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Low-Voltage IGZO Field-Effect Ultraviolet Photodiode

Chinese physics Letters 2024年第6期41卷 156-161,I0001-I0003页

作者：宋双梁会力霍文星张广张永晖王绩梅增霞 Songshan Lake Materials Laboratory Dongguan 523808China Institute of physics Chinese Academy of SciencesBeijing 100190China College of Physics Liaoning UniversityShenyang 110036China Department of Instruments Science and Technology School of Precision Instrument and Opto-electronics EngineeringTianjin UniversityTianjin 300072China National Key Laboratory of Scattering and Radiation Beijing 100039China School of physics and Optoelectronic Engineering Shandong University of TechnologyZibo 255000China

In the era of Internet of Things(Io Ts),an energy-efficient ultraviolet(UV)photodetector(PD)is highly desirable considering the massive usage scenarios such as environmental sterilization,fire alarm and corona discharge monitoring.So far,common self-powered UV PDs are mainly based on metal-semiconductor heterostructures or p–n heterojunctions,where the limited intrinsic built-in electric field restricts further enhancement of the photoresponsivity.In this work,an extremely low-voltage field-effect UV PD is proposed using a gatedrain shorted amorphous IGZO(a-IGZO)thin film transistor(TFT)architecture.A combined investigation of the experimental measurements and technology computer-aided design(TCAD)simulations suggests that the reverse current(ⅠR)of field-effect diode(FED)is highly related with the threshold voltage(Vth)of the parental TFT,implying an enhancement-mode TFT is preferable to fabricate the field-effect UV PD with low dark current.Driven by a low bias of-0.1 V,decent UV response has been realized including large UV/visible(R_(300)/R_(550))rejection ratio(1.9×10^(3)),low dark current(1.15×10^(-12)A)as well as high photo-to-dark current ratio(PDCR,~10^(3))and responsivity(1.89 A/W).This field-effect photodiode provides a new platform to construct UV PDs with well-balanced photoresponse performance at a low bias,which is attractive for designs of large-scale smart sensor networks with high energy efficiency.

关键词： IGZO attractive ultraviolet

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Preliminary Design of a System for Picking up Audio-Signals From Bubble Detectors GAO Si-ze1,NI Bang-fa,ZHANG Gui-ying,XIAO Cai-jin,LIU Cun-xiong, CHEN Zhe1,NIE Peng,LIU Chao1,ZHAO Chang-jun (1.College of Physics Science and Engineering Technology,Guang

Preliminary Design of a System for Picking up Audio-Signals ...

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作者： GAO Si-ze NI Bang-fa ZHANG Gui-ying XIAO Cai-jin LIU Cun-xiong CHEN Zhe NIE Peng LIU Chao ZHAO Chang-jun College of Physics Science and Engineering Technology Guangxi University

This system is designed to pick up sound signals from large volume,low-threshold energy, low-background superheated droplets bubble detectors.A sound-sensitive bubble detector is composed of a container filled with a mixture of superheated droplets and gel,a temperature and pressure control system,and an audio acquisition system attached on the outer surface of the container.The superheated droplets are in a metastable and superheated state at ambient temperature and pressure.When the outside

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基于室温铁磁性的(Fe,Al)共掺杂SiGe铁磁pn二极管的可调整流和磁阻特性

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Science China Materials 2024年第2期67卷 573-579页

作者：李加飞张析向钢 College of Physics Sichuan UniversityChengdu 610064China

Ⅳ族稀磁半导体因其优异的磁电性能,以及在与当前主流半导体集成技术兼容的自旋电子器件中具有广阔的应用前景而受到越来越多的关注.事实上,具有室温铁磁性的Ⅳ族稀磁半导体及其衍生器件更有望在实际中得以应用.本工作设计并制备了基于p... 详细信息

Ⅳ族稀磁半导体因其优异的磁电性能,以及在与当前主流半导体集成技术兼容的自旋电子器件中具有广阔的应用前景而受到越来越多的关注.事实上,具有室温铁磁性的Ⅳ族稀磁半导体及其衍生器件更有望在实际中得以应用.本工作设计并制备了基于p型(Fe,Al)共掺杂SiGe薄膜和n型Ge衬底的磁性pn二极管.磁性测量以及磁阻和反常霍尔效应测试揭示了p型(Fe,Al)共掺杂SiGe薄膜的室温铁磁性.有趣的是,磁性pn异质结表现出磁场可调的整流和磁阻行为.我们的研究结果为制备具有室温铁磁性的Ⅳ族稀磁半导体提供了一种可选策略,并为Ⅳ族稀磁半导体的实际自旋电子应用提供了范例.

