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Erasable Ferroelectric Domain Wall Diodes

Chinese Physics Letters 2021年第1期38卷 121-124页

作者： Wei Zhang Chao Wang Jian-Wei Lian Jun Jiang An-Quan Jiang State Key Laboratory of ASIC&System School of MicroelectronicsFudan UniversityShanghai 200433China

The unipolar diode-like domain wall currents in LiNbO3 single-crystal nanodevices are not only attractive in terms of their applications in nonvolatile ferroelectric domain wall memory,but also useful in half-wave and full-wave rectifier systems,as well as detector,power protection,and steady voltage *** traditional diodes,where the rectification functionality arises from the contact between n-type and p-type conductors,which are unchanged after off-line production,ferroelectric domain wall diodes can be reversibly created,erased,positioned,and shaped,using electric *** demonstrate such functionality using ferroelectric mesa-like cells,formed at the surface of an insulating X-cut LiNbO_(3) single *** the application of an in-plane electric field above a coercive field along the polar Z axis,the domain within the cell is reversed to be antiparallel to the unswitched bottom domain via the formation of a conducting domain *** wall current was rectified using two interfacial volatile domains in contact with two side Pt *** the nonvolatile inner domain wall,the interfacial domain walls disappear to turn off the wall current path after the removal of the applied electric field,or under a negative applied voltage,due to the built-in interfacial imprint *** novel devices have the potential to facilitate the random definition of diode-like elements in modern large-scale integrated circuits.

关键词： switched ferroelectric interfacial

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Recent Advances in Electrochemical-Based Silicon Production Technologies with Reduced Carbon Emission

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Research 2024年第1期2023卷 209-236页

作者： Feng Tian Zhongya Pang Shen Hu Xueqiang Zhang Fei Wang Wei Nie Xuewen Xia Guangshi Li Hsien-Yi Hsu Qian Xu Xingli Zou Li Ji Xionggang Lu State Key Laboratory of Advanced Special Steel&Shanghai Key Laboratory of Advanced Ferrometallurgy&School of Materials Science and Engineering Shanghai University99#Shangda RoadShanghai 200444China Center for Hydrogen Metallurgy Technology Shanghai UniversityShanghai 200444China State Key Laboratory of ASIC and System School of MicroelectronicsFudan University220#Handan RoadShanghai 200433China School of Energy and Environment Department of Materials Science and EngineeringCity University of Hong KongKowloon TongHong KongChina

Sustainable and low-carbon-emission silicon production is currently one of the main focuses for the metallurgical and materials science ***,considered a promising strategy,has been explored to produce silicon due to prominent advantages:(a)high electricity utilization efficiency;(b)low-cost silica as a raw material;and(c)tunable morphologies and structures,including films,nanowires,and *** review begins with a summary of early research on the extraction of silicon by *** has been placed on the electro-deoxidation and dissolution–electrodeposition of silica in chloride molten salts since the 21st century,including the basic reaction mechanisms,the fabrication of photoactive Si films for solar cells,the design and production of nanoSi and various silicon components for energy conversion,as well as storage ***,the feasibility of silicon electrodeposition in room-temperature ionic liquids and its unique opportunities are *** this basis,the challenges and future research directions for silicon electrochemical production strategies are proposed and discussed,which are essential to achieve large-scale sustainable production of silicon by electrochemistry.

关键词： directions electrodeposition electricity

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Giant infrared bulk photovoltaic effect in tellurene for broad-spectrum neuromodulation

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Light(Science & Applications) 2024年第11期13卷 2812-2823页

作者： Zhen Wang Chunhua Tan Meng Peng Yiye Yu Fang Zhong Peng Wang Ting He Yang Wang Zhenhan Zhang Runzhang Xie Fang Wang Shuijin He Peng Zhou Weida Hu State Key Laboratory of Infrared Physics Shanghai Institute of Technical PhysicsChinese Academy of SciencesShanghaiChina State Key Laboratory of ASIC and System Department of MicroelectronicsFudan UniversityShanghaiChina University of Chinese Academy of Sciences BeijingChina School of Life Science and Technology ShanghaiTech UniversityShanghaiChina School of Mathematical and Physical Sciences Wuhan Textile UniversityWuhanChina Shanghai Clinical Research and Trial Center ShanghaiChina

Given the surpassing of the Shockley-Quiesser efficiency limit in conventional p-n junction photovoltaic effect,bulk photovoltaic effect(BPVE)has garnered significant research ***,the BPVE primarily focuses on a narrow wavelength range,limiting its potential *** we report a giant infrared bulk photovoltaic effect in tellurene(Te)for broad-spectrum *** generated photocurrent in uniformly illuminated Te excludes other photoelectric effects and is attributed to the *** bulk photovoltaic wavelength in Te spans a wide range from the ultraviolet(390 nm)to the mid-infrared(3.8μm).Moreover,the photocurrent density of 70.4 A cm^(−2) under infrared light simulation outperforms that in previous ultraviolet and visible semiconductors as well as infrared *** attached to the dendrites or somata of the cortical neurons successfully elicit action potentials under broad-spectrum light *** work lays the foundation for the further development of infrared BPVE in narrow bandgap materials.

