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Ultrafast laser state active controlling based on anisotropic quasi-1D material

Light(Science & Applications) 2024年第4期13卷 717-726页

作者： Zixin Yang Qiang Yu Jian Wu Haiqin Deng Yan Zhang Wenchao Wang Tianhao Xian Luyi Huang Junrong Zhang Shuai Yuan Jinyong Leng Li Zhan Zongfu Jiang Junyong Wang Kai Zhang Pu Zhou College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangsha 410073China. Nanhu Laser Laboratory National University of Defense TechnologyChangsha 410073China. i-Lab&Key Laboratory of nanodevices and Applications&Key Laboratory of nanophotonic Materials and Devices Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China. School of Applied and Engineering Physics Cornell UniversityIthacaNY 14853USA. State Key Laboratory of Advanced Optical Communication Systems and Networks School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China. Shanghai Key Lab of Modern Optical System University of Shanghai for Science and TechnologyShanghai 200093China

Laser state active controlling is challenging under the influence of inherent loss and other nonlinear effects in ultrafast *** an extension of degree of freedom in optical devices based on low-dimensional materials may be a way ***,the anisotropic quasi-one-dimensional layered material Ta2PdS6 was utilized as a saturable absorber to modulate the nonlinear parameters effectively in an ultrafast system by polarization-dependent *** polarization-sensitive nonlinear optical response facilitates the Ta2PdS6-based mode-lock laser to sustain two types of laser states,i.e.,conventional soliton and noise-like *** laser state was switchable in the single fiber laser with a mechanism revealed by numerical *** coding was further demonstrated in this platform by employing the laser as a codable light *** work proposed an approach for ultrafast laser state active controlling with low-dimensional material,which offers a new avenue for constructing tunable on-fiber devices.

关键词： polarization fiber controlling

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油墨粘度对卷对卷印刷有机光活性层的油墨转移速率和薄膜缺陷的影响机理

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Science China Materials 2024年第8期67卷 2600-2610页

作者：刘媛琪王振国潘雅琴刘天宇张亚宾张青莫黎昕骆群马昌期 Beijing Engineering Research Center of Printed Electronics Beijing Institute of Graphic CommunicationBeijing 102600China i-Lab&Printable Electronics Research Center Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of Sciences(CAS)Suzhou 215123China Vacuum Interconnected nanotech Workstation(nano-X) Suzhou Institute of Nano-Tech and Nano-Bionics of Chinese Academy of Sciences(CAS)Suzhou 215123China

卷对卷(R2R)凹版印刷具有高的边缘分辨率、可图案化、高加工速度等优势,是制备大面积柔性有机太阳能电池(FOSCs)的一种可行技术.有机光活性层的薄膜质量是决定有机太阳能电池器件性能的关键.对于凹版印刷过程而言,墨水的转移是影响印刷... 详细信息

卷对卷(R2R)凹版印刷具有高的边缘分辨率、可图案化、高加工速度等优势,是制备大面积柔性有机太阳能电池(FOSCs)的一种可行技术.有机光活性层的薄膜质量是决定有机太阳能电池器件性能的关键.对于凹版印刷过程而言,墨水的转移是影响印刷薄膜厚度和质量的关键.本文深入研究了有机光活性层的墨水粘度对墨水转移率和薄膜缺陷的影响.我们开发了紫外可见光谱法,量化凹版印刷过程中墨水的转移率.通过对墨水的流变行为分析、流体动力学模拟和实验验证,深入研究了油墨粘度与油墨转移率、膜厚和膜均匀性之间的关系.结果表明,油墨粘度约为25 m Pa·s是R2R凹版印刷有机光活性层薄膜的适合粘度.通过对油墨配方的优化,我们制备了全R2R印刷FOSCs,其中1 cm^(2);电池的效率超过12%.

关键词：凹版印刷油墨粘度油墨转移率有机太阳能电池油墨配方紫外可见光谱法流体动力学模拟活性层

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Gd_(3)Al_(3)Ga_(2)O_(12):Ce^(3+), Yb^(3+) fluorescent ceramic with highly increased trap density for optical information storage

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Chinese Optics Letters 2024年第7期22卷 59-65页

作者： Jiaocheng Yin Renjie Jiang Junwei Zhang Qiao Hu Miao Zhao Xiaoxia Wang Anlian Pan Hao Ruan College of Materials Science and Engineering Hunan UniversityChangsha 410082China Photonic Integrated Circuits Center Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China

Electron-trapping materials,due to their exceptional ability of energy storage and controllable photon release under external stimulation,have attracted considerable attention in the field of optical information storage(OIS).In this work,Gd_(3)Al_(3)Ga_(2)O_(12):Ce^(3+), Yb^(3+)fluorescent ceramics,were developed using air and vacuum sintering *** co-doping Ce^(3+)and Yb^(3+),the trap density was significantly increased by 7.5 times compared to samples containing only Ce^(3+).Vacuum annealing further enhanced trap density by 1.6 times compared to samples sintered solely in air,while generating deep traps(1.44 eV),making Gd_(3)Al_(3)Ga_(2)O_(12):Ce^(3+), Yb^(3+) an excellent OIS *** work is expected to facilitate the development of OIS materials.

