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薄膜铌酸锂片上集成多维复用光子器件(特邀)

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激光与光电子学进展 2024年第11期61卷 29-49页

作者：田永辉袁明瑞秦士敬李浩王思璇肖恢芙兰州大学物理科学与技术学院甘肃兰州730000

铌酸锂(LiNbO_(3))材料因其优异的电光、声光和非线性光学特性,被视为实现高性能集成光电子芯片的理想材料平台。近年来,随着晶圆级绝缘衬底上的铌酸锂(LNOI)薄膜的成功制备和微纳加工技术的突破,LNOI平台在大规模高速光电子器件集成方... 详细信息

铌酸锂(LiNbO_(3))材料因其优异的电光、声光和非线性光学特性,被视为实现高性能集成光电子芯片的理想材料平台。近年来,随着晶圆级绝缘衬底上的铌酸锂(LNOI)薄膜的成功制备和微纳加工技术的突破,LNOI平台在大规模高速光电子器件集成方面已展现出显著优势。在高速调制器等基础通信器件已成功利用光电子集成技术实现的基础上,通过多信道并行传输数据以扩展链路容量的先进多路复用技术也受到广泛关注。基于LNOI平台,多个复用维度的集成光子器件得以开发,旨在实现高速大容量光电子通信器件的单片集成。本文探讨了LNOI光波导以及近期报道的多维复用LNOI集成光子器件,包括波长、模式、偏振维度的光信号复用、调控等关键技术,介绍了器件的工作机制、设计原理和方法以及性能指标。最后,讨论了LNOI平台上多维复用集成光子器件面临的挑战和潜在解决方案。

关键词：集成光子器件薄膜铌酸锂光波导多维复用光互连

基于薄膜铌酸锂的双偏振光学模式复用器(特邀)

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光学学报 2024年第15期44卷 101-110页

作者：蒋永恒李星峰沈健肖恢芙袁明瑞张朴李颖弢张永苏翼凯田永辉兰州大学物理科学与技术学院甘肃兰州730000 上海交通大学区域光纤通信网与新型光通信系统国家重点实验室电子工程系上海200240

双偏振模式复用器由于只需要单个波长的激光源即可实现多信道复用,从而降低光链路的成本和功耗,目前已经受到研究人员的广泛关注。然而,由于绝缘体上铌酸锂(LNOI)平台中存在模式杂化现象,在该平台上制备双偏振模式复用器仍然具有一定的... 详细信息

双偏振模式复用器由于只需要单个波长的激光源即可实现多信道复用,从而降低光链路的成本和功耗,目前已经受到研究人员的广泛关注。然而,由于绝缘体上铌酸锂(LNOI)平台中存在模式杂化现象,在该平台上制备双偏振模式复用器仍然具有一定的挑战。本文在SiN-LNOI平台上提出并实验验证了具有6个数据通道的双偏振光学模式复用器,使用亚波长光栅调控不同模式的色散,以抑制模式杂化引入的串扰。所测得的器件插入损耗和模间串扰分别为3.1 dB和-10.1 dB。此外,成功演示了总净数据容量为1.52 Tbit/s的动态数据传输实验,这表明所提器件在未来高速大容量光通信中具有较大的应用潜力。

关键词：集成光学薄膜铌酸锂氮化硅偏振复用模式复用亚波长光栅

Tunable optical filter using second-order micro-ring resonator

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Chinese Physics B 2017年第2期26卷 250-253页

作者： Lin Deng Dezhao Li Zilong Liu Yinghao Meng Xiaonan Guo yonghui tian Institute or Microelectrtmics and Key Laboratory for Magtletism and Magnetic Materials of the Ministry of Education School of Physical Science and Technology Lanzhou University. Lanzhou 730000. China

In this paper, we design and fabricate a silicon integrated optical filter consisting of two cascaded micro-ring resonators and two straight waveguides. Two micro-heaters are fabricated on the top of two micro-rings respectively, which are employed to modulate the micro-rings to perform the function of a tunable optical filter by the thermo–optic effect. The static response test indicates that the extinction ratio and 3-d B bandwidth are 29.01 d B and 0.21 nm respectively, the dynamic response test indicates that the 10%–90% rise and 90%–10% fall time of the filter are 16 μs and 12 μs, respectively,which can meet the requirements of optical communication and information processing. Finally, the power consumption of the device is also characterized, and the total power consumption is about 9.43 m W/nm, which has been improved efficiently.

