检索结果-内蒙古大学图书馆

SSRN 2022年

作者： Han, Dan Chen, Yi Li, Donghui Dong, Hailiang Xu, Bingshe Sang, Shengbo He, Xiuli Shanxi Key Laboratory of Micro Nano Sensors & Artificial Intelligence Perception College of Information and Computer Taiyuan University of Technology Taiyuan030024 China Key Lab of Advanced Transducers and Intelligent Control System Ministry of Education Taiyuan030024 China Key Laboratory of Interface Science and Engineering in Advanced Materials Taiyuan University of Technology Ministry of Education Taiyuan030024 China State Key Laboratory of Transducer Technology Aerospace Information Research Institute Chinese Academy of Sciences Beijing100190 China Shanxi Research Institute of 6D Artificiat Intelligence Biomedical Science Taiyuan030024 China

Gallium nitride (GaN) has some challenges for gas sensing, such as high detection lower limit (LOD) or controlling the epitaxy of nanostructures. To address these issues, we exclusively designed a device to enhance the gas interaction capabilities of GaN quantum dots (QDs) film fabricated by metal-organic chemical vapor deposition (MOCVD). The GaN QDs film gas sensor exhibited a low LOD (5 ppb) to NO2 at room temperature (RT), which has much superior gas performance than other GaN-based sensors. The results manifest that many ultra-small QDs around 2 nm in diameter are stacked to form QDs of larger size, and confirm the existence of vacancies. The sensor displays a ultra-high electron mobility of 1237.37 cm2 V−1s−1, demonstrate that great shallow donor impurities in GaN QDs film that ionize easily at RT, which is greatly beneficial for gas sensing. The sensing mechanisms were analyzed based on its abundant active sites, ultrahigh carrier mobility, high surface energy and chemical activity, grain boundary barrier and good electrical conductivity. Moreover, the sensor processes high selectivity, repeatability, stability and reusability based on MOCVD technology which can realize precise control of structure, morphology and surface energy level, which is expected to achieve rapid industrialization. © 2022, The Authors. All rights reserved.

关键词： Gallium nitride

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High-Order Continuous-Variable Coherence of Phase-Dependent Squeezed State

arXiv

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arXiv 2021年

作者： Guo, Yanqiang Zhang, Haojie Guo, Xiaomin Zhang, Yuchi Zhang, Tiancai Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education College of Physics and Optoelectronics Taiyuan University of Technology Taiyuan030024 China State Key Laboratory of Cryptology Beijing100878 China State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Opto-Electronics Shanxi University Taiyuan030006 China

We study continuous variable coherence of phase-dependent squeezed state based on an extended Hanbury Brown-Twiss scheme. High-order coherence is continuously varied by adjusting squeezing parameter r, displacement α, and squeezing phase θ. We also analyze effects of background noise γ and detection efficiency η on the measurements. As the squeezing phase shifts from 0 to π, the photon statistics of the squeezed state continuously change from the anti-bunching (g(n) (n) > n!) which shows a transition from particle nature to wave nature. The experiment feasibility is also examined. It provides a practical method to generate phase-dependent squeezed states with high-order continuous-variable coherence by tuning squeezing phase θ. The controllable coherence source can be applied to sensitivity improvement in gravitational wave detection and quantum imaging. Copyright © 2021, The Authors. All rights reserved.

关键词： Quantum optics

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10-Hertz quantum light source generation on the cesium D2 line using single photon modulation

arXiv

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arXiv 2022年

作者： Zuo, Guan-Hua Zhang, Yu-Chi Li, Gang Zhang, Peng-Fei Yang, Peng-Fei Guo, Yan-Qiang Zhu, Shi-Yao Zhang, Tian-Cai State Key Laboratory of Quantum Optics and Quantum Optics Devices Collaborative Innovation Center of Extreme Optics Institute of Opto-Electronics Shanxi University Taiyuan030006 China College of Physics and Electronic Engineering Shanxi University Taiyuan030006 China Department of Physics Zhejiang University Hangzhou310027 China Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi Province College of Physics and Optoelectronics Taiyuan University of Technology Taiyuan030024 China

Generation of quantum light source is a promising technique to overcome the standard quantum limit in precision measurement. Here, we demonstrate an experimental generation of quadrature squeezing resonating on the cesium D2 line down to 10 Hz for the first time. The maximum squeezing in audio frequency band is 5.57 dB. Moreover, we have presented a single-photon modulation locking to control the squeezing angle, while effectively suppressing the influence of laser noise on low-frequency squeezing. The whole system operates steadily for hours. The generated low-frequency quantum light source can be applied in quantum metrology, light-matter interaction investigation and quantum memory in the audio frequency band and even below. Copyright © 2022, The Authors. All rights reserved.

