Journal of Laser Micro Nanoengineering最新文献_第5页

Automatic Image Analysis for Processing Marks in Femtosecond Laser Micromachining Using Concave and Convex (unevenness) Coefficien 基于凹凸（不均匀）系数的飞秒激光微细加工标记自动图像分析

IF 1.1 4区材料科学

Journal of Laser Micro Nanoengineering Pub Date : 2022-07-01 DOI: 10.2961/jlmn.2022.01.2003

引用次数: 0

High Pore Density Polyimide Membrane Production by PS Laser Pulses PS激光脉冲制备高孔密度聚酰亚胺膜

IF 1.1 4区材料科学

Journal of Laser Micro Nanoengineering Pub Date : 2022-07-01 DOI: 10.2961/jlmn.2022.01.2002

引用次数: 1

Beam Shaping for Uniform and Energy-efficient Surface Structuring of Metals with Ultrashort Laser Pulses in the mJ Range 用mJ范围的超短激光脉冲对金属表面结构进行均匀高能整形

IF 1.1 4区材料科学

Journal of Laser Micro Nanoengineering Pub Date : 2022-07-01 DOI: 10.2961/jlmn.2022.01.2006

Daniel Holder, Simon Hensel, Alexander Peter, R. Weber, T. Graf

{"title":"Beam Shaping for Uniform and Energy-efficient Surface Structuring of Metals with Ultrashort Laser Pulses in the mJ Range","authors":"Daniel Holder, Simon Hensel, Alexander Peter, R. Weber, T. Graf","doi":"10.2961/jlmn.2022.01.2006","DOIUrl":"https://doi.org/10.2961/jlmn.2022.01.2006","url":null,"abstract":"Scaling the average power of ultrafast lasers into the kW range for high-throughput surface structuring and micromachining by the pulse energy requires an adapted processing strategy in order to minimize surface defects due to high fluences and maintain a high surface quality. One promising approach to distribute the pulse energy uniformly on the sample surface is spatial beam shaping using a spatial light modulator. The local phase was modulated by computer-generated holograms for the generation of uniform intensity distributions in the focal plane. The corresponding intensity distributions resulting from the different holograms were monitored with an on-axis camera to ensure accurate beam shapes during surface structuring and micromachining of the two materials stainless steel and cemented tungsten carbide. Uniform surface structures and flexible, dimensionally accurate cavities were machined with a shaped ultrafast laser beam and high pulse energies up to over 1 mJ on the sample surface. Various beam shapes with a cross-sectional area up to 0.42 mm² were generated on the sample surface for energy-efficient micromachining and homogenous surface structuring. The capability of high-energy pulse beam shaping was demonstrated by the fabrication of a large-area checkerboard pattern with small transition zones <10 µm between unprocessed and structured areas.","PeriodicalId":54788,"journal":{"name":"Journal of Laser Micro Nanoengineering","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44938929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Raman Studies of Structural Changes in Diamond-like Carbon Films on Si Induced by Ultrafast Laser Ablation 硅表面类金刚石薄膜结构变化的拉曼光谱研究

IF 1.1 4区材料科学

Journal of Laser Micro Nanoengineering Pub Date : 2022-07-01 DOI: 10.2961/jlmn.2022.01.2001

Keisuke Takabayashi, Khaidir Bin Khamaron, T. Tomita, Takashi Takahashi, Y. Kobayashi, M. Yamaguchi

