检索结果-内蒙古大学图书馆

IEEE International Conference on solid-state Circuits (ISSCC)

作者： Huan-Cheng Liao Shunyao Zhang Yumin Su Arvind Govinday Yiwei Zou Wei Wang Vivek Boominathan Ashok Veeraraghavan Lei Li Kaiyuan Yang Rice University Houston TX

ISBN: (数字)9798331541019

ISBN: (纸本)9798331541026

Wearable deep-tissue imaging technologies promise a paradigm shift to preventive, proactive, and accessible health care. Real-time and long-term imaging offers unprecedented insights into one's body conditions, enabling constant monitoring of high-risk patients (e.g., cardiovascular [1] and musculoskeletal [2]), tracking fetal development [3], and overseeing recovery after surgeries. These devices also make medical imaging more accessible and affordable in low-income countries. Ultrasound and photoacoustic (PA) imaging modalities are well suited for such applications because of their high resolution for imaging deep tissue and fewer safety concerns. Compared to the well-known ultrasound, emerging PA technology [4], [5] employs optical excitation and ultrasonic readout, governed by PA effects, to achieve higher molecular contrast and sensitivity based on the agents' optical absorption properties while offering similar depth and resolution. Thus, this work targets a compact and low-power PA RX with data compression as a key enabler of the envisioned wireless wearable PA imager. It is worth noting that PA and ultrasound RX share similar sensor arrays and readout circuits, except that the amplitude of received PA signals is roughly ten times smaller than that of ultrasound due to an extra stage of energy transduction and light exposure limits. Thus, we discuss and compare ultrasound and PA RX designs together in this paper.

关键词： Wireless communication Wireless sensor networks Ultrasonic imaging Image resolution Biomedical optical imaging Surgery Optical imaging solid state circuits Optical sensors Biomedical monitoring

来源：评论

学校读者我要写书评

暂无评论

Continuous terahertz omnidirectional beam steering by dual diffraction of metagratings

引用

Photonics Research 2023年第1期11卷 44-54页

作者： JIE-RONG CHENG YANG YANG SAI CHEN QI-YE WEN YUN-YUN JI FEI FAN SHENG-JIANG CHANG Institute of Modern Optics Nankai UniversityTianjin 300350China Tianjin Key Laboratory of Micro-Scale Optical Information Science and Technology Tianjin 300350China School of Electronic and Information Engineering Beihang UniversityBeijing 100191China State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of ChinaChengdu 610054China Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology Tianjin 300350China

Dynamic beam steering with unlimited angular range and fast speed remains a challenge in the terahertz gap,which is urgently needed for next-generation target tracking,wireless communications,and imaging *** from metasurface phased arrays with element-level phase control,here we steer the beam by globally engineering the diffraction of two cascaded metagratings during in-plane *** from large-angle diffraction and flexible on/off control of the diffraction channels,a pair of metagratings with optimized supercells and proper orientation successfully directs the incoming beam towards any arbitrary direction over the transmission half space,with the steering speed improved more than twice that of the small-angle diffractive ***-beam and dual-beam steering within the solid angle of 1.56πand elevation angle of±77°has been demonstrated with average throughput efficiency of 41.4%at 0.14 THz,which can be generalized to multiple-beam *** dual diffraction engineering scheme offers a clear physical picture for beamforming and greatly simplifies the device structure,with additional merits of large aperture and low power consumption.

关键词： beam directional globally

来源：评论

学校读者我要写书评

暂无评论

A universal 3D imaging sensor on a silicon photonics platform

引用

NATURE 2021年第7845期590卷 256-261页

作者： Rogers, Christopher Piggott, Alexander Y. Thomson, David J. Wiser, Robert F. Opris, Ion E. Fortune, Steven A. Compston, Andrew J. Gondarenko, Alexander Meng, Fanfan Chen, Xia Reed, Graham T. Nicolaescu, Remus Pointcloud Inc San Francisco CA 94107 USA Univ Southampton Optoelect Res Ctr Southampton Hants England Opris Consulting San Jose CA USA

