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High efficiency and thermal stability LuAG: Ce3+ converter based on phosphor-in-glass-ceramics for laser-driven lighting

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Ceramics International 2025年

作者： Qi, Yue Ye, Renguang Hua, Youjie Huang, Lishuo Jin, Can Jiang, Tianzhi Zhao, Jingtao Cai, Muzhi Li, Bingpeng Bai, Gongxun Zhao, Shilong Zhang, Junjie Xu, Shiqing College of Optical and Electronic Technology China Jiliang University Hangzhou310018 China Key Laboratory of Rare Earth Optoelectronic Materials and Devices of Zhejiang Province China Jiliang University Hangzhou310018 China

High-brightness and high-power laser lighting technology driven by blue laser diodes requires the development of thermally stable fluorescent conversion materials. Phosphor-in-glass-ceramics offers promising solutions for laser lighting applications due to their ease of synthesis and excellent thermal stability. In this study, Na2O-CaO-SiO2 (NCS) glass matrix and LuAG phosphor were combined and processed using spark plasma sintering (SPS) at 600 °C to fabricate phosphor-in-glass (PIG). By controlling the crystallization process, LuAG phosphor-in-glass-ceramics (PIGC) incorporating Na4Ca4Si6O18 microcrystals with a high crystallization degree of 89.5 % and excellent luminescent properties was successfully prepared. Compared to LuAG-PIG, the luminous flux of LuAG-PIGC has risen by 43 % under laser irradiation. LuAG-PIGC achieves the LF of 910.3 lm and the LE of 316.8 lm/W. Under an excitation of 3.35 W, he PIGC sample exhibited a surface temperature of 169.3 °C, which was 92 °C lower than that of the PIG sample without the use of an external heatsink. These results indicate that LuAG-PIGC possesses excellent thermal stability and has significant potential as novel fluorescent conversion materials for laser lighting applications. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Laser heating

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PGC Demodulation Scheme with Improved Robustness to Modulation Depth for Vibration Measurement

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IEEE Photonics technology Letters 2025年

作者： Zhu, Yunlong Jian, Yuanhao Li, Yufeng Yuan, Yonggui Dang, Fanyang Zhu, Yao Zhu, Zheng Zhang, Xiaojun Yang, Jun Harbin Engineering University Key Laboratory of Photonic Materials and Devices Physics for Oceanic Applications Ministry of Industry and Information Technology of China College of Physics and Optoelectronic Engineering Harbin150001 China Harbin Engineering University Key Laboratory of In-Fiber Integrated Optics of Ministry of Education College of Physics and Optoelectronic Engineering Harbin150001 China Guangdong University of Technology Guangdong Provincial Key Laboratory of Information Photonics Technology The School of Information Engineering The Advanced Institute of Photonic Technology Guangzhou510006 China

In this letter, the fGLIA (filtered generalized lock-in amplifier) algorithm is introduced to fiber-optic vibration measurement. The filtering procedure of the original fGLIA algorithm is changed, making it more suitable for dynamic signal measurement. Theoretically the proposed demodulation scheme is not influenced by the zeros of the Bessel functions, and can keep a good performance in a wide range of modulation depth. It is compared with PGC-Arctan demodulation scheme by simulations and experiments, showing better robustness to modulation depth error and larger range of applicable modulation depth. The experimental total harmonic distortion of demodulation results remains at about -53dB for the proposed method, while distortions may occur at certain modulation depths for PGC-Arctan. © 1989-2012 IEEE.

关键词： Vibration measurement

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一种量身定制的双锥形光纤阵列使最先进的闪烁体成为可能

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Science Bulletin 2023年第13期68卷 1342-1345页

作者：徐修文曹杰彭登峰陈冰 College of Electronic and Optical Engineering and College of Flexible Electronics(Future Technology) Nanjing University of Posts and TelecommunicationsNanjing 210023China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China

Scintillators, capable of converting X-/γ-ray to light, find widespread applications in medical diagnostics, industrial product inspection, security screening, and high-energy physics [1], [2]. Despite the significant success, the growing need of peeking deep into matters in different modalities calls for the revolution of current scintillators. Apart from the ongoing goal of reducing radiation dosage, entailing scintillators with mechanical flexibility and ultrahigh spatiotemporal resolution is now at the forefront [3], [4]. For example, if the scintillator is made flexible, three-dimensional (3D) imaging of curved objects can be enabled without the use of multi-angle scanning and algorithmic image reconstruction [5].

