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High-speed gan-based laser diode with modulation bandwidth exceeding 5 GHz for 20 Gbps visible light communication

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Photonics Research 2024年第6期12卷 1186-1193页

作者： JUNFEI WANG JUNHUI HU CHAOWEN GUAN YUQI HOU ZENGYI XU LEIHAO SUN YUE WANG YUNING ZHOU boon S.OOI JIANYANG SHI ZIWEI LI JUNWEN ZHANG NAN CHI SHAOHUA YU CHAO SHEN School of Information Science and Technology Fudan UniversityShanghai 200433China Peng Cheng Laboratory Shenzhen 518000China ZGC Institute of Ubiquitous-X Innovation and Applications Beijing 100876China Photonics Laboratory King Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Saudi Arabia

Visible light communication(VLC)based on laser diodes demonstrates great potential for high data rate maritime,terrestrial,and aerial wireless data ***,we design and fabricate high-speed blue laser diodes(LDs)grown on c-plane gallium nitride(gan)*** was achieved through active region design and miniaturization toward a narrow ridge waveguide,short cavity length,and single longitudinal mode Fabry–Perot laser *** fabricated mini-LD has a low threshold current of 31 mA and slope efficiency of 1.02 W/A.A record modulation bandwidth of 5.9 GHz(−3dB)was measured from the *** the developed mini-LD as a transmitter,the VLC link exhibits a high data transmission rate of 20.06 Gbps adopting the bit and power loading discrete multitone(DMT)modulation *** corresponding bit error rate is 0.003,satisfying the forward error correction *** demonstrated gan-based mini-LD has significantly enhanced data transmission rates,paving the path for energy-efficient VLC systems and integrated photonics in the visible regime.

关键词： communication diode waveguide

Multiplex real-time PCR revealed very high prevalence of soil-transmitted helminth infections among aborigines in Peninsular Malaysia

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Asian Pacific Journal of Tropical Medicine 2020年第12期13卷 550-556页

作者： Nurulhasanah Othman Noorizan Miswan Weng-kin Wong boon-huat Lim Rahmah Noordin Institute for Research in Molecular Medicine Universiti Sains Malaysia11800 PenangMalaysia School of Health Sciences Universiti Sains Malaysia16150 KelantanMalaysia

Objective:To determine the true prevalence of soil-transmitted helminth infections in the Malaysian aborigines using real-time ***:A total of 122 aborigines from seven tribes were recruited from settlements and nearby hospitals which served the communities,located in four states in Peninsular *** stool samples were examined for the presence of soil-transmitted helminth using real-time PCR and *** latter included the direct wet mount and formalin-ether concentration technique(FECT).The infection load in FECT-positive samples was determined by the Kato-Katz *** real-time analyzer detected five helminth species using two sets of ***:The real-time PCR detected soil-transmitted helminth in 98.4% samples(n=122),which were 1.56 times higher than by *** lumbricoides and Trichuris trichiura were detected in more than 90% of the samples,while hookworm was detected in 46.7%(Necator americanus) and 13.9%(Ancylostoma sp.)of the *** with previous reports on the Malaysian aborigines showed that the real-time PCR markedly improved the detection of Ascaris lumbricoides,hookworm and Strongyloides *** real-time PCR detected poly-helminths in 92.6%of the samples compared to 28.7% by *** addition,27 samples(22.1%) showed amplification of Strongyloides stercoralis ***:The real-time PCR showed very high prevalence rates of soil-transmitted helminth infections in the aborigines and is the recommended method for epidemiological investigation of soiltransmitted helminth infections in this population.