A compact, high-performance silicon photonics-based light detection and ranging system for three-dimensional imaging is developed that should be amenable to low-cost mass manufacturing Accurate three-dimensional (3D) imaging is essential for machines to map and interact with the physical world(1,2). Although numerous 3D imaging technologies exist, each addressing niche applications with varying degrees of success, none has achieved the breadth of applicability and impact that digital image sensors have in the two-dimensional imaging world(3-10). A large-scale two-dimensional array of coherent detector pixels operating as a light detection and ranging system could serve as a universal 3D imaging platform. Such a system would offer high depth accuracy and immunity to interference from sunlight, as well as the ability to measure the velocity of moving objects directly(11). Owing to difficulties in providing electrical and photonic connections to every pixel, previous systems have been restricted to fewer than 20 pixels(12-15). Here we demonstrate the operation of a large-scale coherent detector array, consisting of 512 pixels, in a 3D imaging system. Leveraging recent advances in the monolithic integration of photonic and electronic circuits, a dense array of optical heterodyne detectors is combined with an integrated electronic readout architecture, enabling straightforward scaling to arbitrarily large arrays. Two-axis solid-state beam steering eliminates any trade-off between field of view and range. Operating at the quantum noise limit(16,17), our system achieves an accuracy of 3.1 millimetres at a distance of 75 metres when using only 4 milliwatts of light, an order of magnitude more accurate than existing solid-state systems at such ranges. Future reductions of pixel size using state-of-the-art components could yield resolutions in excess of 20 megapixels for arrays the size of a consumer camera sensor. This result paves the way for the development and proliferati

关键词： Electrical and electronic engineering Imaging and sensing Integrated optics Nanophotonics and plasmonics

来源：评论

学校读者我要写书评

暂无评论

First characterization results of ARCADIA FD-MAPS after X-ray irradiation

引用

JOURNAL OF INSTRUMENTATION 2023年第1期18卷 C01066-C01066页

作者： Neubuser, C. Corradino, T. Dalla Betta, G. -F. Mattiazzo, S. Pancheri, L. TIFPA INFN Via Sommarive 14 Trento Italy Univ Trento Dept Ind Engn Via Sommarive 9 Trento Italy Univ Padua Dept Phys & Astron Via Marzolo 8 Padua Italy INFN Padova Padua Italy

The ARCADIA collaboration is developing fully-depleted (FD) Monolithic Active Pixel sensors (MAPS) in a 110 nm CMOS process in collaboration with LFoundry. The sensor design incorporates an n+ collection node within a n-type epi-layer on top of a high-resistivity n-type substrate and p+ backside. Thus, the pn-junction sits on the backside and through an applied backside bias, the full substrate gets depleted. The targeted applications of this technology range from future high energy physics experiments to space applications, and medical and industrial scanners. Together, these applications set the minimum requirements on the detector: data collec-tion at hit rates of (10-100) MHz/cm2, full signal processing within (1-10) mu s, maximum power consumption (5-20) mW/cm2 and radiation tolerances of up to 3.4 Mrad or 6.2 x 1012 1 MeV neutron equivalent fluence. In order to proof the performance of the technology, a demonstrator chip of 512 x 512 pixels with 25 mu m pitch was designed and fabricated in a first engineering run in 2021, together with additional test structures of pixel and strip arrays with different pitches and sensor geometries. The production run has produced functional passive and active pixel matrices. Earlier studies have shown that positive oxide charges and traps at the Si-SiO2 interface, introduced by ionising radiation, affect the depletion region around the collection electrode, increasing the pixel capacitance. By varying the gap size between collection node and pwells, the geometry can be optimised to keep the capacitance low also after irradiation. To study the performance after irradiation, of the optimised diode designs, the passive pixel matrices were irradiated with doses up to 10 Mrad (SiO2) using a X-ray tube with a Tungsten anode. The measurements are complemented by TCAD simulations. The maximum capacitance increase after irradiation was found to reach 6 and 12 fF/pixel for pixel pitches of 25 and 50 mu m, respectively. The relative cap

关键词： Detector modelling and simulations ii (electric fields charge transport multiplication and induction pulse formation electron emission etc ) Particle tracking detectors (solid-state detectors) Radiation-hard detectors solid state detectors

来源：评论

学校读者我要写书评

暂无评论

A Heterogeneous Integration System of Analog in-Memory Computing and Field-Programmable Gate Array

A Heterogeneous Integration System of Analog in-Memory Compu...