关键词： effect spectrum ultraviolet

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Monolithic Logic Units based on DCFL Structure on p-GaN platform for GaN ICs 15

Monolithic Logic Units based on DCFL Structure on p-GaN plat...

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15th IEEE International Conference on asic, asicON 2023

作者： Pan, Maolin Wang, Luyu Wang, Qiang Zhang, Penghao Wang, Yuhang Xu, Min Fudan University Shanghai State Key Laboratory of ASIC and System Shanghai Institute of Intelligent Electronics & Systems School of Microelectronics China

ISBN: (纸本)9798350312980

GaN-based digital integrated circuits (ICs) are constructed on the commercially available GaN-on-Si p-GaN platform. The functions of inverter, NAND, AND, NOR, and OR logic circuits are successfully realized based on direct-coupled field-effect transistor logic (DCFL) structure. Under a drive voltage of 5V and a load ratio of 20, the low output (VOL) can reach as low as 0.1V. Additionally, a functional-oriented driver is constructed. All the transient tests at frequencies up to 100 kHz exhibit excellent performance characteristics. © 2023 IEEE.

关键词： GaN-ICs Inverter NAND-AND NOR-OR p-GaN HEMT

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A high-speed 2D optoelectronic in-memory computing device with 6-bit storage and pattern recognition capabilities

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Nano Research 2022年第3期15卷 2472-2478页

作者： Jialin Meng Tianyu Wang Zhenyu He Qingxuan Li Hao Zhu Li Ji Lin Chen Qingqing Sun David Wei Zhang State Key Laboratory of ASIC and System School of MicroelectronicsFudan UniversityShanghai 200433China National Integrated Circuit Innovation Center No.825 Zhangheng RoadShanghai 201203China

The explosively developed era of big-data compels the increasing demand of nonvolatile memory with high efficiency and excellent storage ***,we fabricated a high-speed photoelectric multilevel memory device for neuromorphic *** novel two-dimensional(2D)MoSSe with a unique Janus structure was employed as the channel,and the stack of Al_(2)O_(3)/black phosphorus quantum dots(BPQDs)/Al_(2)O_(3)was adopted as the *** storage performance of the resulting memory could be verified by the endurance and retention tests,in which the device could remain stable states of programming and erasing even after 1,000 cycles and 1,000 *** multibit storage could be realized through both different voltage amplitudes and pulse numbers,which could achieve 6 bits(64 distinguishable levels)under pulse width of 50 ***,our memory device also could realize the simulations of synapses in human brain with optical and electric modulations synergistically,such as excitatory post-synaptic current(EPSC),long-term potentiation/depression(LTP/LTD),and spike-timing-dependent plasticity(STDP).Neuromorphic computing was successfully achieved through a high recognition of handwritten digits up to 92.5%after 103 *** research is a promising avenue for the future development of efficient memory and artificial neural network systems.

关键词： memory multibit two-dimensional(2D) MoSSe Co-modulation

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Feature-Based Hand Gesture Recognition Using Two-Antenna Doppler Radar system 9

Feature-Based Hand Gesture Recognition Using Two-Antenna Dop...

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9th IEEE MTT-S International Wireless Symposium, IWS 2022

作者： Wang, Pengcheng Liang, Tingxuan Xu, Hongtao Fudan University State Key Laboratory of Asic & System Department of Microelectronics Shanghai China

ISBN: (数字)9781665481977

ISBN: (纸本)9781665481977

In this paper, we studied the hand gesture recognition algorithm based on features extraction under the single-frequency continuous wave and two-receiving antenna structure in mm wave radar. Through the radar parameters design and signal processing, the time-frequency spectrum can be generated by single frequency continuous wave and the phase distribution spectrum can be generated by the two-receiving antenna structure. 12 artificial design features are extracted from the time-frequency spectrum and phase distribution spectrum after OS-CFAR de-noising method. The support vector machine (SVM) is used to recognize the seven defined gestures from extracted features, and the recognition rate can reach 93.84%. © 2022 IEEE.

关键词： Support vector machines

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PAIR: Periodically Alternate the Identity of Routers to Ensure Deadlock Freedom in NoC

PAIR: Periodically Alternate the Identity of Routers to Ensu...

