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2025 IEEE Silicon Photonics Conference, SiPhotonics 2025

作者： Li, Qiyuan Yi, Qiyuan Pan, An Shang, Chenglin Cui, Jinlai Zhu, Yupeng Zheng, Jun Xing, Sizhe Zhang, Junwen Chi, Nan Zeng, Cheng Xia, Jinsong Shen, Li Huazhong University of Science and Technology Wuhan National Laboratory for Optoelectronics School of Optical and Electronic Information Wuhan430074 China Institute of Semiconductors Chinese Academy of Sciences Key Laboratory of Optoelectronic Materials and Devices Beijing100083 China Fudan University Key Laboratory for Information Science of Electromagnetic Waves Department of Communication Science and Engineering Shanghai200433 China

ISBN: (纸本)9798331506186

We demonstrate a broadband integrated Mach-Zehnder modulator with a record 800-nm operation bandwidth in the shortwave infrared. The measured 3-dB electro-optic bandwidth of the modulator exceeds 67/67/48 GHz for the O-/C-/2-μm bands, facilitating high-speed data transmission beyond 100 Gbaud/λ across all these wavebands. © 2025 IEEE.

关键词： Light modulation

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High spatial-resolution biological tissue imaging in the second near-infrared region via optical parametric amplification pumped by an ultrafast vortex pulse [Invited]

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Chinese Optics Letters 2022年第10期20卷 8-13页

作者： Xuanke Zeng Congying Wang Yi Cai Qinggang Lin Xiaowei Lu Jiahe Lin Xinming Yuan Wenhua Cao Yuexia Ai Shixiang Xu Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province Shenzhen Key Laboratory of Micro-Nano Photonic Information TechnologyCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China College of Electronics and Information Engineering Shenzhen UniversityShenzhen 518060China

Applying an ultrafast vortex laser as the pump,optical parametric amplification can be used for spiral phase-contrast imaging with high gain,wide spatial bandwidth,and high imaging *** experiments show that this design has realized the 1064 nm spiral phase-contrast idler imaging of biological tissues(frog egg cells and onion epidermis)with a spatial resolution at several microns level and a superior imaging contrast to both the traditional bright-or dark-field imaging under a weak illumination of 7 nW/cm^(2).This work provides a powerful way for biological tissue imaging in the second near-infrared region.

关键词： optical parametric amplification ultrafast vortex laser pulse spatial resolution phase-contrast imaging

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Three-Dimensional Moiré Crystal in Ultracold Atomic Gases

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Physical Review Letters 2024年第16期133卷 163401页

作者： Ce Wang Chao Gao Jing Zhang Hui Zhai Zhe-Yu Shi School of Physics Science and Engineering Department of Physics Key Laboratory of Optical Information Detection and Display Technology of Zhejiang State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Opto-Electronics Collaborative Innovation Center of Extreme Optics Hefei National Laboratory Hefei 230088 China Institute for Advanced Study State Key Laboratory of Precision Spectroscopy

The work intends to extend the moiré physics to three dimensions. Three-dimensional moiré patterns can be realized in ultracold atomic gases by coupling two spin states in spin-dependent optical lattices with a relative twist, a structure currently unachievable in solid-state materials. We give the commensurate conditions under which the three-dimensional moiré pattern features a periodic structure termed a three-dimensional moiré crystal. We emphasize a key distinction of three-dimensional moiré physics: In three dimensions, the twist operation generically does not commute with the rotational symmetry of the original lattice, unlike in two dimensions, where these two always commute. Consequently, the moiré crystal can exhibit a crystalline structure that differs from the original underlying lattice. We demonstrate that twisting a simple cubic lattice can generate various crystal structures. This capability of altering crystal structures by twisting offers a broad range of tunability for three-dimensional band structures.

关键词： Cold gases in optical lattices

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Adaptive modulation attention-based face super-resolution reconstruction method

Adaptive modulation attention-based face super-resolution re...

