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Effectively modulating spatial vortex four-wave mixing in a diamond atomic system

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Chinese Physics B 2024年第4期33卷 473-478页

作者：巴诺姜明奇费金友王丹蒋海林王磊王海华 National Demonstration Center for Experimental Physics Education College of PhysicsJilin Normal UniversitySiping 136000China College of Physics Jilin UniversityChangchun 130012China

Due to the spatial characteristics of orbital angular momentum,vortex fields can be applied in the fields of quantum storage and quantum *** study the realization of spatially modulated vortex fields based on four-wave mixing in a four-level atomic system with a diamond *** intensity and spiral phase of the vortex field are effectively transferred to the generated four-wave mixing *** changing the detuning of the probe field,the phase and intensity of the generated vertex four-wave mixing field can be *** the probe field takes a large detuning value,the spatial distribution of the intensity and phase of the vertex four-wave mixing field can be effectively tuned by adjusting the Rabi frequency or detuning value of the coupled *** the same time,we also provide a detailed explanation based on the dispersion relationship,and the results agree well with our simulation results.

关键词： coherent optical effects four-wave mixing orbital angular momentum

Fabrication of diamond-like Carbon Films by Ion Assisted Middle Frequency Unbalanced Magnetron Sputtering

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Chinese Journal of Aeronautics 2006年第B12期19卷 119-125页

作者： ZHANG Yi-chen SUN Shao-ni ZHOU Yi MA Sheng-ge ba De-chun School of Mechanical Engineering and Automation Northeastern University Shenyang 110004 China National R＆D Center for Surface Engineering of China Shenzhen 518029 China

diamond-like carbon （DLC） films are deposited by the Hall ion source assisted by the mid-frequency unbalanced magnetron sputtering technique. The effects of the substrate voltage bias, the substrate temperature, the Hall discharging current and the argon/nitrogen ratio on the DLC film＇s performance were studied. The experimental results show that the film＇s surface roughness, the hardness and the Young＇s modulus increase firstly and then decrease with the bias voltage incrementally increases. Also when the substrate temperature rises, the surface roughness of the film varies slightly, but its hardness and Young＇s modulus firstly increase followed by a sharp decrease when the temperature surpassing 120 ℃. With the Hall discharging current incrementally rising, the hardness and Young＇s modulus of the film decrease and the surface roughness of the film on 316L stainless steel firstly decreased and then remains constant.

关键词： fluid machinery and engineering diamond-like carbon films middle frequency unbalanced magnetron sputtering hall ion source

Magnetic field enhanced radio frequency ion source and its application for Si-incorporation diamond-like carbon film preparation

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Plasma Science and Technology 2020年第2期22卷 79-86页

作者： Jiping YIN Qing WANG Xinlong WU Chunyu CHENG Dechun ba Zeng LIN School of Mechanical Engineering&Automation Northeastern UniversityShenyang 110819People's Republic of China Key Laboratory of Implant Device and Interface Science of Liaoning Province Northeastern UniversityShenyang 110819People’s Republic of China

Various ion sources are key components to prepare functional coatings,such as diamond-like carbon(DLC)*** this article,we present our trying of surface modification on basis of Si-incorporation diamond-like carbon(Si-DLC)produced by a magnetic field enhanced radio frequency ion source,which is established to get high density plasma with the help of magnetic *** proper deposition process,a contact angle of 111°hydrophobic surface was achieved without any surface patterning,where nanostructure SiC grains appeared within the amorphous *** surface property was influenced by ion flow parameters as well as the resultant surface *** magnetic field enhanced radio frequency ion source developed in this paper was useful for protective film applications.

关键词： magnetic field enhanced radio frequency ion source Si-incorporation diamond-like carbon film microstructure hydrophobicity protective film

diamonds and Other Exotic Minerals Recovered from Peridotites of the Dangqiong Ophiolite, Western Yarlung-Zangbo Suture Zone, Tibet

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Acta Geologica Sinica(English Edition) 2016年第2期90卷 425-439页

作者： XIONG Fahui YANG Jingsui ROBINSON Paul T. XU Xiangzhen ba Dengzhu LI Yuan ZHANG Zhongming RONG He CARMA State Key Laboratory for Continental Tectonics and Dynamics Institute of Geology Chinese Academy of Geological Sciences