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Asia and South Pacific Design Automation Conference

作者： Zifeng Zhao Xinghao Zhu Jiyuan Bai Gengsheng Chen State Key Laboratory of ASIC & System Fudan University China

Network-on-Chip (NoC) has become widely adopted in multi/many-core systems for on-chip communication. Avoiding deadlock is a critical issue in NoC design. Recently proposed techniques partition the network resources into one or more express paths. Each path allows a blocked packet to move forward to its destination, thereby breaking deadlocks. However, as the scaling up of NoC, the existing methods are experiencing a decline in efficiency due to the coarse-grained partitioning strategy. In this work, we present PAIR, a novel scheme that guarantees deadlock freedom. PAIR adopts a fine-grained resource partitioning approach, significantly increasing the number of express paths available. The express paths in PAIR not only allow blocked packets but also permit non-blocked packets to be forwarded to the next hop, minimizing the performance degradation for the normal flow control. We implemented and evaluated PAIR on the mesh network using classic synthetic traffic patterns. Our experiments show that PAIR significantly improves throughput performance, achieving an average increase of 80.36% compared with state-of-the-art deadlock-free solutions. Furthermore, PAIR outperforms the latest deadlock-free scheme by 37.78% in terms of throughput.

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Experimental demonstration of D-band signals wireless transmission over 30 km

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Science China(Technological Sciences) 2025年第2期68卷 318-320页

作者： Yi WEI Xiongwei YANG Jianjun YU Xianming ZHAO Mingxu WANG Jingwen TAN Weiping LI Feng ZHAO Chengzhen BIAN Hansong MA Qinyi ZHANG Qiutong ZHANG Bing Zhang Wen ZHOU Kaihui WANG Sicong XU Jianguo YU State Key Laboratory of ASIC and System Key Laboratory for Information Science of Electromagnetic Waves(MoE)and School of Information Science and TechnologyFudan UniversityShanghai 200433China Harbin Institute of Technology Harbin 150001China School of Automation Xi’an University of Posts and TelecommunicationsXi’an 710121China School of Electronic Engineering Beijing University of Posts and TelecommunicationsBeijing 100876China

Due to the rise of innovative technologies like artificial intelligence(AI),the Internet of Things(IoT),and telemedicine,the demand for internet traffic is rapidly *** order to achieve ultra-high-speed wireless communication,many researchers are directing their efforts towards the *** D-band,spanning the frequency band 110-170 GHz,has abundant spectrum resources and license-free characteristics[1,2].

关键词： IoT wireless band

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A Full Coverage Test Method for Configurable Logic Blocks in FPGA

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Chinese Journal of Electronics 2023年第3期22卷 471-476页

作者： FU Yong WANG Chi CHEN Liguang LAI Jinmei State Key Laboratory of ASIC and System Fudan University Shanghai China

FPGA's configurability makes it difficult for FPGA's manufacturers to fully test it. In this paper, a full coverage test method for FPGA's Configurable logic blocks (CLBs) is proposed, through which all basic logics of FPGA's every CLB can be fully tested. Innovative test circuits are designed using FPGA's internal resources to build Iterative logic arrays (ILAs) for Look-up tables (LUTs), distributed random access memories, configurable registers and other logics. The programmable interconnects needed to connect CLBs in these test circuits are also repeatable, making the configuration process much easier and the test speed much faster. The test method is transplantable and independent of FPGA's array size, so it can be applied to the test of different FPGAs. Xilinx's Virtex FPGA is taken as an example to explain our method, where only 19 test configurations are needed to achieve 100% coverage for all CLBs. To evaluate the test method reliably and guide the process of test vectors generation, a fault simulator - Turbofault is used to simulate FPGA's test coverage.

关键词： Simulation Random access memory Programmable logic arrays Logic gates Table lookup Registers Circuit faults

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Terahertz transmitter demonstration of the simultaneous transmission of optical and electrical terahertz band signals at 1 Tb/s bit rate and 50 m wireless delivery

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Science China(Technological Sciences) 2025年第3期68卷 380-382页

作者： Kaihui WANG Jianjun YU Chengzhen BIAN Junjie DING Jiao ZHANG Min ZHU Xiongwei YANG Weiping LI Yi WEI Mingxu WANG Qiutong ZHANG Ying WU Bo LIU Wen ZHOU Yuancheng CAI Bingchang HUA Mingzheng LEI Yucong ZOU Jianguo YU Feng ZHAO State Key Laboratory of ASIC and System Fudan UniversityShanghai200433China Purple Mountain Laboratories Nanjing211111China School of Electronic Engineering Beijing University of Posts and TelecommunicationsBeijing100876China School of Electronic Engineering Xi’an University of Posts and TelecommunicationsXi’an710121China

In recent years,free space optical communication(FSO)has been a hot topic in satellite-to-ground communications,inter-satellite communications,and wireless access networks[1-4].It has the advantages of rich spectrum resources,no need for spectrum authorization,high spectrum efficiency verified by experiments,narrow beam angle,and low space loss under good *** point-to-point communications,the beam angle makes the FSO almost immune to multipath effects,and low-complexity Digital Signal Processing(DSP)algorithms can be used for recovery demodulation.

关键词： optical multipath spectrum

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