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2022 International Workshop on Automation, Control, and Communication Engineering, IWACCE 2022

作者： Xie, Zhenglei Wang, Fengsui Wang, Yunlong Xu, Yue School of Electrical Engineering Anhui Polytechnic University Wuhu China Anhui Key Laboratory of Detection Technology and Energy Saving Devices Wuhu China Key Laboratory of Advanced Perception and Intelligent Control of High-end Equipment Ministry of Education Wuhu China

ISBN: (纸本)9781510660915

In view of the large deviation of the pixel value of the generated image caused by the abandonment of the BN layer by the previous deep face super-resolution module, and the inaccuracy of the face prior alignment module, an adaptive modulation super-resolution neural network combining the attention mechanism and face alignment is proposed. Firstly, in order to solve the problem of inaccurate face alignment, a specific attention module is used to extract features with low resolution, and the output feature map is aligned with the key point feature map to increase the accuracy of positioning landmarks. Secondly, aiming at the problem that local pixels have maximum values, an adaptive modulation super-division module is proposed to make the reconstructed image more suitable for visual senses. The experimental results show that compared with face super-resolution algorithms such as end-to-end learning facial prior network (FSRNET), facial landmark attention network (PFSR) and deep iterative collaboration network (DIC), better visual effects and performance indicators are achieved. © 2022 SPIE. All rights reserved.

关键词： Deep learning

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Harnessing electron spins with carbon materials for quantum information applications

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National Science Open 2023年第1期2卷 1-4页

作者： Hu Chen Ye-Xin Wang Shanshan Wang Weiguo Mao Song Gao Shang-Da Jiang Shen Zhou Institute for Quantum Science and Technology College of ScienceScience and Technology on Advanced Ceramic Fibers and Composites LaboratoryNational University of Defense TechnologyChangsha 410073China College of Materials Science and Engineering Changsha University of Science and TechnologyChangsha 410114China Spin-X Institute School of Chemistry and Chemical EngineeringState Key Laboratory of Luminescent Materials and DevicesGuangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional MaterialsSouth China University of TechnologyGuangzhou 510641China Beijing National Laboratory of Molecular Science Beijing Key Laboratory of Magnetoelectric Materials and DevicesCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China

The implementation of information technology relies on functional chemicals and *** have led to the rise of the electronic information *** the next generation of information technology,how to implement quantum information processing has become an urgent task[1].In order to carry superposition state and entanglement,systems,which are better isolated from environment,are designed to boost the quantum coherence *** example,superconducting circuits,which are the leading candidate of quantum processor,uses the transmon design and the mK temperature condition to reduce the influence of environmental noise.

关键词： materials. quantum superposition

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10-4: Design and Analysis of Ln-IZO TFTs For Electrophoretic Display Driving

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SID Symposium Digest of Technical Papers 2024年第S1期55卷 98-101页

作者： Lei Zhou Miao Xu Wei-Jing Wu Jun-Biao Peng State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou China Guangzhou New Vision Optoelectronic Co. Ltd. Guangzhou China

In this paper, we presented an Electrophoretic display(EPD) based on high mobility Ln-IZO thin film transistor (TFT) panel. The display panel has a 104 *212 pixel array with a diagonal size of 2.13inch. We discuss the relationship between charge rate versus TFT mobility, clock feed-though effect versus TFT parasitic capacitance, charge retention versus leakage current. Ln-IZO TFTs have advantages in EPD displays in terms of high mobility, low parasitic capacitance and low leakage current.