关键词： electron-trapping materials optical information storage Gd_(3)Al_(3)Ga_(2)O_(12):Ce^(3+),Yb^(3+) two-step sintering method.

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Cost-effective fabrication of liquid metals via a laser induced graphene stamp for highly-stretchable integrated optoelectronics

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nano Research 2024年第8期17卷 7603-7613页

作者： Weiqi Sun Li Xiang Zebang Luo Hui Wang Dong Li Anlian Pan College of Materials Science and Engineering Hunan UniversityChangsha 410082China

Stretchable electronics have found widespread applications in various fields such as wearable electronics,soft robots,and *** an important promising alternative of traditional rigid conductors,liquid metals have demonstrated immense potential to provide high conductivity and stretchability for the stretchable electronic ***,limited by their fluidity and high surface tension,challenges remain in achieving liquid metal patterns with low-cost,high-precision,large-scale,and complex ***,a fabrication technique was proposed based on laser-induced graphene(LIG)stamps to enable liquid metal self-selectively adhere to *** metal patterns could thus be achieved in different designed geometries and could be transferred onto stretchable *** liquid metal patterns exhibit exceptional electrical conductivity(3.24×10^(6)S/m even under 1000%strain),high stretchability(1000%strain,maximum of 2500%),small resistance changes under significant deformations(with a quality factor of 62.5 under 1000%strain),and high resolution(down to 50μm).Utilizing the patterned liquid metals,a stretchable integrated multifunctional optoelectronic system was demonstrated,encompassing a stretchable display matrix,a pressure sensor array,a wireless powering coil,and cardiovascular sensors,which further highlight the remarkable application potential of liquid metals in optoelectronic user-interaction and advanced physiological monitoring.

关键词： liquid metal wettability selective adhesion transfer printing stretchable electronics

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Layer-by-layer epitaxy growth of thickness-controllable two-dimensional tungsten disulfide

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Science China(Information Sciences) 2024年第5期67卷 302-310页

作者： Jieyuan LIANG Zixing ZOU Junwu LIANG Di WANG Biao WANG Anshi CHU Jiali YI Cheng ZHANG Lizhen FANG Tian ZHANG Huawei LIU Xiaoli ZHU Dong LI Anlian PAN Key Laboratory for Micro-nano Physics and technology of Hunan Province State Key Laboratory of Chemo/Biosensing and Chemometrics Hunan Institute of Optoelectronic IntegrationCollege of Materials Science and Engineering School of Physics and ElectronicsHunan University School of Electronic Information and Electrical Engineering Changsha University School of Physics and Telecommunication Engineering Yulin Normal University Units Semiconductor technology Co. Ltd. School of Physics and Electronics Hunan Normal University

Bilayer transition metal dichalcogenides（TMDs） balance the high mobility of single layers with the high state density of multilayers and therefore have promising application prospects in high-performance electronics. However, the layer-controlled growth of 2D materials is still confronted with challenges such as poor repeatability between different labs and a limited understanding of the growth mechanism at the atomic scale. Herein, we report a new carbon-assisted chemical vapor deposition process that can realize the growth of WS2sheets with high yield, precise thickness controllability, and repeatability. We show that carbon can act as a reducing agent and catalyst that preferentially reacts with the WO3precursor to form intermediate WO3-xproducts with low-valence state W. The resulting oxycarbide gas has a low surface adsorption energy when deposited on the surface of as-grown WS2, which provides nucleation sites for the subsequent layer of WS2growth and leads to the vertical growth of WS2sheets. The growth mechanism is thoroughly investigated. Electrical transport measurements show that the produced bilayer WS2possesses a high carrier mobility(up to 58 cm2·V-1·s-1) and small subthreshold swing（estimated to be 148 mV/decade）,which are among the best reported results for TMDs produced using CVD.