关键词： Photons

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Arbitrarily shaped retro-reflector by optics surface transformation

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Chinese Optics Letters 2020年第10期18卷 58-62页

作者： Fei Sun Yichao Liu Yibiao Yang Zhihui Chen Sailing He Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi ProvinceCollege of Physics and OptoelectronicsTaiyuan University of TechnologyTaiyuan 030024China Centre for Optical and Electromagnetic Research State Key Laboratory of Modern Optical InstrumentationNational Engineering Research Center for Optical InstrumentsZhejiang UniversityHangzhou 310058China

A novel way to design arbitrarily shaped retro-reflectors by optics surface transformation is proposed. The entire design process consists of filling an optic-null medium between the input and output surfaces of the retroreflector, on which the points have 180 deg reverse corresponding relations. The retro-reflector can be designed to be very thin(a planar structure) with high efficiency. The effective working angles of our retro-reflector are very large(from-80 deg to +80 deg), which can, in principle, be further extended. Layered metal plates and zero refractive index materials are designed to realize the proposed retro-reflector for a TM polarized beam.

关键词： retro-reflector optics surface transformation

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Machine-learning-enabled vectorial opto-magnetization orientation

arXiv

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arXiv 2021年

作者： Yan, Weichao Nie, Zhongquan Zeng, Xunwen Dai, Guohong Cai, Mengqiang Shen, Yun Deng, Xiaohua Institute of Space Science and Technology Nanchang University Nanchang330031 China Key Lab of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi Province College of Physics and Optoelectronics Taiyuan University of Technology Taiyuan030024 China Department of Physics School of Science Nanchang University Nanchang330031 China Information Engineering School Nanchang University Nanchang330031 China

Manipulation of light-induced magnetization has become a fundamentally hot topic with a potentially high impact for atom trapping, confocal and magnetic resonance microscopy, and data storage. The control of the magnetization orientation mainly relies on the direct methods composed of amplitude, phase and polarization modulations of the incident light under the tight focusing condition, leaving the achievement of arbitrary desirable three-dimensional (3D) magnetization orientation complicated, inflexible and inefficient. Here, we propose a facile approach called machine learning inverse design to achieve expected vectorial opto-magnetization orientation. This pathway is time-efficient and accurate to produce the demanded incident beam for arbitrary prescribed 3D magnetization orientation. It is highlighted that the machine learning method is not only applied for magnetization orientations, but also widely used in the control of magnetization structures. © 2021, CC BY.

关键词： Polarization

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Antitumor Effects of Cds-Ppix Adducts for Nuclear-Targeted Sonodynamic Therapy

SSRN

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SSRN 2023年

作者： Xue, Juanjuan Jia, Muyue Sang, Shengbo Li, Huaqian Wang, Xiaojuan Guo, Li Duan, Qianqian Xi, Yanfeng Shanxi Key Laboratory of Micro Nano Sensors & Artificial Intelligence Perception College of Information and Computer Taiyuan University of Technology Taiyuan030024 China Key Lab of Advanced Transducers and Intelligent Control System Ministry of Education Taiyuan University of Technology Taiyuan030024 China Shanxi Research Institute of 6D Artificial Intelligence Biomedical Science Taiyuan030024 China Department of Pathology Shanxi Cancer Hospital Shanxi Hospital Affiliated to CancerHospital Chinese Academy of Medical Sciences Cancer Hospital Affiliated to Shanxi Medical University Shanxi Taiyuan030013 China Shanxi Key Laboratory of Bone and Soft Tissue Injury Repair Department of Orthopaedics Second Hospital of Shanxi Medical University Taiyuan030001 China Department of Pathology Shanxi Tumor Hospital Taiyuan030013 China

To achieve high-efficiency treatment to diseases, accurate delivery of drugs with a carrier into the specific organelles is of great importance. The nucleus is the ultimate target for a large number of drugs and direct delivery of drugs into nucleus can greatly improve the therapeutic treatment. Whereas, in sonodynamic therapy (SDT), the fact that most drug delivery systems can only deliver drugs to the cytoplasm of the cells and cannot act directly on the nucleus. In this paper, nucleolus-targeted carbondots (CDs) are prepared. Also, the conjugate of CDs and PpIX is synthesized by amide cross-linking and then release singlet oxygen to kill cancer cells under ultrasound radiation. The resulting CDs-PpIX nanoparticles showed significant nuclear targeting properties, and greatly improved the efficiency of acoustic dynamics treatment, as the nucleus exhibited poor tolerance to reactive oxygen species (ROS) generated during acoustic dynamics treatment. In addition, ROS as an extracellular signal can activate the p38MAPK protein pathway, which is the main mechanism of ultrasound killing of cancer cells. Our results demonstrate the great potential of CDs-PpIX in targeting cell nuclei for acoustic dynamics treatment. © 2023, The Authors. All rights reserved.