关键词： EPD TFT mobility parasitic capacitance leakage current

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Boosting efficiency and stability of 2D alternating cation perovskite solar cells via rational surface-modification: Marked passivation efficacy of anion

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Journal of Energy Chemistry 2023年第9期84卷 354-362页

作者： Hualin Zheng Xuefeng Peng Tingxi Chen Ting Zhang Shihao Yuan Lei Wang Feng Qian Jiang Huang Xiaodong Liu Zhi David Chen Yanning Zhang Shibin Li State Key Laboratory of Electronic Thin Films and Integrated Devices and School of Optoelectronic Science and EngineeringUniversity of Electronic Science and Technology of China(UESTC)Chengdu 610054SichuanChina Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China(UESTC)Chengdu 610054SichuanChina Department of Electrical&Computer Engineering and Center for Nanoscale Science&EngineeringUniversity of KentuckyLexingtonKY 40506USA Institute of Electronic and Information Engineering of UESTC in Guangdong Dongguan 523808GuangdongChina

Two-dimensional(2D) alternating cation(ACI) perovskite surface defects,especially dominant iodine vacancies(V_Ⅰ) and undercoordinated Pb^(2+),limit the performance of perovskite solar cells(PVSCs).To address the issue,1-butyl-3-methylimidazolium trifluoro-methane-sulfonate(BMIMOTF) and its iodide counterpart(BMIMI) are utilized to modify the perovskite surface *** find that BMIMI can change the perovskite surface,whereas BMIMOTF shows a nondestructive and more effective defect passivation,giving significantly reduced defect density and suppressed charge-carrier nonradiative *** mainly attributes to the marked passivation efficacy of OTF-anion on V_Ⅰ and undercoordinated Pb^(2+),rather than BMIMI^(+) *** from the rational surface-modification of BMMIMOTF,the films exhibit an optimized energy level alignment,enhanced hydrophobicity and suppressed ion ***,the BMIMOTF-modified devices achieve an impressive efficiency of 21.38% with a record open-circuit voltage of 1.195 V,which is among the best efficiencies reported for 2D PVSCs,and display greatly enhanced humidity and thermal stability.

关键词： 2D ACI perovskite solar cells Charge-carrier nonradiative recombination Surface defects passivation Energy level alignment Ionic migration Stability

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Unsupervised person re-identification guided by refinement feature in multi-label distribution sorting learning

Unsupervised person re-identification guided by refinement f...

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2022 International Workshop on Automation, Control, and Communication Engineering, IWACCE 2022

作者： Qian, Yaping Wang, Fengsui Xiong, Lei Yan, Tao Xu, Yue School of Electrical Engineering Anhui Polytechnic University Wuhu China Anhui Key Laboratory of Detection Technology and Energy Saving Devices Wuhu China Key Laboratory of Advanced Perception and Intelligent Control of High-end Equipment Ministry of Education Wuhu China

ISBN: (纸本)9781510660915

Traditional person re-identification methods are mostly based on supervised state of manually annotated data sets. Although the recognition accuracy is high, the algorithm completely relies on effective annotation information and lacks practicability. Based on the above problems, an unsupervised person re-identification method is proposed, which refines features to guide multi-label distribution sorting learning. Firstly, a single and multi-label classification network structure is constructed to improve the matching accuracy of tags by learning the characteristics of each person and its k nearest neighbor and sharing the same class. Secondly, the refinement feature extraction module is designed and embedded into the original ResNet50 network, and the potential key areas in the person image are adaptively located. While weakening the appearance differences of the features, multi-information mining is carried out to obtain the refined features of the characters and assist the classification network to improve the performance. Thirdly, reliable multi-category labels are screened by punishing the sorting between positive and negative categories of labels in multi-category labels. Finally, the network is supervised by combining multi-label distribution sorting loss and multi-label classification loss. Experiments show that without any annotation information, the recognition accuracy of Market-1501 and DukeMTMC-reID datasets is 58.4% and 42.3%, respectively, and the mAP of Market-1501 dataset is increased by 12.9%. © 2022 SPIE. All rights reserved.