关键词： curved 闪烁体 dosage

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Multi-photon neuron embedded bionic skin for high-precision complex texture and object reconstruction perception research

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Opto-Electronic Advances 2025年第2期8卷 29-44页

作者： Hongyu Zhou Chao Zhang Hengchang Nong Junjie Weng Dongying Wang Yang Yu Jianfa Zhang Chaofan Zhang Jinran Yu Zhaojian Zhang Huan Chen Zhenrong Zhang Junbo Yang College of Science National University of Defense TechnologyChangsha 410073China Key Laboratory of Multimedia Communication and Network Technology in Guangxi School of ComputerElectronics and InformationGuangxi UniversityNanning 530004China College of Intelligence Science and Technology National University of Defense TechnologyChangsha 410073China College of Meteorology and Oceanography National University of Defense TechnologyChangsha 410073China Hunan Provincial Key Laboratory of Novel Nano-Optoelectronic Information Materials and DevicesNational University of Defense TechnologyChangsha 410073China College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangsha 410073China

Attributable to the complex distribution of tactile vesicles under the skin and the ability of the brain to process specific tactile parameters(shape,hardness,and surface texture),human skin can have the capacity for tactile spatial reconstruction and visualization of complex object geometry and surface ***,current haptic sensor technologies are predominantly point sensors,which do not have an interlaced distribution structure similar to that of haptic vesicles,limiting their potential in human-computer interaction ***,we report an optical microfiber array skin(OMAS)imitating tactile vesicle interlaced structures for tactile visualization and object reconstruction *** device is characterized by high sensitivity(−0.83 N/V)and fast response time(38 ms).We demonstrate that combining the signals collected by the OMAS with appropriate artificial intelligence algorithms enables the recognition of objects with different hardnesses and shapes with 100%*** also allows for the classification of fabrics with different surface textures with 98.5%accuracy and Braille patterns with 99%*** a proof-of-concept,we integrated OMAS into a robot arm to select mahjong among six common objects and successfully recognize its suits by touch,which provides a new solution for tactile sensory processing for human-computer interaction.

关键词： multiphoton neurons human-computer interaction tactile sensing tactile imaging tactile spatial reconstruction

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Roles of concentration-dependent Cu doping behaviors on the thermoelectric properties of n-type Mg_(3)Sb_(1.5)Bi_(0.5)

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Journal of Materiomics 2024年第1期10卷 154-162页

作者： Xinxin Yang Heng Ni Xiaotong Yu Biao Cao Juanjuan Xing Qiyong Chen Lili Xi Jiandang Liu Jiye Zhang Kai Guo Jing-Tai Zhao School of Materials Science and Engineering Shanghai University99 Shangda RoadShanghai200444China Materials Genome Institute Shanghai University99 Shangda RoadShanghai200444China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefeiAnhui230026China School of Physics and Materials Science Guangzhou UniversityGuangzhou510006China Research Center for Advanced Information Materials(CAIM) Huangpu Research&Graduate School of Guangzhou UniversitySino-Singapore Guangzhou Knowledge CityHuangpu DistrictGuangzhou510555China Key Lab of Si-based Information Materials&Devices and Integrated Circuits Design Department of Education of Guangdong ProvinceChina School of Materials Science and Engineering Guilin University of Electronic TechnologyGuilin541004China Guangxi Key Laboratory of Information Materials Guilin University of Electronic TechnologyGuilin541004China