关键词： prevalence infections markedly

Polarization-induced photocurrent switching effect in heterojunction photodiodes

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Nano Research 2023年第4期16卷 5503-5510页

作者： Dingbo Chen Yu-Chang Chen Guang Zeng Yu-Chun Li Xiao-Xi Li Dong Li Chao Shen Nan Chi boon S.Ooi David Wei Zhang Hong-Liang Lu State Key Laboratory of ASIC and System Shanghai Institute of Intelligent Electronics&SystemsSchool of MicroelectronicsFudan UniversityShanghai 200433China Key Laboratory for Information Science of Electromagnetic Waves Department of Communication Science and EngineeringFudan UniversityShanghai 200433China Photonics Laboratory Division of ComputerElectricaland Mathematical Sciences and EngineeringKing Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Kingdom of Saudi Arabia

The unipolar photocurrent in conventional photodiodes(PDs)based on photovoltaic effect limits the output modes and potential versatility of these devices in *** photodiodes with photocurrent switching are emerging as a promising solution for obtaining photoelectric devices with unique and attractive functions,such as optical logic ***,we design an all-solid-state chip-scale ultraviolet(UV)PD based on a hybrid gan heterojunction with engineered bipolar polarized electric *** introducing the polarization-induced photocurrent switching effect,the photocurrent direction can be switched in response to the wavelength of incident light at 0 V *** particular,the photocurrent direction exhibits negative when the irradiation wavelength is less than 315 nm,but positive when the wavelength is longer than 315 *** device shows a responsivity of up to−6.7 mA/W at 300 nm and 5.3 mA/W at 340 nm,*** particular,three special logic gates in response to different dual UV light inputs are demonstrated via a single bipolar PD,which may be beneficial for future multifunctional UV photonic integrated devices and systems.

关键词： gan heterostructure ultraviolet(UV)photodiodes bipolar photocurrent optical logic device

Detection of Entamoeba histolytica in experimentally induced amoebic liver abscess:comparison of three staining methods

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Asian Pacific Journal of Tropical Biomedicine 2012年第1期2卷 61-65页

作者： Tan Zi Ning Wong Weng kin Shaymoli Mustafa Arefuddin Ahmed Rahmah Noordin Tan Gim Cheong Olivos-Garcia Alfonso Lim boon Huat School of Health Sciences Universiti Sains Malaysia Institute for Research in Molecular Medicine Universiti Sains Malaysia Department of Medical Microbiology ParasitologySchool of Medical SciencesUniversiti Sains Malaysia Departamento de Medicina Experimental Facultad de Medicina.Universidad National Autonoma de Mexico

Objective:To compare the efficacy of three different tissue stains,namely haematoxylin and eosin(H&E),periodic-acid Schiff(PAS)and immunohistochemical(1HC)stains for detection of Entamoeba histolytica(***)trophozoites in abscessed liver tissues of ***:Amoebic liver abscess was experimentally induced in a hamster by injecting 1×10~6of axenically cultured virulent *** trophozoites(HM1-IMSS strain)into the portal *** a week post-inoculation,the hamster was sacrificed and the liver tissue sections were stained with H&E,PAS and IHC stains to delect the amoebic ***:The three stains revealed tissue necrosis and amoebic trophozoites,but with varying clarity.H&E and PAS stained the trophozoites pink and magenta,respectively,however it was difficult to differentiate the stained trophozoites from the macrophages because of their similarity in size and *** the other hand,IHC stain revealed distinct brown appearance of the trophozoites in the infected liver ***:It can be concluded that out of the three *** is the best for identification of *** trophozoites in tissue sections.

关键词： Entamoeba histolytica Amoebic liver abscess H&E PAS IHC Trophozoite

Entamoeba histolytica acetyl-CoA synthetase:biomarker of acute amoebic liver abscess

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Asian Pacific Journal of Tropical Biomedicine 2014年第6期4卷 446-450页

作者： Lim boon Huat Alfonso Olivos Garcia Tan Zi Ning Wong Weng kin Rahmah Noordin Siti shafiqah Anaqi Azham Lee zhi Jie Guee Cher Ching Foo Phiaw Chong Pim Chau Dam Biomedicine Programme.School of Health Sciences Universiti Sains Malaysia Departmento de Medicina Experimental Facultad de MedicinaUniversidad Nacional Autonoma de Mexico Department of Medicine Allianze University College of Medical Sciences Institute for Research in Molecular Medicine 11800 University Sains Malaysia