关键词： WS$_2$ thickness-controlled growth chemical vapor deposition additive carbon

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一种实现单层MoS_(2)光致发光显著增强的有效缺陷工程策略

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Science China Materials 2024年第7期67卷 2232-2238页

作者：陈荧黄卓睿刘华伟喻国粮张金鼎徐哲元陈明星李东马超黄明朱小莉陈舒拉蒋英潘安练 Key Laboratory for Micro-nano Physics and technology of Hunan Province Hunan Institute of Optoelectronic IntegrationSchool of Physics and ElectronicsCollege of Materials Science and EngineeringHunan UniversityChangsha 410082China School of Physics and Electronics Hunan Normal UniversityChangsha 410081China State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China

二维过渡金属硫族化合物(TMDCs)材料被认为是拓展摩尔定律的极具前景的候选材料.然而,该材料的低光致发光效率严重限制了其实际应用,其本质源于材料制备中不可避免引入的缺陷.在本文中,我们报道了一种Sr掺杂单层MoS_(2)的有效缺陷工程策... 详细信息

二维过渡金属硫族化合物(TMDCs)材料被认为是拓展摩尔定律的极具前景的候选材料.然而,该材料的低光致发光效率严重限制了其实际应用,其本质源于材料制备中不可避免引入的缺陷.在本文中,我们报道了一种Sr掺杂单层MoS_(2)的有效缺陷工程策略,该策略在实验上通过简便的化学气相沉积(CVD)一步法成功实现.所制备的具有亚毫米(~324μm)级的大尺寸样品的光致发光可实现高达两个数量级的增强,并伴随着载流子寿命的显著增强.这一现象主要归因于Sr掺杂后MoS_(2)体系中其三激子向激子转换.与此同时,掺杂样品的辐射质量和稳定性也显著提升.第一性原理计算进一步阐明了其调控机制,即在MoS_(2)中引入适当互补缺陷能级与其自身的缺陷能级协同,从而可调节其载流子组分,以实现光致发光的显著增强.此外,我们的缺陷工程策略也适用于其他掺杂剂,如钙掺杂剂.我们的工作报告了一种可以显著提升单层MoS_(2)的荧光性能的有效缺陷工程策略,这为设计和调控二维TMDCs的光电特性提供一种极具前途的方法.

关键词： MoS_(2) substitutional doping photoluminescence in-tensity enhancement first-principles calculations

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二维铁电半导体层级处理模块设计及低功耗高性能人工视觉系统应用

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Science Bulletin 2024年第4期69卷 473-482页

作者：吴广成向立王文强姚程栋颜泽毅张成吴家鑫刘勇郑弼元刘华伟胡城伟孙兴霞朱晨光王一喆熊雄吴燕庆高亮李东潘安练李晟曼 Key Laboratory for Micro-nano Physics and technology of Hunan Province State Key Laboratory of Chemo/Biosensing and ChemometricsCollege of Materials Science and EngineeringHunan UniversityChangsha 410082China Hunan institute of Optoelectronic Integration Hunan UniversityChangsha 410082China Hunan institute of Advanced Sensing and Information technology Xiangtan UniversityXiangtan 411105China School of Integrated Circuits Peking UniversityBeijing 100871China Wuhan National Laboratory for Optoelectronics(WNLO) Huazhong University of Science and Technology(HUST)Wuhan 430074China

The growth of data and Internet of Things challenges traditional hardware,which encounters efficiency and power issues owing to separate functional units for sensors,memory,and *** this study,we designed an a-phase indium selenide(a-In_(2)Se_(3))transistor,which is a two-dimensional ferroelectric semiconductor as the channel material,to create artificial optic-neural and electro-neural synapses,enabling cutting-edge processing-in-sensor(PIS)and computing-in-memory(CIM)*** an optic-neural synapse for low-level sensory processing,the a-In_(2)Se_(3)transistor exhibits a high photoresponsivity(2855 A/W)and detectivity(2.91×10^(14)Jones),facilitating efficient feature *** high-level processing tasks as an electro-neural synapse,it offers a fast program/erase speed of 40 ns/50μs and ultralow energy consumption of 0.37 aJ/*** AI vision system using a-In_(2)Se_(3)transistors has been *** achieved an impressive recognition accuracy of 92.63%within 12 epochs owing to the synergistic combination of the PIS and CIM *** study demonstrates the potential of the a-In_(2)Se_(3)transistor in future vision hardware,enhancing processing,power efficiency,and AI applications.