Large Seebeck coefficients induced by high degeneracy of conduction band minimum,and low intrinsic lattice thermal conductivity originated from large lattice vibrational anharmonicity render Mg_(3)Sb_(2)as a promising n-type thermoelectric ***,we demonstrated unique concentration-dependent occupation behaviors of Cu in Mg_(3.4)Sb_(1.5)Bi_(0.49)Te_(0.01)matrix,evidenced by structural characterization and transport property *** is found that Cu atoms prefer to enter the interstitial lattice sites in Mg_(3)Sb_(2)host with low doping level(Mg_(3.4)Sb_(1.5)Bi_(0.49)Te_(0.01)+x%Cu,x<0.3%),acting as donors for providing additional electrons without deteriorating the carrier *** x is larger than 0.3%,the excessive Cu atoms are inclined to substitute Mg atoms,yielding acceptors to decrease the electron *** a result,the electrical conductivity of the Mg_(3.4)Sb_(1.5)Bi_(0.49)Te_(0.01)+0.3%Cu sample reaches 2.3×10^(4)S/m at 300 K,increasing by 300%compared with that of the pristine *** figure of merit zT values in the whole measured temperature range are significantly improved by the synergetic improvement of power factor and reduction of thermal *** average zT∼1.07 from 323 K to 773 K has been achieved for the Mg_(3.4)Sb_(1.5)Bi_(0.49)Te_(0.01)+0.3%Cu sample,which is about 30%higher than that of the Mg_(3.4)Sb_(1.5)Bi_(0.49)Te_(0.01) sample.

关键词： Mg_(3)Sb_(2) Cu doping Concentration-dependent occupation Thermoelectric properties Average zT

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Sensitivity analysis of carbon dioxide inversion in near-infrared spectra for TanSat-2 satellite 3

Sensitivity analysis of carbon dioxide inversion in near-inf...

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3rd International Conference on Remote Sensing, Surveying, and Mapping, RSSM 2024

作者： Bai, Zhaoming Wang, Xiaolin Gao, Peng Liu, Dongdong Fan, Meng Ai, Jingjing Shandong Engineering Research Center of New Optoelectronic Information Technology and Devices School of Mathematics and Physics Qingdao University of Science and Technology Qingdao266061 China School of Science Xi’an Polytechnic University Shaanxi Xi’an710048 China State Key Laboratory of Remote Sensing Science Aerospace Information Research Institute Chinese Academy of Sciences Beijing100101 China

ISBN: (数字)9781510680081

ISBN: (纸本)9781510680074

The inherent uncertainties of input parameters in satellite may affect the inversion accuracy of the column-averaged dry-air mole fractions of carbon dioxide (XCO2). Regarding the design specifications of the next-generation carbon satellite (Tansat-2), a sensitivity analysis is conducted on seven input parameters that may affect the XCO2 inversion. The paper employs the SCIATRAN model to retrieve XCO2 from short-wave infrared spectra with central the wavelengths at 0.76 μm and 1.61 μm. The results indicate that, considering the uncertainties in measuring these parameters, the parameters influencing XCO2 inversion are ranked in the following order: the pressure, oxygen, temperature, water vapor, surface elevation, surface albedo, and ozone. To achieve the XCO2 inversion accuracy within the range of 0.3%-0.5%, it is necessary to ensure the temperature uncertainty of approximately 0.4 K-0.8 K, the pressure uncertainty of approximately 0.2%-0.4%, the water vapor uncertainty of approximately 7%-14%, the oxygen uncertainty of approximately 0.25%-0.5%, along with the surface albedo uncertainty of approximately 0.2-0.4, and the surface elevation uncertainty of approximately 22.5 m-45 m. © 2024 SPIE.

关键词： Sensitivity analysis

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Acid-induced topological morphology modulation of graphitic carbon nitride homojunctions as advanced metal-free catalysts for OER and pollutant degradation

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Journal of Materials Science & technology 2021年第27期86卷 210-218页

作者： Hua-Wei Zhang Yi-Xin Lu Bo Li Gui-Fang Huang Fan Zeng Yuan-Yuan Li Anlian Pan Yi-Feng Chai Wei-Qing Huang Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education&Hunan Provincial Key Laboratory of Low-Dimensional Structural Physics and Devices School of Physics and ElectronicsHunan UniversityChangsha410082China College of Materials Science and Engineering Hunan UniversityChangshaHunan410082China School of Physics and Electronics Science Hunan University of Science and TechnologyXiangtan411201China

