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Enhanced optical nonlinearity in a silicon–organic hybrid slot waveguide for all-optical signal processing

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Photonics Research 2022年第1期10卷 50-58页

作者： YONGHUA WANG SU HE XIAOYAN GAO PIAOPIAO YE LEI LEI wenchan dong XINLIANG ZHANG PING XU College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China

Silicon photonic integrated devices used for nonlinear optical signal processing play a key role in ultrafast switching,computing,and modern optical ***,current devices suffer from limited operation speeds and low conversion efficiencies due to the intrinsically low nonlinear index of *** this paper,we experimentally demonstrate enhanced optical nonlinearity in a silicon–organic hybrid slot waveguide consisting of an ultranarrow slot waveguide coated with a highly nonlinear organic *** fabricated slot area is as narrow as 45 nm,which is,to the best of our knowledge,the narrowest slot width that has been experimentally reported in silicon slot *** nonlinear coefficient of the proposed device with a length of 3 mm is measured to be up to 1.43×10^(6) W^(-1)km^(-1).Based on the nanostructure design,the conversion efficiencies of degenerate four-wave mixing showed enhancements of more than 12 dB and 5 dB compared to those measured for an identical device without the organic material and a silicon strip waveguide,*** a proof of concept,all-optical canonical logic units based on the prepared device with two inputs at 40 Gb/s are *** obtained logic results showed clear temporal waveforms and wide-open eye diagrams with error-free performance,illustrating that our device has great potential for use in high-speed all-optical signal processing and high-performance computing in the nodes and terminals of optical networks.

关键词： waveguide optical slot

Photonic matrix multiplication lights up photonicaccelerator and beyond

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Light(Science & Applications) 2022年第2期11卷 158-178页

作者： Hailong Zhou Jianji dong Junwei Cheng wenchan dong Chaoran Huang Yichen Shen Qiming Zhang Min Gu Chao Qian Hongsheng Chen Zhichao Ruan Xinliang Zhang Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China Department of Electronic Engineering The Chinese University of Hong KongShatinHong KongChina Lightelligence Hangzhou 311121China Institute of Photonic Chips University of Shanghai for Science and TechnologyShanghai 200093China Centre for Artificial-Intelligence Nanophotonics School of Optical-Electrical and Computer EngineeringUniversity of Shanghai for Science and TechnologyShanghai 200093China Interdisciplinary Center for Quantum Information State Key Laboratory of Modern Optical InstrumentationZJUHangzhou Global Scientific and Technological Innovation CenterZJU-UIUC InstituteZhejiang UniversityHangzhou 310027China Interdisciplinary Center of Quantum Information State Key Laboratory of Modern Optical Instrumentationand Zhejiang Province Key Laboratory of Quantum Technology and DeviceDepartment of PhysicsZhejiang UniversityHangzhou 310027China

Matrix computation,as a fundamental building block of information processing in science and technology,contributes most of the computational overheads in modern signal processing and artificial intelligence *** accelerators are designed to accelerate specific categories of computing in the optical domain,especially matrix multiplication,to address the growing demand for computing resources and *** matrix multiplication has much potential to expand the domain of telecommunication,and artificial intelligence benefiting from its superior *** research in photonic matrix multiplication has flourished and may provide opportunities to develop applications that are unachievable at present by conventional electronic *** this review,we first introduce the methods of photonic matrix multiplication,mainly including the plane light conversion method,Mach–Zehnder interferometer method and wavelength division multiplexing *** also summarize the developmental milestones of photonic matrix multiplication and the related ***,we review their detailed advances in applications to optical signal processing and artificial neural networks in recent ***,we comment on the challenges and perspectives of photonic matrix multiplication and photonic acceleration.

关键词： interferometer beyond matrix

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复用护理器械消毒清洁度自动检测方法研究

自动化与仪器仪表 2020年第11期 194-197页

作者：徐同顺董文禅刘晓静孙蕊甄朵朵石家庄市第四医院石家庄050011 圣禄嘉妇产医院石家庄050000

利用常规自动检测方法检测复用护理器械,自动生成的污染阳性率结果不够精准,导致得出的器械消毒清洁度结果不够真实,因此提出对复用护理器械消毒清洁度的新式自动检测方法。该方法以一套完善的检测设备为研究前提,根据扫描面积公式一次... 详细信息