关键词： diluted magnetic semiconductor SiGe pn junction rectification magnetoresistance

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The Synthetic and Mechanical Properties of a Silica Matrix Cermet Composite

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Journal of Wuhan University of Technology(Materials Science) 2022年第3期37卷 423-428页

作者： Sufian H Humeedi Saadoon M Abdulkareem Salih Y Darweesh Department of physics College of ScienceTikrit UniversityTikritIraq physics Department College of EducationSamaraa UniversitySamaraaIraq physics Department College of Education TuzKhurmatuTikrit UniversityTikritIraq

A cermet composite was prepared by employing thermal spraying flame onto stainless steel surfaces of(304)type.Hence 25,50%of aluminum was mixed with matrix of(10%Al_(2)O_(3)-SiO_(2)).A spray system consistis of oxygen barrel,acetylene and spray gun that contains powders feeder at different spray distances(5,10,15,20 and 25 cm).The thermal treatment of the samples resulting from spraying was performed at 1100℃for 1.5 hr.Some physical examinations(porosity and adhesion),mechanical tests(hardness and wear rate)and Atomic Force Microscope(AFM)test were performed before and after thermal treatment.The test results showed that the best mixing rate was(50%)and the best spray distance was(15cm)where the quality of coating layer improved after thermal treatment at 1100℃for 1.5 hr with a porosity ratio reduced from 11.2%to 6.6%,and adhesion strength improved with the increase in the alumina content to 50%.The results demonstrated that the best adhesion value after thermal treatment was 30.98 MPa.The hardness of coating layer increased from 45.78 to 54.88 HV;while the lowest rate of wear was at 50%of alumina with a spray distance of 15cm.Also,there was a clear improvement based on AFM within grain size,root mean square and roughness rate.

关键词： spraying by flame ceramic oxides composites atomic force microscope

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Microstructure of charged AdS black hole with minimal length effects

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Chinese physics C 2022年第12期46卷 298-311页

作者：白宁晨贺奥运陶军 Center for Theoretical physics College of PhysicsSichuan UniversityChengdu 610065China

In this work,the microstructure of charged AdS black holes under minimal length effects is investigated.We study the thermodynamics of black holes in the extended phase space,where the cosmological constant is regarded as the thermodynamic pressure.The modified Hawking temperature and phase transition are obtained based on the generalized uncertainty principle(GUP).Then,using thermodynamic geometry,the microstructure of black holes can be determined by the ratio of the GUP parameter to charge.For a small ratio,the black hole exhibits the typical RN-AdS microstructure with van der Waals phase transition and repulsive/attractive interactions.As the ratio increases,the reentrant phase transition is observed,and both the repulsion-attraction coexisted and the attraction dominated black holes are noted.For a large ratio,the black hole behaves like a Schwarzchild-AdS black hole in which neither phase transition nor repulsive interaction are observed.These results suggest that the GUP effect will reduce the repulsive interaction presented by the charged AdS black hole.

关键词： black hole microstructure generalized uncertainty principle black hole thermodynamics

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Fringe visibility and correlation in Mach–Zehnder interferometer with an asymmetric beam splitter

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Chinese physics B 2022年第11期31卷 225-230页

作者：刘彦军王美亚相忠诚吴海滨 College of Physics Mechanical and Electronical CollegeShijiazhuang UniversityShijiazhuang 050035China Institute of physics Chinese Academy of SciencesBeijing 100190China

We study the wave–particle duality in a general Mach–Zehnder interferometer with an asymmetric beam splitter from the viewpoint of quantum information theory.The correlations(including the classical correlation and the quantum correlation)between the particle and the which-path detector are derived when they are in pure state or mixed state at the output of Mach–Zehnder interferometer.It is found that the fringe visibility and the correlations are effected by the asymmetric beam splitter and the input state of the particle.The complementary relations between the fringe visibility and the correlations are also presented.