Topological morphology that dominates the surface electronic properties of nanostructures plays a key role in producing desired materials for versatile functions and applications in many fields,but its modulation for specific functions remains a big ***,we report an acid-induced method to prepare S-doped graphitic carbon nitride/graphitic carbon nitride(S-CN/CN)homojunction by simply pyrolyzing a supramolecular precursor synthesized from melamine and H_(2)SO_(4).The topological morphology and electronic structure of CN homojunction can be easily adjusted only by changing the ratio of raw ***,the topological morphology of S-CN/CN homojunction can be further adjusted from hollow cocoon to 2D nanosheets by changing the annealing *** optimized S-CN/CN homojunction shows highly efficient in charge transfer and separation and exhibits superior OER activity and high ability to degrade organic ***,S-CN/CN nanosheets only demand low overpotential of301 m V to drive a current density of 10 m Acm^(-2)in 1 M KOH media,and the corresponding Tafel slope is only 57.71 m V/dec,which is superior to the most advanced precious metal Ir O_(2)***,under visible light irradiation,its photodegradation kinetic rate of Rh B is 2.38,which is 47.6 times higher than that of bulk *** work provides useful guidance for designing and developing efficient multifunctional metal-free catalysts.

关键词： Topological morphology Acid-induced Molecular self-assembly S-CN/CN homojunction OER

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Bifacial passivation towards efficient fapbbr3-based inverted perovskite light-emitting diodes

Bifacial passivation towards efficient fapbbr3-based inverte...

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International Conference on Display technology, ICDT 2020

作者： Li, Miaozi Peng, Junbiao Wang, Jian Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou510640 China

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Novel high-gain InGaN/GaN visible-light photodetectors using polarization self-depletion and quasi-superlattices-induced photoconductive gain

Novel high-gain InGaN/GaN visible-light photodetectors using...

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2024 International Conference on optoelectronic Information and Functional Materials, OIFM 2024

作者： Xu, Haoming Lv, Zesheng Jiang, Hao School of Electronics and Information Technology Sun Yat-sen University Guangdong Guangzhou510006 China State Key Laboratory of Optoelectronic Materials and Technologies Sun Yat-sen University Guangdong Guangzhou510006 China Guangdong Engineering technology R&D Center of Compound Semiconductors and Devices Sun Yat-sen University Guangdong Guangzhou510006 China

ISBN: (纸本)9781510680517

We proposed and fabricated an InGaN/GaN visible-light heterojunction photodetector with ultrahigh gain based on polarization self-depletion and quasi-superlattices (QSLs) induced photoconductive gain. In the detector, the polarization induced electric field is used to deplete the InGaN/GaN QSL absorber, serving as an internal photogate. On the other hand, the QSLs with the specific quantum barrier width can localize the photogenerated holes, thereby generating additional photoconductive gain. Benefitted from these two effects, the peak optical gain and responsivity of the photodetector reach 5.8×104 and 1.9×104 A/W respectively, under 5 V bias and 402 nm illumination. Meanwhile, the photodetectors indicate excellent weak-light detection capability, as well as a remarkable wavelength selectivity with 402 nm/500 nm rejection ratio surpassing 1×104 © 2024 SPIE.

关键词： Photons

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Experimental observations of naturally occurring dust using a high-speed vacuum ultraviolet imaging system in EAST

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Plasma Science and technology 2023年第5期25卷 1-7页

作者：侯善伟明廷凤石奇奇张文敏龙飞飞李邦邓荣婧庄清刘晓菊张凌提昂曾龙李国强 Naoko ASHIKAWA Satoshi OHDACHI 高翔 Anhui University Hefei 230601People’s Republic of China Institute of Plasma Physics Chinese Academy of SciencesHefei 230031People’s Republic of China University of Science and Technology of China Hefei 230026People’s Republic of China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Optoelectronic EngineeringShenzhen UniversityShenzhen 518060People’s Republic of China Hangzhou Dianzi University Hangzhou 310018People’s Republic of China National Institute for Fusion Sciences Toki 509-5292Japan SOKENDAI Toki 509-5292Japan

In the ELMy H-mode experiment,naturally occurring dust originating at the high-field side is clearly observed using the high-speed vacuum ultraviolet imaging system developed on the Experimental Advanced Superconducting Tokamak(EAST).The main ablation cloud shape is similar to the classical shape observed in pellet fueling ***,during the dust penetration,an erupted secondary cloudlet with a bent‘cigar’shape is observed and moves upwards along the direction perpendicular to the magnetic field line,which is different to the obviation in the pellet fueling *** may be due to the ion diamagnetic drift *** velocities of the secondary cloudlet are estimated to be 50–80 m s^(-1).In addition,a significant degradation of the plasma confinement is observed during the dust penetration.

关键词： H-mode HFS VUVI EAST tokamak dust cloudlet

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