Objective:To characterize the Entamoeba histolytica(***)antigen(s)recognized by moribound amoebic liver abscess ***:Crude soluble antigen of *** was probed with sera of moribund hamsters in 1D-and 2D-Westem blot *** antigenic protein was then sent for tandem mass spectrometry *** corresponding gene was cloned and expressed in Escherichia coli BL21-AI to produce the recombinant *** ADP-forming acetyl-CoA synthetase(EhACS)protein.A customised ELISA was developed to evaluate the sensitivity and specificity of the recombinant ***:A^75 kDa protein band with a pl value of 5.91-6.5 was found to be antigenic;and not detected by sera of hamsters in the control *** mass spectrometry analysis revealed the protein to be the 77 kDa *** ADP-forming acetyl-CoA synthetase(EhACS).The customised ELISA results revealed 100%sensitivity and 100%specificity when tested against infected(n=31)and control group hamsters(n=5)serum samples,***:This rinding suggested the significant role of EhACS as a biomarker for moribund hamsters with acute amoebic liver abscess(ALA)*** is deemed pertinent that future studies explore the potential roles of EhACS in better understanding the pathogenesis of ALA;and in the development of vaccine and diagnostic tests to control ALA in human populations.

关键词： Entamoeba histolytica Amoebic liver abscess Biomarker Acetyl-CoA synthetase Recombinant EhACS Western blot

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供应链中断对汽车企业股票价格的影响

管理评论 2015年第10期27卷 173-182页

作者：舒彤杨芳陈收汪寿阳黎建强甘露湖南大学工商管理学院长沙410082 中国科学院数学与系统科学研究院北京100190 陕西师范大学国际商学院西安710062 香港城市大学管理科学系湖南大学社会科学处长沙410082

文章采用事件分析法对3.11日本大地震引起的日本及中国汽车行业股票价格波动进行分析,通过计算地震发生前后股票异常收益来衡量企业股票价格所受冲击,而回归分析用来研究地震对日本汽车行业股票价格冲击的影响因素。实证结果表明,地震... 详细信息

文章采用事件分析法对3.11日本大地震引起的日本及中国汽车行业股票价格波动进行分析,通过计算地震发生前后股票异常收益来衡量企业股票价格所受冲击,而回归分析用来研究地震对日本汽车行业股票价格冲击的影响因素。实证结果表明,地震造成的供应链中断事件对股票价格存在显著的负向影响,而中日所受的这种影响程度有所区别;流动比率对地震事件无任何显著影响,而存货周转率和毛利率较高的企业,对地震产生的负向冲击有缓解作用。

关键词：供应链中断股票异常收益事件研究法回归分析

基于RFID技术投资医药冷链配送中心选址—库存研究

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科技管理研究 2016年第20期36卷 220-225页

作者：舒彤王改改汪寿阳陈收黎建强甘露湖南大学工商管理学院湖南长沙410082 中国科学院数学与系统科学研究院北京100190 陕西师范大学国际商学院陕西西安710062 香港城市大学管理科学系香港999077 湖南大学社会科学处湖南长沙410082

研究需求不确定下,RFID技术投资前后医药冷链配送中心的选址—库存问题。在现有配送中心选址—库存模型基础上,结合医药冷链行业特点,对原有模型进行改善,建立一定服务水平下,医药冷链配送中心选址—库存模型。采用遗传算法求解模型,当... 详细信息

研究需求不确定下,RFID技术投资前后医药冷链配送中心的选址—库存问题。在现有配送中心选址—库存模型基础上,结合医药冷链行业特点,对原有模型进行改善,建立一定服务水平下,医药冷链配送中心选址—库存模型。采用遗传算法求解模型,当参数一定时,依据计算结果可确定最优选址、配送及库存方案。通过对影响模型的主要参数进行敏感性分析,为医药冷链配送系统是否投资RFID技术提供决策参考。

关键词： RFID技术选址—库存遗传算法医药冷链物流配送中心

Large-scale and high-quality Ⅲ-nitride membranes through microcavity-assisted crack propagation by engineering tensile-stressed Ni layers