关键词： wave-particle duality fringe visibility correlation general Mach-Zehnder interferometer

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Vibrational Spectroscopic Study of N-[4-[1-Hydroxy-2-[(1-Methyl Ethyl)Amino]Ethyl]Phenyl]Methane Sulfonamide

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光谱学与光谱分析 2016年第3期36卷 880-886页

作者： N.Balamurugan S.Sampathkrishnan C.Charanya Department of physics Sri Lakshmi Ammaal Engineering College Department of physics Sri Venkateswara College of Engineering Research Scholar Department of PhysicsSri Venkateshwara College of Engineering

The vibrational spectral analysis was carried out by using FT-Raman and FT-IR spectroscopy in the range 4 000~400and 4 000~400cm-1 respectively,for N-[4-[1-hydroxy-2-[(1-methyl ethyl)amino]ethyl]phenyl]methane sulfonamide(HPAEPMS)molecule.Theoretical calculations were performed by ab initio Density Functional Theory(DFT)method using 6-31G(d,p)basis set.The complete vibrational assignments of wavenumbers were made on the basis of potential energy distribution(PED).The results of the calculations were applied to simulated spectra of the title compound,which show excellent agreement.

关键词： FT-IR FT-Raman DFT Vibrational analysis

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Dynamically controlled optical nonreciprocity of a double-ladder system with spontaneously generated coherence in moving atomic optical lattice

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Chinese physics B 2017年第5期26卷 170-176页

作者：巴诺吴向尧李东飞王丹费金有王磊 College of Physics Jilin Normal University College of Physics Jilin University

A four-level double-ladder cold atoms system with spontaneously generated coherence trapped in a moving optical lattice is explored to achieve optical nonreciprocity. When spontaneously generated coherence（SGC） is present, the remarkable contrast optical nonreciprocity of light transmission and reflection can be generated at each induced photonic bandgap in the optical lattice with a velocity of a few m/s. However, when the SGC effect is absent, the optical nonreciprocity becomes weak or even vanishing due to the strong absorption. It is found that the optical nonreciprocity is related to the asymmetric Doppler effect in transmission and reflection, meanwhile the degree and position of optical nonreciprocity can be tuned by the SGC effect and the Rabi frequency of the trigger field.

关键词： coherence spontaneously ladder trapped resonant dipole transparency vanishing photonic absolute

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Influence of particle packing structure on sound velocity

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Chinese physics B 2018年第10期27卷 386-394页

作者：赵闯李成波鲍琳 College of Physics Guizhou University college of Mathematics and physics Anyang Institute of Technology

The anisotropy in the particle systems of different packing structures affects the sound velocity. The acoustic propagation process in four kinds of packing structures（denoted as S45, H60, S90, and D） of two-dimensional granular system is simulated by the discrete element method. The velocity vtof obtained by the time of flight method and the velocity vc obtained from the stiffness tensor of the system are compared. Different sound velocities reflect various packing structures and force distributions within the system. The compression wave velocities of H60 and S90 are nearly the same, and transmit faster than that of D packing structure, while the sound velocity of S45 is the smallest. The shear wave velocities of S45 and H60 are nearly the same, and transmit faster than that of D packing structure. The compression wave velocity is sensitive to the volume fraction of the structure, however, the shear wave velocity is more sensitive to the geometrical structure itself. As the normal stress p is larger than 1 MPa, vtof and vc are almost equal, and the stiffness tensors of various structures explain the difference of sound velocities. When the normal stress is less than 1 MPa, with the coordination number unchanged, the law vtof ∝ p^1/4 still exists. This demonstrates that apart from different power laws between force and deformation as well as the change of the coordination number under different stresses, there are other complicated causes of vtof∝ p^1/4, and an explanation of the deviation from vtof ∝ p^1/6 is given from the perspective of dissipation.

关键词： discrete element method acoustic propagation packing structure stiffness tensor

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卤化物固体电解质新家族实现全固态金属锂电池

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Science Bulletin 2023年第15期68卷 1598-1599页

作者：赵宁郭向欣 College of Physics Qingdao UniversityQingdao 266071China

The worldwide research on all-solid-state lithium batteries(ASSLBs)flourished in the past decade due to the strong demand for high energy density and safe electrochemical energy storage.Deep understanding of the funda... 详细信息

关键词：固体电解质金属锂电池 lithium

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