引用

International Conference on solid-state and Integrated Circuit Technology

作者： Hua Chen Yiming Qu Wenhao Wu Yi Zhao School of Integrated Circuits East China Normal University Shanghai China China Nanhu Academy of Electronics and Information Technology Jiaxing China College of Information Science and Electronic Engineering Zhejiang University Hangzhou China

ISBN: (数字)9798350361834

ISBN: (纸本)9798350361841

With the development of deep learning models, deploying neural networks to resource-limited edge devices has become a trend. However, the high computation requirements and energy consumption of neural network models have limited their development. Analog In-Memory Computing (AIMC) features high energy efficiency, providing new opportunities for the edge deployment of neural networks. The system needs to support different types of neural network models in practical applications, and the system-level application is still immature. This paper proposes a heterogeneous system integrating analog in-memory computing and Field-Programmable Gate Array (FPGA). The system reserves multiple sensor interfaces for access and preprocessing peripherals, including digital NN accelerators and AIMC, which can effectively execute various layers in neural network models, achieving complete end-to-end neural network inference. Depending on the size and number of FC layers, the system has varying degrees of improvement in inference time and RAM occupation.

关键词： Integrated circuit technology Energy consumption Computational modeling Random access memory Multichip modules Artificial neural networks In-memory computing Market research Energy efficiency Field programmable gate arrays

来源：评论

学校读者我要写书评

暂无评论

A derivation of the electric field inside MAPS detectors from beam-test data and limited TCAD simulations

引用

JOURNAL OF INSTRUMENTATION 2023年第5期18卷 P05007页

作者： Santra, A. Hod, N. Tal Weizmann Inst Sci Dept Particle Phys & Astrophys 234 Herzl St IL-7610001 Rehovot Israel

solid semiconductor sensors are used as detectors in high-energy physics experiments, in medical applications, in space missions and elsewhere. Minimal knowledge of the electric field inside the elementary cells of these sensors is highly important for their performance understanding. The field governs the charge propagation processes and ultimately determines the size and quality of the electronic signal of the cell. Hence, the simulation of these sensors as detectors in different analyses relies strongly on the field knowledge. For a certain voltage applied to the cell, the field depends on the specifics of the device's growth and fabrication. The information about these is often commercially protected or otherwise very difficult to encode in state-of-the-art technology computer-aided-design (TCAD) software. In this work, we show that by taking the top-down approach, combining public beam-test data and a very limited public TCAD knowledge, we are able to effectively approximate the 3D electric field function in the pixel cell of one important and widely used example, namely the ALPIDE sensor, for simulating the charge propagation processes. Despite its broad usage worldwide, the ALPIDE field is not available to the community. We provide an effective field function, that adequately describes the sensor behaviour without trying to reconstruct further details about the device or the details behind its processing. We comment on the process by which the effective field function is derived with the help of the Allpix2 software, and on how similar work can be performed for other devices, starting from the same grounds.

关键词： Detector modelling and simulations ii (electric fields charge transport multiplication and induction pulse formation electron emission etc) Particle tracking detectors (solid-state detectors) Charge transport and multiplication in solid media solid state detectors

来源：评论

学校读者我要写书评

暂无评论

Surface engineered bimetallic gold/silver nanoclusters for in situ imaging of mercury ions in living organisms

