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The 2023 International Conference on Display technology, (ICDT 2023)

作者： Liu, Xianzhe Chen, Ao Li, Yingxin Chen, Youbin Zhang, Tingting Wu, Jiacong Qiu, Tian Ning, Honglong Yao, Rihui Luo, Jianyi Research Center of Flexible Sensing Materials and Devices School of Applied Physics Wuyi University Jiangmen529020 China Department of Intelligent Manufacturing Wuyi University Jiangmen529020 China Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou510640 China

Wearable electronics represented by flexible displays and flexible sensors have been attracting enormous attention due to portability, miniaturization and low power consumption. Due to the dramatic increase in the number of display and sensing units, the power consumption and accuracy of the devices are facing great challenges. Active-matrix thin-film transistor (TFT) backplanes can effectively reduce signal crosstalk and power consumption of wearable electronics. For TFT devices, the gate insulation layer is one of key factors affecting the device performance such as device mobility, operating voltage, and bias stability, etc. High quality of solution-processed oxide dielectric films usually are obtained at a high temperature (>400 ℃), being a challenge for compatibility with flexible plastic substrates. In this work, low-temperature annealing processes (the electric oven (EO) and deep ultraviolet (DUV) processing) of high-k zirconia dielectric films was investigated. Compared to the thermal annealing process, the EO or DUV processing-annealing process could obtain an approximate dielectric properties with that of thermal annealing process. The EO and DUV processing could effectively promoted the MO framework and the elimination of oxygen defects in the spin-coating films. DUV processing ZrO2 film annealed at 150 ℃ exhibited an excellent properties including a large capacitance of 220 nF/cm2 and low leakage current of ~10−7 A/cm2. These data suggest that combining low-temperature annealing with EO and DUV irradiation holds great promise for the rapid, low-temperature production of high-quality and flexible oxide electronic devices. © 2023, John Wiley and Sons Inc. All rights reserved.

关键词： Thin film transistors

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Robust ESPI fringe pattern denoising method using the Restormer Partial Differential Network (Res-PDNet)

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Journal of the Optical Society of America A 2025年第7期42卷 978-988页

作者： Wen Wang Pengyan Ren Zhitao Xiao Mingyue Zhu Yu Miao Fang Zhang School of Life Sciences Tiangong University Tianjin 300387 China Tianjin Key Laboratory of Optoelectronic Detection Technology and System Tianjin 300387 China School of Electronic and Information Engineering Tiangong University Tianjin 300387 China

Electronic speckle pattern interferometry (ESPI) is an important non-destructive testing technique. Denoising the interference fringe pattern is the key link of this technique as well as a hot spot of current research. In this work, we introduce the Restormer Partial Differential Network (Res-PDNet) for ESPI fringe denoising. The method uses PDNet as the base network, which combines the partial differential equation denoising idea and deep learning model, and optimizes the network according to the characteristics of the fringe patterns. In order to balance fringe denoising and structure preservation, our approach incorporates two key enhancements. First, Multi-Dconv Head Transposed Attention and Gated-Dconv Feed-Forward Network modules of Restormer are added after the residual blocks of PDNet, which allows the network to capture more information about the fringe structure and texture. Second, orientation constraints of the fringe pattern are introduced in the loss function to further protect the fringe shape. The Res-PDNet network can accurately recognize the fringe structure and maintain the fringe shape while filtering out noise. It has a good denoising effect on the electron scattering interference fringe pattern.

关键词： Composite materials Deep learning Fourier transforms Neural networks Speckle patterns Wavelet transforms

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Force Feedback Glove Design for Virtual Reality Applications

Force Feedback Glove Design for Virtual Reality Applications

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IEEE Eurasia Conference on IOT, Communication and Engineering (ECICE)

作者： Yiming Chen Hesen Dai Mingkun Wang Dong Sun School of Optoelectronic and Communication Engineering Xiamen University of Technology Xiamen China Fujian Key Laboratory of Optoelectronic Technology and Devices Xiamen University of Technology Xiamen China