利用常规自动检测方法检测复用护理器械,自动生成的污染阳性率结果不够精准,导致得出的器械消毒清洁度结果不够真实,因此提出对复用护理器械消毒清洁度的新式自动检测方法。该方法以一套完善的检测设备为研究前提,根据扫描面积公式一次识别残留物质,按照分子特征属性剔除无污染成分,完成对器械表面物质的二次识别;模糊聚类待检测分子,参照目标函数,用一个的二维隶属矩阵,定性分析残留物活性;根据分子活跃程度计算污染阳性率,自动判别检测器械的清洁程度。实验结果表明,与常规的检测方法相对比,所提出的自动检测方法,计算得到的污染阳性率更精准,判别复用护理器械消毒、清洁度的结果更加真实。由此可见,所提出的自动检测方法,更符合当前阶段的医疗器械清洁效果评价要求。

关键词：复用护理器械消毒清洁度自动检测污染阳性率

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溶胶-凝胶法氧化锌薄膜导热性能实验研究

太阳能学报 2018年第12期39卷 3350-3355页

作者：王洪伟林欢董华张敬奎张文婵李凯明青岛理工大学环境与市政工程学院

采用溶胶-凝胶法制备氧化锌前驱体溶液,用浸渍提拉法在玻璃纤维上制备厚度分别为39和17nm的氧化锌薄膜,利用瞬态电热技术测量得到100和200℃退火温度下氧化锌薄膜沿面内方向的导热系数,并对影响结果的因素进行分析。实验结果表明,前驱... 详细信息

采用溶胶-凝胶法制备氧化锌前驱体溶液,用浸渍提拉法在玻璃纤维上制备厚度分别为39和17nm的氧化锌薄膜,利用瞬态电热技术测量得到100和200℃退火温度下氧化锌薄膜沿面内方向的导热系数,并对影响结果的因素进行分析。实验结果表明,前驱体溶液浓度增加,氧化锌薄膜导热系数变大,且100℃退火下氧化锌薄膜的导热系数大于200℃退火下导热系数。

关键词：溶胶-凝胶法氧化锌薄膜瞬态电热技术导热系数

基于幅频矢量匹配的DV-hop定位算法优化

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山东科技大学学报（自然科学版） 2014年第3期33卷 98-102页

作者：郭银景郑小霞宋文灿张露董晓亮山东科技大学电子通信与物理学院山东青岛266590

矿井巷道环境复杂多变,DV-hop算法应用于井下定位时效果不理想,因而,基于幅频矢量匹配对经典DVhop算法定位结果进行优化。利用经典DV-hop算法找到井下移动节点位置大致区域,将节点接收到的各锚节点信标信号的幅频矢量与数据库中煤矿巷... 详细信息

矿井巷道环境复杂多变,DV-hop算法应用于井下定位时效果不理想,因而,基于幅频矢量匹配对经典DVhop算法定位结果进行优化。利用经典DV-hop算法找到井下移动节点位置大致区域,将节点接收到的各锚节点信标信号的幅频矢量与数据库中煤矿巷道各点的幅频矢量相匹配,最终确定移动节点的精确位置信息。仿真结果表明:优化后的DV-hop算法,平均定位精度和定位覆盖率明显优于经典的DV-hop算法;随着锚节点数的增加,优化后的DV-hop算法的平均定位误差呈明显下降趋势。

关键词：幅频矢量匹配 DV-hop算法井下定位移动节点

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岷江上游流域地貌发育阶段

四川师范大学学报（自然科学版） 2021年第5期44卷 694-698页

作者：陈浩董廷旭李勇文星跃绵阳师范学院资源环境工程学院四川绵阳621006 成都理工大学油气藏地质及开发工程国家重点实验室四川成都610059 西华师范大学国土资源学院四川南充637002

对岷江上游流域地貌发育阶段及成因进行分析,有助于揭示研究区地貌演化规律及青藏高原东缘晚新生代以来新构造活动的差异性.基于数字高程模型(DEM)数据,利用ArcGIS水文分析模块,通过均值变点法获取岷江上游流域水系网络最佳提取阈值,运... 详细信息

对岷江上游流域地貌发育阶段及成因进行分析,有助于揭示研究区地貌演化规律及青藏高原东缘晚新生代以来新构造活动的差异性.基于数字高程模型(DEM)数据,利用ArcGIS水文分析模块,通过均值变点法获取岷江上游流域水系网络最佳提取阈值,运用起伏比法计算岷江干流东西两侧各亚流域盆地发育期次.结果表明,岷江断裂和汶川—茂县断裂所围合川西高原地区的大型亚流域盆地均处于早壮年期发育阶段,其发育期次比断裂外侧岷山断块和龙门山冲断带地区亚流域盆地发育期次相对年轻.究其原因,主要是断裂活动驱动的逆冲作用导致断裂上盘块体沿断层面垂直隆升,位于其上的亚流域盆地处于不均衡发育状态.

关键词：岷江上游流域地貌发育阶段集水面积阈值均值变点法