引用

ANALYTICAL AND BIOANALYTICAL CHEMISTRY 2022年第14期414卷 4235-4244页

作者： Wang, Jianping Wang, Wang Yang, Linlin Zhao, Jun Han, Guangmei Yu, Xiaoping ShenTu, Xuping Ye, Zihong China Jiliang Univ Coll Life Sci Zhejiang Prov Key Lab Biometrol & Inspect & Quara Hangzhou 310018 Peoples R China West Anhui Univ Sch Mat & Chem Engn Key Lab Biomimet Sensor & Detecting Technol Anhui Luan 237012 Anhui Peoples R China Chinese Acad Sci Inst Solid State Phys Hefei Inst Phys Sci Hefei 230031 Anhui Peoples R China

Chemical sensing for the sensitive and reliable detection of mercury(ii) ions (Hg2+) is of great importance in environmental protection, food safety, and biomedical applications. Due to the bio-enrichment property of Hg2+ in organisms, it is particularly meaningful to develop an effective tool that can in situ and rapidly monitor the level of Hg2+ in living organisms. In this work, we report ligand functionalized gold-silver bimetallic nanoclusters with bright red fluorescence as intracellular probes for imaging Hg2+ in living cells and zebrafish. The bimetallic nanoclusters of DTT-GSH@Au/AgNCs (DG-Au/AgNCs) with strong fluorescence that benefited from the synergistic effect of Au and Ag atoms were obtained through a one-pot synthesis method, incorporating glutathione (GSH) and dithiothreitol (DTT) as the reducers and functionalized ligands. Attractively, the bright red fluorescence of DG-Au/AgNCs could be rapidly and selectively quenched by Hg2+ within 1 min with a very low detection limit of 1.01 nM. Additionally, DG-Au/AgNCs had a great advantage in the detection of Hg2+ in living cells and zebrafish owing to its notably strong red fluorescence at 665 nm, which could avoid effectively auto-fluorescence interference from the organism. Such easily prepared bimetallic fluorescent nanoclusters would be expected to provide a noninvasive and sensitive approach in the detection of heavy metals in situ for environmental protection.

关键词： Bimetallic nanoclusters Red emission Hg2+ In situ Bioimaging

来源：评论

学校读者我要写书评

暂无评论

HOT MWIR TECHNOLOGY AT SCD 48

HOT MWIR TECHNOLOGY AT SCD

引用

Conference on Infrared Technology and applications XLViiI Part of SPIE Defense and Commercial Sensing Conference

作者： Klipstein, P. C. Armon, E. Avnon, E. Benny, Y. Brumer, M. Cohen, Y. Fraenkel, N. Gliksman, S. Glozman, A. Hathri, N. Hirsh, I Katz, M. Klin, O. Langof, L. Lukomsky, I Marderfeld, I Nahor, H. Nitzani, M. Rakhmilevich, D. Schusterman, S. Shafir, I Shtrichman, I Shkedy, L. Sicron, N. Snapi, N. Yaron, N. SemiCond Devices POB 2250 IL-31021 Haifa Israel Israel Ctr Adv Photon IL-81800 Yavne Israel Soreq NRC Appl Phys Div Solid State Phys Dept IL-81800 Yavne Israel

ISBN: (纸本)9781510650916;9781510650909

SCD is a leading manufacturer of MWIR InSb Focal Plane arrays (FPA) with formats up to 3 megapixels. Using photodiode layers grown by Molecular Beam Epitaxy (MBE), the operating temperature is raised to similar to 100 K, compared with 80 K for our legacy implanted junction technology. Due to the excellent manufacturability of iiI-V MBE materials, we have extended this approach in the development of our newer High Operating Temperature (HOT) MWIR technologies, all of which are based on XBn and XBp barrier devices which suppress the dark current generated by traps in the depletion layer. As a result we now produce a family of InAsSb XBn FPAs operating at 150 K with a cut-off wavelength of lambda(C) = 4.2 mu m Formats range between 0.33 megapixels and 5.24 megapixels and our latest "Crane" FPA has a pitch of just 5 mu m. These detectors are ideal for 24/7 surveillance and long-range applications, due to large formats, increased HOT cooler reliability and very high atmospheric transmission. For applications requiring HOT full MWIR (HFMW) performance (lambda(C) = similar to 4.9 mu m), we have explored three approaches, all of which have produced operating temperatures in the range 115- 125 K with high FPA operability and uniformity. Using a suitable design of buffer layer, we have extended the InAsSb XBn cut-off wavelength while maintaining a high quantum efficiency above 70%. Comparable performance has also been obtained in two lattice matched type ii superlattice (T2SL) architectures: XBn InAs/InAsSb and XBp InAs/GaSb. The three technologies give great flexibility in design optimization, and initial production of HFMW detectors is scheduled for mid 2022.