Immersion is the most important feature of virtual reality (VR) interaction. To achieve an immersive experience in a virtual environment, visual-auditory information reception and haptic interactive feedback are required. As the demand for human-computer interaction continues to increase, natural gesture interaction and haptic feedback become increasingly important. To improve the immersive experience of virtual environments, we proposed force-tactile feedback and hand posture acquisition for measurement design. A simple structured, lightweight posture acquisition and force-tactile feedback device were designed in this study. The device consisted of five potentiometers on the fingers and five servos on the back of the hand plus a central processor connected to a computer device. The device was easily integrated with existing VR positioners. To evaluate the feasibility and usability of the interactive device, we performed common operations in the virtual experimental scenario, including hand pose replication, grasping cubes and spheres, and picking up and releasing bows and arrows. The results showed that force feedback improved the user’s experience during grasping in the virtual experimental scenario. All operations took significantly less time to complete and the user interaction was more accurate.

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Design of high-reflectivity dynamic switchable metasurface holography

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Optical and Quantum Electronics 2024年第10期56卷 1-13页

作者： Yang, Zehao Wang, Yunfei Zhu, Qiaofen Xi, Sixing Zhang, Lei Hu, Dan Zhang, Yan School of Mathematics and Physics Science and Engineering Hebei Computational Optical Imaging and Photoelectric Detection Technology Innovation Center Hebei International Joint Research Center for Computational Optical Imaging and Intelligent Sensing Hebei University of Engineering Handan056038 China School of Mechanical and Electrical Engineering Chuzhou University Chuzhou239000 China Department of Physics Beijing Key Laboratory of Metamaterials and Devices Key Laboratory of Terahertz Optoelectronics Beijing Advanced Innovation Center for Imaging Theory and Technology Capital Normal University Ministry of Education Beijing100048 China

In the field of holographic imaging, high-reflectivity metasurfaces have become a crucial technology for achieving high efficiency and high-resolution image reconstruction. This study utilizes the dynamic tunability of magnesium (Mg) to numerically design an optical metasurface capable of displaying multiple holographic images in different states, achieving a reflectivity of up to 82%. In its normal state, the metasurface uses the resonance phase modulation of the metallic Mg structure to display images. Upon the introduction of hydrogen, the Mg transitions to its dielectric state, and a separate gold (Au) structure is used to modulate and display different images. The core contribution of this research lies in the application of a high-reflectivity metal layer, which enhances the imaging effects post-magnesium switching and improves the quality of image display. This work provides a new solution for dynamic optical displays and information storage technologies, thereby expanding the application scope of optical metasurfaces. © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2024.

关键词： Holographic displays

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High-efficiency ultra-thin Cu_(2)ZnSnS_(4) solar cells by double-pressure sputtering with spark plasma sintered quaternary target

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Journal of Energy Chemistry 2021年第10期30卷 186-194,I0006页

作者： Ping Fan Zhigao Xie Guangxing Liang Muhammad Ishaq Shuo Chen Zhuanghao Zheng Chang Yan Jialiang Huang Xiaojing Hao Yi Zhang Zhenghua Su Shenzhen Key Laboratory of Advanced Thin Films and Applications College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060GuangdongChina School of Photovoltaic and Renewable Energy Engineering UNSWSydneyNSW 2052Australia Institute of Photoelectronic Thin Film Devices and Technology and Tianjin Key Laboratory of Thin Film Devices and Technology Nankai UniversityTianjin 300350China

In recent years,Cu_(2)ZnSnS_(4)(CZTS)semiconductor materials have received intensive attention in the field of thin-film solar cells owing to its non-toxic and low-cost *** this work,double-pressure sputtering technology is applied to obtain highly efficient and ultra-thin(-450 nm)pure Cu_(2)ZnSnS_(4)(CZTS)solar *** mixed materials with sulfides and copper powder as a quaternary target via spark plasma sintering(SPS)method and adopting double-layer sputtering(high+low pressure),a highly adhesive and large-grained CZTS thin film is *** a result,the damage to the surface of Mo contact is decreased so that the reflectivity of incident light can be ***,the composition of CZTS film was more uniform and the secondary phase separation at the Mo interface was ***,the interface defect state and deep level defect density in corresponding device with double-pressure is reduced and the ratio of depletion thickness to absorption layer thickness can reached to 0.58,which promoted the collection of photogenerated ***,an efficiency of 9.3%for ultra-thin(~450 nm)CZTS film solar cell is obtained.