Various combinations of diamond, moissanite, zircon, quartz, corundum, rutile, titanite, almandine garnet, kyanite, and andalusite have been recovered from the Dangqiong peridotites. More than 80 grains of diamond have been recovered, most of which are pale yellow to reddish-orange to colorless. The grains are all 100-200 μm in size and mostly anhedral, but with a range of morphologies including elongated, octahedral and subhedral varieties. Their identification was confirmed by a characteristic shift in the Raman spectra between 1325 cm^-1 and 1333 cm^-1, mostly at 1331.51 cm^-1 or 1326.96 cm^-1. Integration of the mineralogical, petrological and geochemical data for the Dongqiong peridotites suggests a multi-stage formation for this body and similar ophiolites in the Yarlung-Zangbo suture zone. Chromian spinel grains and perhaps small bodies of chromitite crystallized at various depths in the upper mantle, and encapsulated the UHP, highly reduced and crustal minerals. Some oceanic crustal slabs containing the chromian spinel and their inclusion were later trapped in suprasubduction zones（SSZ）, where they were modified by island arc tholeiitic and boninitic magmas, thus changing the chromian spinel compositions and depositing chromitite ores in melt channels.

关键词： diamond Multi-stage formation Dangqiong ophiolite Yarlung-Zangbo suture zone

diamond Discovered in Dangqiong Ophiolite, Western Yarlung-Zangbu Suture Zone, Tibet

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Acta Geologica Sinica(English Edition) 2015年第A02期89卷 99-100页

作者： XIONG Fahui YANG Jingsui Robinson T.PAUL XU Xiangzhen ba Dengzhu LI Yuan LI Jinyang ZHANG Zhongming RONG He CARMA State Key Laboratory for Continental Tectonics and DynamicsInstitute of GeologyChinese Academy of Geological Sciences

The first diamonds from ophiolite were found in peridotite of Luobusa ophiolite along Yarlung Zangbu suture zone in Tibet, China （IGCAGS, 1981）, and then more and more diamonds found in harzgurgite （bai et al., 199... 详细信息

关键词： diamondS MINES & mineral resources ALLOYS OPHIOLITES GEMS & precious stones IGNEOUS rocks CHINA

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含氢类金刚石碳膜的拉曼光谱洛伦兹分解

东北大学学报（自然科学版） 2007年第4期28卷 573-575页

作者：蔺增巴德纯王凤东北大学机械工程与自动化学院辽宁沈阳110004

利用射频等离子体增强化学气相沉积(rf PECVD)工艺在不锈钢基底上制备a-C:H膜,利用激光Raman光谱表征所沉积碳膜的微观结构,特别是通过对拉曼谱图进行洛伦兹分解来评价所沉积碳膜的sp3含量,分析了沉积电压和过渡层对a-C:H膜生长过程及膜... 详细信息

利用射频等离子体增强化学气相沉积(rf PECVD)工艺在不锈钢基底上制备a-C:H膜,利用激光Raman光谱表征所沉积碳膜的微观结构,特别是通过对拉曼谱图进行洛伦兹分解来评价所沉积碳膜的sp3含量,分析了沉积电压和过渡层对a-C:H膜生长过程及膜中sp3含量的影响.结果表明,利用拉曼光谱的洛伦兹分解能够有效分析a-C:H的结构特性,碳膜沉积过程中沉积电压和过渡层对a-C:H膜的生长均具有重要影响.在本实验条件下,以Ti/TiN/TiC为过渡层沉积电压为2500 V时所制备的a-C:H膜中的sp3含量最高.

关键词：氢化类金刚石碳膜等离子体增强化学气相沉积拉曼光谱洛伦兹分解

射频PECVD方法生长含氢非晶碳膜的结构及摩擦学性能

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东北大学学报（自然科学版） 2007年第12期28卷 1745-1748页

作者：李明蔺增王凤巴德纯东北大学机械工程与自动化学院辽宁沈阳110004

利用射频等离子体增强化学气相沉积技术在不锈钢表面制备了含氢非晶碳膜.采用Raman光谱、红外光谱、X射线光电子能谱和原子力显微镜等研究了薄膜的微观结构和表面形貌,在栓盘摩擦磨损试验机上考察了薄膜在不同载荷与滑动速度下的摩擦学... 详细信息

利用射频等离子体增强化学气相沉积技术在不锈钢表面制备了含氢非晶碳膜.采用Raman光谱、红外光谱、X射线光电子能谱和原子力显微镜等研究了薄膜的微观结构和表面形貌,在栓盘摩擦磨损试验机上考察了薄膜在不同载荷与滑动速度下的摩擦学性能.结果表明:所制备的含氢非晶碳膜具有典型的类金刚石结构特征,薄膜均匀、致密,表面粗糙度小;薄膜与不锈钢球对磨时显示出良好的抗磨减摩性能;薄膜的抗磨减摩性能同对磨件表面上形成的转移膜以及摩擦过程中薄膜结构的石墨化相关.