关键词： integrated optics wavelength filtering devices resonators photonic integrated circuits

Recent advances in integrated optical directed logic operations for high performance optical computing: a review

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Frontiers of Optoelectronics 2022年第1期15卷 1-17页

作者： Ciyuan Qiu Huifu Xiao Liheng Wang yonghui tian State Key Lab of Advanced Optical Communication Systems and Networks Department of Electronic EngineeringShanghai Jiao Tong UniversityShanghai 200240China Institute of Microelectronics and Key Laboratory for Magnetism and Materials of Ministry of Education School of Physical Science and TechnologyLanzhou UniversityLanzhou 730000China

Optical directed logic(DL)is a novel logic operation scheme that employs electrical signals as operands to control the working states of optical switches to perform the logic *** review first provides an overview of the concept and working principle of *** developing trends of DL computing are then discussed in detail,including the fundamental optical DL gates,combinational optical DL operations,reconfigurable logic computing,low power optical logic computing,and programmable photonic *** concluding remarks provide an outlook on the DL future development and its impacts in optical computing.

关键词： Optical computing Directed logic(DL) Optical switch

Mechanistic investigation on Ag-Cu_(2)O in electrocatalytic CO_(2) to CH_(4) by in situ/operando spectroscopic and theoretical analysis

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Journal of Energy Chemistry 2024年第1期88卷 521-531,I0012页

作者： Min Sun Luxiao Zhang Fuli tian Jiaxin Li Yanqiu Lei Heng Zhang Lifeng Han Zhihua Guo yonghui Gao Fenrong Liu Yan Wang Luhui Wang Shanghong Zeng School of Chemistry and Chemical Engineering Inner Mongolia UniversityHohhot 010021Inner MongoliaChina Key Laboratory of Medicinal and Edible Plants Resources of Hainan Province Hainan Vocational University of Science and TechnologyHaikou 571126HainanChina State Key Laboratory of Baiyunobo Rare Earth Resource Research and Comprehensive Utilization Baotou Research Institute of Rare EarthsBaotou 014030Inner MongoliaChina Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control Zhejiang Ocean UniversityZhoushan 316022ZhejiangChina

Silver-copper electrocatalysts have demonstrated effectively catalytic performance in electroreduction CO_(2) toward CH_(4),yet a revealing insight into the reaction pathway and mechanism has remained ***,we construct chemically bonded Ag-Cu_(2)O boundaries,in which the complete reduction of Cu_(2)O to Cu has been strongly impeded owing to the presence of surface Ag *** interfacial confinement effect helps to maintain Cu^(+)sites at the Ag-Cu_(2)O *** in situ/operando spectroscopy and theoretical simulations,it is revealed that CO_(2) is enriched at the Ag-Cu_(2)O boundaries due to the enhanced physisorption and chemisorption to CO_(2),activating CO_(2) to form the stable intermediate^(*)*** boundaries between Ag shell and the Cu_(2)O mediate local^(*)CO coverage and promote^(*)CHO intermediate formation,consequently facilitating CO_(2)-to-CH_(4) *** work not only reveals the structure-activity relationships but also offers insights into the reaction mechanism on Ag-Cu catalysts for efficient electrocatalytic CO_(2) reduction.

关键词： Ag shell Interfacial confinement effect Cu~+ Local*CO coverage CO_(2)reduction

Crystalline-amorphization-recrystallization structural transition and emergent superconductivity in van der Waals semiconductor SiP under compression

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Science China(Physics,Mechanics & Astronomy) 2024年第5期67卷 115-122页

作者： Chunhua Chen Zhenyu Ding yonghui Zhou Yifang Yuan Nixian Qian Jing Wang Shuyang Wang Ying Zhou Chao An Min Zhang Xuliang Chen Xiaoping Yang Mingliang tian Zhaorong Yang Anhui Key Laboratory of Low-Energy Quantum Materials and Devices High Magnetic Field LaboratoryHFIPSChinese Academy of SciencesHefei 230031China Science Island Branch of Graduate School University of Science and Technology of ChinaHefei 230026China Key Laboratory of Material Physics Ministry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityHefei 230601China Institutes of Physical Science and Information Technology Anhui UniversityZhengzhou 450001China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China

van der Waals(vdW)semiconductors have gained significant attention due to their unique physical properties and promising applications,which are embedded within distinct crystallographic ***,we report a pressure-induced crystallineamorphization-recrystallization transition under compression in binary vdW semiconductor *** compression to 52 GPa,bulk SiP undergoes a consecutive phase transition from pristine crystalline to amorphous phase,ultimately to recrystallized *** employing synchrotron X-ray diffraction experiments in conjunction with high-pressure crystal structure searching techniques,we reveal that the recrystallized Si P hosts a tetragonal structure(space group I4mm)and further transforms partially into a cubic phase(space group Fm3m).Consistently,electrical transport and alternating-current magnetic susceptibility measurements indicate the presence of three superconducting phases,which are embedded in separate crystallographic symmetries—the amorphous,tetragonal,and cubic ***,a high superconducting transition temperature of 12.3 K is observed in its recovered tetragonal phase during *** findings uncover a novel phase evolution path and elucidate a pressure-engineered structure-property relationship in vdW semiconductor *** results not only offer a new platform to explore the transformation between different structures and functionalities,but also provide new opportunities for the design and exploration of advanced devices based on vdW materials.