关键词： XBn XBp MWIR type ii superlattice photodetector

来源：评论

学校读者我要写书评

暂无评论

ARCADIA MAPS process qualification through the electrical characterization of passive pixel arrays

引用

JOURNAL OF INSTRUMENTATION 2023年第2期18卷 C02045页

作者： Corradino, T. Betta, G. F. Dalla Neubuser, C. Pancheri, L. Univ Trento Dept Ind Engn Via Sommar 9 Trento Italy TIFPA INFN Via Sommar 14 Trento Italy

The development of novel Monolithic Active Pixel sensor (MAPS) technologies has been pursued by several collaborations in the last two decades. The ARCADIA project aims to design fully depleted MAPS for medical, space, HEP and X-ray detection applications, that can be produced with a commercial 110 nm CMOS production process. Among the test structures of the first two engineering runs of the project, passive pixel arrays with different pitches and layouts were included. The main characteristics of the produced devices in terms of dark current, depletion voltage, punch through current and pixel capacitance have been evaluated from IV and CV characteristics of the pixel arrays. Groups of four samples have been extracted from as many different positions within each wafer and electrically characterized to obtain information on the variability in the pixel operating voltage range and in the pixel dark current, reflecting variations related to the employed production process. The experimental data demonstrated a good uniformity in the considered parameters for different sample positions within the produced wafers, as well as for samples extracted from different wafers with the same substrate type.

关键词： Detector design and construction technologies and materials solid state detec-tors Detector modelling and simulations ii (electric fields charge transport multiplication and induction pulse formation electron emission etc )

来源：评论

学校读者我要写书评

暂无评论

Inter-pixel cross-talk as background to two-photon interference effects in SPAD arrays

引用

JOURNAL OF INSTRUMENTATION 2024年第12期19卷 P12015页

作者： Kulkov, Sergei Potuckova, Tereza Bernasconi, Ermanno Bruschini, Claudio Milanese, Tommaso Charbon, Edoardo Shawkat, Mst Shamim Ara Nomerotski, Andrei Svihra, Peter Czech Tech Univ Fac Nucl Sci & Phys Engn Beehova 7 Prague Czech Republic Ecole Polytech Fed Lausanne EPFL Adv Quantum Architecture Lab Rue Maladiere 71 Neuchatel Switzerland Florida Int Univ Dept Elect & Comp Engn 10555 West Flagler St Miami FL 10555 USA Czech Acad Sci Dept Astroparticle Phys Inst Phys Slovance 1999-2 Prague Czech Republic Czech Acad Sci Dept Detector Dev & Data Proc Inst Phys Slovance 1999-2 Prague Czech Republic

Cross-talk is a well-known feature of single-photon avalanche detectors. It is especially important to account for this effect in applications involving temporal coincidences of two or more photons registered by the sensor since in this case the cross-talk may mimic the useful signal. In this work, we characterize the cross-talk of the LinoSPAD2 detector, as well as perform joint measurements of the cross-talk and Hanbury Brown-Twiss two-photon interference, comparing and cross-calibrating both effects. With a median dark count rate of 125 cps/pixel, we report the average cross-talk probability of 0.22% for the nearest neighbor and also observe a long-range cross-talk of the order 2 10(-5)% for channels separated by up to 20 pixels.

关键词： Timing detectors Interferometry Photon detectors for UV, visible and IR photons (solid-state) (PIN diodes, APDs, Si-PMTs, G-APDs, CCDs, EBCCDs, EMCCDs, CMOS imagers, etc) Timing detectors Interferometry

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：