关键词： Two-dimensional ferroelectric semiconductor Processing-in-sensor Computing-in-memory Synaptic device Artificial-intelligence vision system

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Quantum engineering of non-equilibrium efficient p-doping in ultra-wide band-gap nitrides

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Light(Science & Applications) 2021年第4期10卷 671-680页

作者： Ke Jiang Xiaojuan Sun Zhiming Shi Hang Zang Jianwei Ben Hui-Xiong Deng Dabing Li State Key Laboratory of Lum inescence and Applications Changchun Institute of OpticsRne Mechanics and PhysicsChinese Academy of SciencesDongnanhu Road No.3888Changchun 130033China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesYuquan Road No.19Beijing 100049China State Key Laboratory of Superlattices and M icrostruaures Institute of SemiconductorsChinese Academy of SciencesQinghuadong Road No.35Beijing 100083China

Ultra-wide band-gap nitrides have huge potential in micro-and optoelectronics due to their tunable wide band-gap,high breakdown field and energy density,excellent chemical and thermal ***,their application has been severely hindered by the low p-doping efficiency,which is ascribed to the ultrahigh acceptor activation energy originated from the low valance band ***,a valance band modulation mode is proposed and a quantum engineering doping method is conducted to achieve high-efficient p-type ultra-wide band-gap nitrides,in which GaN quantum-dots are buried in nitride matrix to produce a new band edge and thus to tune the dopant activation *** non-equilibrium doping techniques,quantum engineering doped AIGaN:Mg with Al content of 60%is successfully *** Mg activation energy has been reduced to about 21 meV,and the hole concentration reaches higher than 10^(18)cm^(-3)at room ***,similar activation energies are obtained in AIGaN with other Al contents such as 50%and 70%;indicating the universality of the quantum engineering doping ***,deep-ultraviolet light-emission diodes are fabricated and the improved performance further demonstrates the validity and merit of the *** the quantum material growth techniques developing,this method would be prevalently available and tremendously stimulate the promotion of ultra-wide band-gap semiconductor-based devices.

关键词： doping breakdown quantum

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High‑Temperature‑Tolerant Artificial Muscles Using Poly(p‑phenylene benzobisoxazole)Composite Yarns

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Advanced Fiber Materials 2022年第5期4卷 1256-1266页

作者： Jianfeng He Ming Ren Lizhong Dong Yulian Wang Xulin Wei Bo Cui Yulong Wu Yueran Zhao Jiangtao Di Qingwen Li School of nano‑technology and nano‑bionics University of Science and Technology of China230026 HefeiChina Key Laboratory of Multifunctional nanomaterials and Smart Systems Advanced Materials DivisionSuzhou Institute of Nano‑Tech and Nano‑BionicsChinese Academy of Sciences215123 SuzhouChina Division of nanomaterials and Jiangxi Key Lab of Carbonene Materials Jiangxi Institute of Nanotechnology330200 NanchangChina

Today the developed yarn muscles or actuators still cannot satisfy the requirements of working in high-temperature *** resistivity is highly needed in aerospace and industrial protection ***,an artificial muscle with high-temperature tolerance is prepared using carbon nanotube(CNT)wrapped poly(p-phenylene benzobisoxazole)(PBO)composite yarns.A thermal twisting method was utilized to reorientate the stiff PBO molecular chains into a uniform and twist-stable coiled *** CNT/PBO composite yarn muscle generates reversible contractile strokes up to 18.9%under 5.4 MPa tension and outputs 1.3 kJ kg^(-1) energy *** contrast to previous actuators,which are normally oper-ated at room temperatures,the CNT/PBO composite yarn muscles can work at ambient temperatures up to 300℃ with high contractile stroke and long-term stability.A bionic inchworm robot,a deployable structure,and smart textiles driven by the high-temperature-tolerant yarn muscles were demonstrated,showing the promise as a soft actuator towards high-temperature environment applications.

关键词： Artificial muscles Poly(p-phenylene benzobisoxazole) Carbon nanotube Thermal twisting High-temperature tolerance

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Single molecule electro-catalysis of non-fluorescent molecule

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Chinese Chemical Letters 2015年第12期26卷 1514-1517页

作者： Fei-Fei Li Jun-Nan Gu Xiao-Chun Zhou Division of Advanced nanomaterials Suzhou Institute of Nano-tech and Nano-bionics Chinese Academy of Sciences

Single molecule catalysis is very powerful in revealing catalytic mechanism at the single molecule *** fluorescent molecule is always necessary to take part into the catalysis directly in previous *** order to study the single molecule electro-catalysis of non-fluorescent molecule（SMECNFM） on nanocatalyst, we couple the SMECNFM with a single molecule fluorescence reaction. A certain number of fluorescent molecules will be generated and detected when the SMECNFM happens. Through this method, we can detect the electro-oxidation reaction of one HCOONa molecule. The stability of Pt nanocatalyst supported on active carbon is studied at the single molecule level by this method. This paper also provides a general way to make ultra-sensitive sensor, and to study the SMECNFM for the molecules,such as formic acid, hydrogen, oxygen, etc., on single nanoparticle.

关键词： catalysis powerful reactant silica stoichiometric detecting camera slide redox revealing

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