关键词：射频等离子体增强化学气相沉积含氢非晶碳膜结构摩擦学性能

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电镀金刚石微磨具磨损机理分析与试验研究

机械工程学报 2015年第11期51卷 177-185页

作者：温雪龙巩亚东程军巴德纯东北大学机械工程与自动化学院沈阳110819

微磨削加工中磨粒的微观作用机理对研究微磨具的整体磨损和微磨具使用寿命的预测十分重要。分析电镀金刚石微磨具的磨损机理,针对微磨削区的复合作用过程与微磨具磨损形式的主要特征进行了几何与数学建模。通过考虑最小切屑厚度与尺寸... 详细信息

微磨削加工中磨粒的微观作用机理对研究微磨具的整体磨损和微磨具使用寿命的预测十分重要。分析电镀金刚石微磨具的磨损机理,针对微磨削区的复合作用过程与微磨具磨损形式的主要特征进行了几何与数学建模。通过考虑最小切屑厚度与尺寸效应等因素后提出并建立了微磨具磨粒微观磨损的数学模型,为了验证此模型的有效性,针对钠钙玻璃材料进行了不同磨削参数下的微磨削试验,分析微磨具磨损前后的磨头直径、磨损与破碎磨粒所占磨粒总数的比例和加工后试件表面粗糙度的变化规律。试验结果表明:加工后的试件表面质量越好磨损越缓慢;随着微磨削试验的进行,微磨具磨头直径经历了快速急剧减小和缓慢稳定减小两个阶段。磨损和破碎磨粒所占比例与磨损速度随主轴转速与进给率增大而增大,磨损和破碎磨粒的比例整体呈线性增长趋势。为提高微磨具的加工性能和延长微磨具的使用寿命提供了理论参考和试验依据。

关键词：微尺度磨削磨损机理微磨具

Comparison of One-Step and Multistep Polishing Systems for the Surface Roughness of Resin Composites

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Open Journal of Stomatology 2016年第3期6卷 73-80页

作者： Ismail Hakkı baltacıoğlu Ozgur Irmak Nuran Ulusoy Esra Cengiz Yıldırım Hakan bağış Department of Restorative Dentistry Faculty of Dentistry Ankara University Ankara Turkey Department of Restorative Dentistry Faculty of Dentistry Osmangazi University Eskisehir Turkey Department of Restorative Dentistry Faculty of Dentistry Near East University Mersin Turkey

Aim: This study analyzed the effect of different finishing and polishing systems on the surface roughness of a microfilled (Amaris), and a nanofilled resin composite (Clearfil Majesty Esthetic) using Scanning electron microscope (SEM) analysis and surface roughness tester. Materials and Methods: Thirty five specimens of each material were prepared in a plexiglass mold (10 mm in diameter and 2 mm in depth) and cured against a Mylar matrix strip to create a baseline surface. The average surface roughness was measured using a surface profilometer (Mahr Perthometer SP4, Germany) in three different positions on each sample before and after finishing with one of the seven finishing procedures: Procedure 1: Mylar strip (control), Procedure 2: Tungsten carbide burs, Procedure 3: diamond burs, Procedure 4: Procedure 2 + one-step diamond micropolisher (PoGo), Procedure 5: Procedure 2 + multi-step discs (Super-snap), Procedure 6: Procedure 3 + one-step diamond micropolisher (PoGo), Procedure 7: Procedure 3 + multi-step discs (Super-snap). The obtained data were analyzed using two-way analysis of variance (ANOVA) and Duncan test at a p = 0.05 significance level. Results: Nanofilled composite showed significantly lower Ra values than microfilled composite in procedures 4, 6 and 7 (p 0.05). Conclusion: Nanofilled resin composite showed significantly lower Ra values than microfilled resin composite. Regardless of finishing methods, diamond micro-polisher produced smoother surfaces than polishing discs.

关键词： Surface Roughness Resin Composites One-Step Polishing