关键词： Cancer cells

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controllable optical bistability in a three-mode optomechanical system with a membrane resonator

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Chinese Physics B 2018年第7期27卷 382-387页

作者： Jiakai Yan Xiaofei Zhu Bin Chen Department of Physics College of Physics and OptoelectronicsTaiyuan University of TechnologyTaiyuan 030024Chin Key Lab of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi ProvinceTaiyuan 030024China

We study the optical bistability （OB） in a three-mode cavity optomechanical system, where an oscillating membrane of perfect reflection is inserted between two fixed mirrors of partial transmission. By investigating the behavior of steady state solutions, we find that the left and right cavities will exhibit the bistable behavior simultaneously in this optomechanical system by adjusting the left and right coupling fields. In addition, one can control the OB threshold and the width of the OB curve via adjusting the coupling strength, the detuning, and the decay rate. Moreover, we further illustrate the OB appearing in the cavity by the effective potential as a function of the position.

关键词： optical bistability oscillating membrane optomechanical system

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Performance improvement in double-ended RDTS by suppressing the local external physics perturbation and intermodal dispersion

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Chinese Optics Letters 2019年第7期17卷 17-22页

作者： Jian Li Yang Xu Mingjiang Zhang Jianzhong Zhang Lijun Qiao Tao Wangh Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi ProvinceTaiyuan 030024China College of Physics&Optoelectronics Taiyuan University of TechnologyTaiyuan 030024China

We propose and experimentally demonstrate a novel Raman-based distributed fiber-optics temperature sensor(RDTS) for improving the temperature measurement accuracy and engineering applicability. The proposed method is based on double-ended demodulation with a reference temperature and dynamic dispersion difference compensation method, which can suppress the effect of local external physics perturbation and intermodal dispersion on temperature demodulation results. Moreover, the system can omit the pre-calibration process by using the reference temperature before the temperature measurement. The experimental results of dispersion compensation indicate that the temperature accuracy optimizes from 5.6°C to 1.2°C, and the temperature uncertainty decreases from 16.8°C to 2.4°C. Moreover, the double-ended configuration can automatically compensate the local external physics perturbation of the sensing fiber, which exhibits a distinctive improvement.

关键词： Performance improvement double-ended RDTS intermodal dispersion

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Point cloud reconstruction and volume measurement method for dynamic bulk material flow

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Measurement 2025年 254卷

作者： Chengcheng Hou Yongfei Kang Wei Qiao Huijie Dong Tiezhu Qiao College of Physics and Optoelectronics Engineering Taiyuan University of Technology Taiyuan 030024 China Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education Taiyuan University of Technology Taiyuan 030024 China China Energy Baotou Energy Co. Ltd. Baotou 014000 China College of Mechanical and Vehicle Engineering Taiyuan University of Technology Taiyuan 030024 China

Accurate volume measurement of bulk material flow on belt conveyors is a key technology and prerequisite for energy-saving control and safe operation of transportation systems. This paper presents a novel method for dynamic volume measurement of bulk material flow based on point cloud reconstruction. The proposed method comprises three main components: bulk material flow area segmentation using an enhanced PointNet++ network with multi-scale feature extraction capabilities, three-dimensional reconstruction using the α-shape algorithm to construct complete enclosed point cloud spaces, and volume calculation based on Delaunay triangulation. Experimental validation on a laboratory-scale platform demonstrated that our method maintains robust performance across varying bulk material volumes and running speeds, with an average volume measurement accuracy exceeding 97 %. The method shows particular effectiveness in industrial transportation scenarios with non-uniform loading and variable speeds.

关键词：

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LGBM-improved-MLSE equalizer for 50Gb/s PAM4 IM-DD PON with 10G class optical transceivers

LGBM-improved-MLSE equalizer for 50Gb/s PAM4 IM-DD PON with ...

引用

Asia Communications and Photonics Conference and Exhibition (ACP)

作者： Qianwu Zhang Yuntong Jiang Shuaihang Duan Zicong Wang Pu Li Bingyao Cao Yating Wu Key Laboratory of Specialty Optics and Optical Access Networks Shanghai Institute for Advanced Communication and Data Science Shanghai University Taiyuan China Key Laboratory of Advanced Transducers and Intelligent Control System Taiyuan University of Technology Ministry of Education Taiyuan China

A light gradient boosting machine improved-MLSE equalizer for 50Gb/s PAM4 IM-DD PON with 10G class optical transceivers is proposed and experimental results show that 21 dB power budget is achieved over 15km SSMF. ... 详细信息

ISBN: (数字)9781943580828

ISBN: (纸本)9781728176567

关键词： Maximum likelihood estimation Equalizers Boosting Transceivers Optical fiber communication Passive optical networks Photonics

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