关键词： recrystallization transition amorphous

High-speed electro-optic modulation in topological interface states of a one-dimensional lattice

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Light(Science & Applications) 2023年第9期12卷 1961-1970页

作者： Yong Zhang Jian Shen Jingchi Li Hongwei Wang Chenglong Feng Lei Zhang Lu Sun Jian Xu Ming Liu Ying Wang yonghui tian Jianwen Dong Yikai Su State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic EngineeringShanghai Jiao Tong UniversityShanghai 200240China Center for Advanced Electronic Materials and Devices Shanghai Jiao Tong UniversityShanghai 200240China Institute of Microelectronics and Key Laboratory for Magnetism and Magnetic Materials of MOE School of Physical Science and TechnologyLanzhou UniversityLanzhou 730000 GansuChina State Key Laboratory of Optoelectronic Materials and Technologies&School of Physics Sun Yat-sen UniversityGuangzhou 510275China

lectro-optic modulators are key components in data communication,microwave photonics,and quantum *** bandwidth,energy efficiency,and device dimension are crucial metrics of ***,we provide an important direction for the miniaturization of electro-optic modulators by reporting on ultracompact topological modulators.A topological interface state in a one-dimensional lattice is implemented on a thin-film lithium-niobate integrated *** to the strong optical confinement of the interface state and the peaking enhancement of the electro-optic response,a topological cavity with a size of 1.6×140μm^(2)enables a large modulation bandwidth of 104 *** first topological modulator exhibits the most compact device size compared to reported LN modulators with bandwidths above 28 GHz,to the best of our knowledge.100 Gb/s non-return-to-zero and 100 Gb/s four-level pulse amplitude modulation signals are *** switching energy is 5.4 fJ/bit,owing to the small electro-optic mode volume and low *** topological modulator accelerates the response time of topological photonic devices from the microsecond order to the picosecond order and provides an essential foundation for the implementation of large-scale lithium-niobate photonic integrated circuits.

关键词： modulator interface lattice

超厚钢筋混凝土剪力墙模板的内支撑施工技术分析

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山西建筑 2019年第7期45卷 132-134页

作者：田永辉河南五建建设集团有限公司河南郑州450000

结合某办公楼的工程案例,分析了超厚钢筋混凝土施工中剪力墙模板的内支撑施工技术的应用,指出该技术的应用不仅提升了模板的支撑力,而且加快了工程进度,降低了工程施工成本,使建筑工程的安全性得到提升。

关键词：钢筋混凝土剪力墙模板内支撑施工技术

Enhancing oxidative desulfurization of polyoxometalate by integrating with a self-reductive framework

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Science China Materials 2024年第9期67卷 2925-2933页

作者： yonghui Lin Xiaojun Zhao Shenzhen Chang Yixin Zhang Letian Gan Yuyang tian Qinhe Pan Guangshan Zhu Key Laboratory of Advanced Materials of Tropical Island Resources Ministry of EducationSchool of Chemistry and Chemical EngineeringHainan UniversityHaikou570228China Faculty of Chemistry Northeast Normal UniversityChangchun130024China

With the strict control of sulfur content in fuels,oxidative desulfurization(ODS),a promising desulphurization technology,needs to be continuously *** this study,we integrated multiple approaches(fabricating a porous structure,increasing phosphomolybdic acid(PMo)loading,improving amphiphilicity,and enhancing the intrinsic activity of PMo using a reductive framework)into PAF-54 carriers to improve ODS catalytic *** catalytic performance suggested that PAF-54 was not simply used as a carrier for PMo by physical *** the binding process,electron transfer between PAF-54 and PMo formed Mo^(5+)with superior catalytic *** to the presence of PAF-54,the catalytic activity of PMo as the active component qualitatively improved to achieve rapid and efficient *** importantly,we found that other nitrogen-rich porous organic polymers can also reduce some of Mo^(6+)in PMo during loading,and its formation mechanism was *** work provides a feasible strategy for designing highly efficient DOS catalysts.

关键词： PAF-54 self-reduction oxidative desulfurization Mo^(5+)