关键词： CZTS Ultra-thin Solar cell SPS Sputtering

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Terahertz dual-beam leaky-wave antenna based on composite spoof surface plasmon waveguide

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optoelectronics Letters 2023年第2期19卷 72-76页

作者： BAI Yukun LI Sen Tianjin Key Laboratory of Film Electronic and Communication Devices Engineering Research Center of Optoelectronic Devices and Communication TechnologyMinistry of EducationSchool of Integrated Circuit Science and EngineeringTianjin University of TechnologyTianjin 300384China

In this paper, we propose a single-port dual-beam leaky-wave antenna(LWA) in the terahertz(THz) band based on a composite spoof surface plasmon polariton(SSPP) waveguide. The antenna can generate three independent transmission channels by exciting two independent modes inherent to hole and groove structures, respectively. By periodic modulation of the hole and groove structures, we achieve dual-beam scanning through a broad radiation angle using only the -1st space harmonics of the two modes, hence avoiding the instability of the -2rd space harmonic. Within the operating frequency range of 0.62—0.85 THz, the gain ranges from 13.5 d Bi to 17 d Bi for the backward beam, and from 6 d Bi to 11.8 d Bi for the forward beam. The antenna can accomplish continuous backward beam through broadside to forward beam scanning with a total scanning range of 116° and an average efficiency of about 92%. The antenna exhibits a great potential in the design of multi-transceiver radar system in the THz band and multi-beam LWAs.

关键词： Terahertz dual-beam leaky-wave antenna plasmon waveguide

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Simulation Design of a Low Noise Amplifier with 2.5 GHz Operating Frequency 1

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11th International Conference on Communications, Signal Processing, and Systems, CSPS 2022

作者： Wang, Hai Sun, Guiling Wang, Zhihong Zhang, Yi Jiang, Xiaomei Zhang, Ying Teaching Center for Experimental Electronic Information College of Electronic Information and Optical Engineering Nankai University Tianjin300350 China Department of Electronic Information Science and Technology College of Electronic Information and Optical Engineering Nankai University Tianjin300350 China Institute of Photoelectronic Thin Film Devices and Technology and Tianjin Key Laboratory of Thin Film Devices and Technology Nankai University Tianjin300350 China Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology Tianjin300071 China

ISBN: (数字)9789819926534

ISBN: (纸本)9789819926527

Nowadays the wireless communication infrastructure industry is facing with a number of great challenges, such as providing better signal quality and wider coverage in a crowded spectrum. Low noise amplifier (LNA), a significant component of communication system, plays an important role in modern wireless communication, radar, electronic countermeasure system between countries and so on. The sensitivity performance of the base station receiver can be dramatically improved by a suitable amplifier, especially the first stage LNA. In this paper, a low noise amplifier with an operating frequency of 2.5 GHz is designed with the help of the simulation software. The minimum values of input return loss S11 and output return loss S22 are −19.232 dB and −29.422 dB respectively. The maximum gain is 14.567 dB at the center frequency. Besides, the stability coefficient K is greater than 1 and the noise figure (NF) is 0.662 dB. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Low noise amplifiers

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Intermodal interference based refractive index sensor employing elliptical core photonic crystal fiber

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optoelectronics Letters 2021年第5期17卷 271-275页

作者： WU Xu-jie SONG Bin-bin WU Ji-xuan HUANG Wei The Key Laboratory of Computer Vision and System of Ministry of Education Tianjin Key Laboratory of Intelligence Computing and Novel Software TechnologyTianjin University of TechnologyTianjin 300384China Tianjin Key Laboratory of Optoelectronic Detection Technology and Systems College of Electronic and Information EngineeringTiangong UniversityTianjin 300387China