关键词： Sorting

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Interlayer sensitized van der Waals heterojunction photodetector with enhanced performance

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Nano Research 2023年第7期16卷 10537-10544页

作者： Huide Wang Yonghong Zeng FanXu Meng Rui Cao Yi Liu Zhinan Guo Tingting Wang Haiguo Hu Sidi Fan Yatao Yang SWageh Omar AAl-Hartomy Abul Kalam Yonghong Shao Yu-Jia Zeng Dianyuan Fan Han Zhang International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology Institute of Microscale OptoelectronicsInterdisciplinary Center of High Magnetic Field Physics of Shenzhen UniversityCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China Guangzhou Key Laboratory of Sensing Materials and Devices Center for Advanced Analytical ScienceSchool of Chemistry and Chemical EngineeringGuangzhou UniversityGuangzhou 510006China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China College of Electronics and Information Engineering Shenzhen UniversityShenzhen 518060China Center of Characterization and Analysis Jilin Institute of Chemical TechnologyJilin 132022China School of Mathematical&Physical Sciences Wuhan Textile UniversityWuhan 430200China Department of Physics Faculty of ScienceKing Abdulaziz UniversityJeddah 21589Saudi Arabia Research Center for Advanced Materials Science(RCAMS) King Khalid UniversityP.O.Box 9004Abha 61413Saudi Arabia Department of Chemistry College of ScienceKing Khalid UniversityP.O.Box 9004Abha 61413Saudi Arabia

Although photodetection based on two-dimensional(2D)van der Waals(vdWs)P-N heterojunction has attracted extensive attention recently,their low responsivity(R)due to the lack of carrier gain mechanism in reverse bias or zero bias operation hinders their applications in advanced photodetection ***,a black phosphorus/rhodamine 6G/molybdenum disulfide(BP/R6G/MoS_(2))photodiode with high responsivity at reverse bias or zero bias has been achieved by using interfacial charge transfer of R6G molecules assembled between heterojunction *** formed vdWs interface achieves high performance photoresponse by efficiently separating the additional photogenerated electrons and holes generated by R6G *** devices sensitized by the dye molecule R6G exhibit enhanced photodetection performance without sacrificing the photoresponse *** them,the R increased by 14.8-20.4 times,and the specific detectivity(D^(*))increased by 24.9-34.4 *** strategy based on interlayer assembly of dye molecules proposed here may pave a new way for realizing high-performance photodetection based on 2D vdWs heterojunctions with high responsivity and fast response speed.

关键词： heterojunction photodetector interlayer sensitization charge transfer responsivity

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Multifold Majorana corner modes arising from multiple pairs of helical edge states

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Physical Review B 2025年第8期111卷 085421-085421页

作者： Zhiwei Yin Haoshu Li Zhongbo Yan Shaolong Wan Department of Modern Physics University of Science and Technology of China Hefei 230026 China Department of Physics University of Science and Technology of China Hefei 230026 China Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices State Key Laboratory of Optoelectronic Materials and Technologies School of Physics Sun Yat-sen University Guangzhou 510275 China

Quantum spin Hall insulators with a pair of helical edge states and proximity-induced superconductivity have been shown to support second-order topological superconductors with Majorana corner modes. As the Majorana corner modes originate from the helical edge states of the quantum spin Hall insulators, the question of whether quantum spin Hall insulators with multiple pairs of helical edge states and proximity-induced superconductivity can give rise to second-order topological superconductors with multifold Majorana corner modes is an interesting one to address. In this work, we consider a quantum spin Hall insulator with two pairs of helical edge states. We find that robust twofold Majorana corner modes can be achieved when the helical edge states are gapped by a combined action of a magnetic exchange field and an s-wave pairing or an s+p mixed-parity pairing. The stability of two Majorana zero modes per corner under the action of magnetic exchange fields is attributed to the protection from the chiral symmetry. Our study reveals that heterostructures composed of superconductors and quantum spin Hall insulators with multiple pairs of helical edge states could serve as a platform to pursue multifold Majorana corner modes.

关键词： Shear waves

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