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Opto-Electronic Science 2022年第10期 45-55页

作者： Jung-Hong Min Kwangjae Lee Tae-Hoon Chung Jung-Wook Min Kuang-Hui Li Chun Hong Kang Hoe-Min Kwak Tae-Hyeon Kim Youyou Yuan Kyoung-Kook Kim Dong-Seon Lee Tien Khee Ng boon S.Ooi Photonics Laboratory Computer Electrical and Mathematical Sciences and Engineering Division (CEMSE) King Abdullah University of Science and Technology (KAUST) Department of Electrical Engineering Stanford University Light Source Research Division Korea Photonics Technology Institute (KOPTI) School of Electrical Engineering and Computer Science Gwangju Institute of Science and Technology Department of Advanced Convergence Technology Research Institute of Advanced Convergence Technology Korea Polytechnic University king Abdullah University of Science and Technology (KAUST)

Epitaxially grown Ⅲ-nitride alloys are tightly bonded materials with mixed covalent-ionic bonds. This tight bonding presents tremendous challenges in developing Ⅲ-nitride membranes, even though semiconductor membranes can provide numerous advantages by removing thick, inflexible, and costly substrates. Herein, cavities with various sizes were introduced by overgrowing target layers, such as undoped gan and green LEDs, on nanoporous templates prepared by electrochemical etching of n-type gan. The large primary interfacial toughness was effectively reduced according to the design of the cavity density, and the overgrown target layers were then conveniently exfoliated by engineering tensile-stressed Ni layers. The resulting Ⅲ-nitride membranes maintained high crystal quality even after exfoliation due to the use of gan-based nanoporous templates with the same lattice constant. The microcavity-assisted crack propagation process developed for the current Ⅲ-nitride membranes forms a universal process for developing various kinds of largescale and high-quality semiconductor membranes.

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Large-scale and high-quality III-nitride membranes through microcavity-assisted crack propagation by engineering tensile-stressed Ni layers

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Opto-Electronic Science 2022年第10期1卷 51-61,42-50页

作者： Jung-Hong Min Kwangjae Lee Tae-Hoon Chung Jung-Wook Min Kuang-Hui Li Chun Hong Kang Hoe-Min Kwak Tae-Hyeon Kim Youyou Yuan Kyoung-Kook Kim Dong-Seon Lee Tien Khee Ng boon S.Ooi Photonics Laboratory ComputerElectrical and Mathematical Sciences and Engineering Division(CEMSE)King Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Saudi Arabia Department of Electrical Engineering Stanford UniversityStanfordCA 94305USA Light Source Research Division Korea Photonics Technology Institute(KOPTI)Gwangju 61007Republic of Korea School of Electrical Engineering and Computer Science Gwangju Institute of Science and TechnologyGwangju 61005Republic of Korea Department of Advanced Convergence Technology Research Institute of Advanced Convergence TechnologyKorea Polytechnic University237 Sangidaehak-roSiheung-si 15073Republic of Korea king Abdullah University of Science and Technology(KAUST) Thuwal 23955-6900Saudi Arabia

Epitaxially grown III-nitride alloys are tightly bonded materials with mixed covalent-ionic *** tight bonding presents tremendous challenges in developing III-nitride membranes,even though semiconductor membranes can provide numerous advantages by removing thick,inflexible,and costly ***,cavities with various sizes were introduced by overgrowing target layers,such as undoped gan and green LEDs,on nanoporous templates prepared by electrochemical etching of n-type *** large primary interfacial toughness was effectively reduced according to the design of the cavity density,and the overgrown target layers were then conveniently exfoliated by engineering tensile-stressed Ni *** resulting III-nitride membranes maintained high crystal quality even after exfoliation due to the use of gan-based nanoporous templates with the same lattice *** microcavity-assisted crack propagation process developed for the current III-nitride membranes forms a universal process for developing various kinds of large-scale and high-quality semiconductor membranes.

关键词： III-nitride alloys membranes nanoporous Ni stressor light-emitting diodes ultraviolet photodetectors