射骚扰、传导骚扰、静电放电、电磁干扰、快瞬、浪涌、电压骤降和短时中断等现象,给出了对应的解决方案。

关键词：智能头盔电磁兼容电磁骚扰

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广元市油橄榄产业发展与思考

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湖北林业科技 2018年第4期47卷 48-50,62页

作者：何明波杨明府孟瑜广元市林业园林科学研究院广元628000 广元市林木种苗站广元628000

广元市是四川引种油橄榄且成功结实的区域之一,借助国家退耕还林工程建设,形成特色产业发展基础。本文概述了广元油橄榄产业发展历程,并从技术角度分析了产业发展停滞的原因,提出需坚持适地适品种原则,进行区域品种优化配置,创新培育经... 详细信息

广元市是四川引种油橄榄且成功结实的区域之一,借助国家退耕还林工程建设,形成特色产业发展基础。本文概述了广元油橄榄产业发展历程,并从技术角度分析了产业发展停滞的原因,提出需坚持适地适品种原则,进行区域品种优化配置,创新培育经营主体,实施一三产业融合的特色乡村建设,培养驻村林技员,维护和树立区域品牌,促进产业健康发展。

关键词：油橄榄产业发展广元市

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新型PS-聚合物螯合剂的合成与性能的研究

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河南科学 2008年第8期26卷 918-919页

作者：贺明波张宏盛焦学瞬郑州迅达特种材料厂郑州450003 开封教育学院河南开封475004 郑州轻工业学院郑州450002

用乳液聚合法合成了一种新型聚合物螯合剂,并对其螯合性能进行了测定,实验结果表明,投料比为1.3∶1∶2时,反应2 h,其合成螯合剂产品转化率达90%以上.

关键词：螯合剂合成性能树脂

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Constraints on holographic QCD phase transitions from PTA observations

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 71-78页

作者： Song he Li Li Sai Wang Shao-Jiang Wang Center for Theoretical Physics and College of Physics Jilin University School of Physical Science and Technology Ningbo University Max Planck Institute for Gravitational Physics (Albert Einstein Institute) CAS Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences School of Fundamental Physics and Mathematical Sciences Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of Sciences (UCAS) School of Physical Sciences University of Chinese Academy of Sciences (UCAS) Theoretical Physics Division Institute of High Energy Physics Chinese Academy of Sciences

The underlying physics of QCD phase transition in the early Universe remains largely unknown due to its strong-coupling nature during the quark-gluon plasma/hadron gas transition, yet a holographic model has been proposed to quantitatively fit the lattice QCD data while with its duration of the first-order phase transition(FoPT) left undetermined. At specific baryon chemical potential, the first-order QCD phase transition agrees with the observational constraint of baryon asymmetry. It, therefore, provides a scenario for phase transition gravitational waves(GWs) within the standard model of particle physics. If these background GWs could contribute dominantly to the recently claimed common-spectrum red noise from pulsar timing array(PTA) observations, the duration of this FoPT can be well constrained, and the associated primordial black holes are still allowed by current observations.

关键词： pulsar timing array QCD phase transition gravitational waves primordial black holes

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