A refractive index(RI)sensor based on elliptical core photonic crystal fiber(EC-PCF)has been *** asymmetric elliptical core introduces the polarization-dependent characteristics of the fiber core *** performances of intermodal interference between the intrinsic polarization fiber core modes are investigated by contrast in two interferometers based on the Mach-Zehnder(M-Z)and Sagnac interference *** addition,the RI sensing characteristics of the two interferometers are studied by successively filling the three layers air holes closest to the elliptical core in the *** results show that the M-Z interference between LP_(01)and LP_(11)mode in the same polarized direction is featured with the incremental RI sensing sensitivity as the decreasing interference length,and the infilled scope around the elliptical core has a weak correlation with the RI sensing *** to the high birefringence of LP11 mode,the Sagnac interferometer has better RI sensing performance,the maximum RI sensing sensitivity of 12000 nm/RIU is achieved under the innermost one layer air holes infilled with RI matching liquid of RI=1.39 at the pre-setting EC-PCF length of 12 cm,which is two orders of magnitude higher than the M-Z interferometer with the same fiber *** series of theoretical optimized analysis would provide guidance for the applications in the field of biochemical sensing.

关键词： Sagnac PCF Intermodal interference based refractive index sensor employing elliptical core photonic crystal fiber

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Excitons in confined molecular aggregates

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Information ＆ Functional Materials 2024年第1期1卷 68-86页

作者： Xiaozhen Chen Jiadong Zhou Zengqi Xie Yuguang Ma State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and DevicesGuangdong Basic Research Center of Excellence for Energy&Information Polymer MaterialsSouth China University of TechnologyGuangzhouChina

Organic optoelectronic materials have attracted extensive attention in the past decades due to their wide applications in organic light‐emitting diodes(OLEDs),organic photovoltaics(OPVs),photocatalysis,*** ad-vancements have been obtained in the material designs based on the insight into the fundamental physics of exciton related to molecular stacking patterns in solid/condensed *** exciton characteristics and behaviors are not only a starting point for studying photophysical and photochemical processes on a microscopic level,but also a crucial point in determining the optoelec-tronic properties of macroscopic *** review summarizes the historic development of exciton models,accompanied by the discoveries of special molecular stacking patterns(H‐/J‐/X‐/M‐aggregates),and the competitive de‐excitation pathways of excitons including fluorescence,energy transfer,singlet fission,excimer formation and symmetry‐breaking charge separation in the confined aggregate ***,it highlights the capabilities of a correlation between molecular stacking modes and exciton behaviors,which provides new insights and perspectives for optimizing exciton character and behavior through the modulation of molecular arrangement in aggregate states,thereby enhancing the performance of optoelectronic materials.

关键词： aggregate mode energy transfer exciton model fluorescence organic optoelectronic material

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Probing phase transition of band topology via radiation topology

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Photonics Research 2024年第6期12卷 1150-1157页

作者： CHANG-YIN JI WENZE LAN PENG FU GANG WANG CHANGZHI GU YELIANG WANG JIAFANG LI YUGUI YAO BAOLI LIU Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement(MOE) Beijing Key Laboratory of Nanophotonics&Ultrafine Optoelectronic Systemsand School of PhysicsBeijing Institute of TechnologyBeijing 100081China School of Integrated Circuits and Electronics MIIT Key Laboratory for Low-Dimensional Quantum Structure and DevicesBeijing Institute of TechnologyBeijing 100081China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences CAS Key Laboratory of Vacuum PhysicsUniversity of Chinese Academy of SciencesBeijing 100190China CAS Center for Excellence in Topological Quantum Computation CAS Key Laboratory of Vacuum PhysicsUniversity of Chinese Academy of SciencesBeijing 100190China

Topological photonics has received extensive attention from researchers because it provides brand new physical principles to manipulate *** topology is characterized using the Berry phase defined by Bloch *** now,the scheme for experimentally probing the topological phase transition of band topology has always been relatively lacking in topological ***,radiation topology can be aroused by the far-field polarization singularities of Bloch states,which is described by the Stokes *** such two types of topologies are both related to Bloch states on the band structures,it is rather surprising that their development is almost ***,in optical analogs of the quantum spin Hall effects(QSHEs)and Su-Schrieffer-Heeger model,we reveal the correlation between the phase transition of band topology and radiation topology and then demonstrate that the radiation topology can be employed to study the band topological *** experimentally demonstrate such an intriguing phenomenon in optical analogs of *** findings not only provide an insightful understanding of band topology and radiation topology,but also can serve as a route to manipulate light.

关键词： transition topology topological

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