{"title":"Raman Studies of Structural Changes in Diamond-like Carbon Films on Si Induced by Ultrafast Laser Ablation","authors":"Keisuke Takabayashi, Khaidir Bin Khamaron, T. Tomita, Takashi Takahashi, Y. Kobayashi, M. Yamaguchi","doi":"10.2961/jlmn.2022.01.2001","DOIUrl":"https://doi.org/10.2961/jlmn.2022.01.2001","url":null,"abstract":"In this study, the diamond-like carbon (DLC), a tetrahedral amorphous carbon sample deposited on Si, was irradiated using a picosecond laser. We evaluated the picosecond-laser-induced structural and morphological changes in DLC using micro-Raman spectroscopy via line measurements. We obtained the spatial distribution of the structure and morphology of DLC on Si by regression analysis of the Raman spectra. The photo-induced crater could be categorized into four regions: peripheral, morphological-change, structural-changes, and ablated regions. The structure and morphology of the peripheral region were similar to those of the as-received DLC. In the morphological-change region, which is inside the periphery region, the thickness of the DLC decreased without any structural changes. At the center of the crater, which is shown in black in the optical image, two regions were identified by Raman spectroscopy. On the outer side, there is a structural-change region where the graphitization of DLC materialized with a reduction in the film thickness. Inside the structural-change region, there is an ablated region where the DLC was degraded by laser ablation.","PeriodicalId":54788,"journal":{"name":"Journal of Laser Micro Nanoengineering","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46004490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

In Situ Analysis of Ultrashort Pulse Burst Ablation via Transmission Pump Probe Imaging 利用传输泵探头成像原位分析超短脉冲爆发烧蚀

IF 1.1 4区材料科学

Journal of Laser Micro Nanoengineering Pub Date : 2022-07-01 DOI: 10.2961/jlmn.2022.01.2004

引用次数: 0

Beam Shaping the Direct Laser Interference Patterning Spot 直接激光干涉图案点的光束整形

IF 1.1 4区材料科学

Journal of Laser Micro Nanoengineering Pub Date : 2022-07-01 DOI: 10.2961/jlmn.2022.01.2007

L. Pongratz, K. Vannahme

{"title":"Beam Shaping the Direct Laser Interference Patterning Spot","authors":"L. Pongratz, K. Vannahme","doi":"10.2961/jlmn.2022.01.2007","DOIUrl":"https://doi.org/10.2961/jlmn.2022.01.2007","url":null,"abstract":"Direct Laser Interference Patterning (DLIP) using ultrashort pulsed laser sources is a single-step process to produce micro- and nanostructured surfaces by ablation. Spatial periods of a few micrometers are patterned using a laser scanner system with two interfering beams. In this study, the field of DLIP processing is expanded by handling spatial periods in the range of 1 µm and below. Precise periodic ablation is achieved with an optical setup tailored for a homogenous topography of spatial periods in the micro and sub-micrometer range. The lateral intensity distribution of the interference area used for ablation is shaped using beam shapers in order to achieve a homogenous intensity distribution and hence increase the homogeneity of the periodic texture in the ablated area. The shape of the interference area is formed into a square profile for the purpose of seamless stitching plenty of to be processed areas. This creates large area periodic textures with high homogeneity. Two beams with ultrashort laser pulses of 10 ps duration and a wavelength of 532 nm are used to structure line-like periodic surface textures with spatial periods of 650 nm. The beam shaping elements modify the lateral intensity distribution in the interference area and the affiliated profile. This enables precise patterning of tool steels with spatial periods in sub-micrometer range for applications in the field of life science surfaces.","PeriodicalId":54788,"journal":{"name":"Journal of Laser Micro Nanoengineering","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43854457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ultrahigh Precision Machining of Polymer Surface using Laser-Induced Reactive Micro-Plasmas 激光诱导反应微等离子体对聚合物表面的超高精度加工

IF 1.1 4区材料科学

Journal of Laser Micro Nanoengineering Pub Date : 2022-07-01 DOI: 10.2961/jlmn.2022.01.2005

引用次数: 1

Super Hydrophilic Surface Fabricated on Alumina Ceramic by Ultra-fast Laser Microprocessing 超快激光微加工制备氧化铝陶瓷超亲水性表面

IF 1.1 4区材料科学

Journal of Laser Micro Nanoengineering Pub Date : 2021-12-01 DOI: 10.2961/jlmn.2021.03.2005

引用次数: 0

Influence of the Laser Beam Shape on Laser-Induced Periodic Surface Structure Formation Assisted by Surface Plasmon Polariton 激光束形状对表面等离子体偏振子辅助激光诱导周期性表面结构形成的影响

IF 1.1 4区材料科学

Journal of Laser Micro Nanoengineering Pub Date : 2021-12-01 DOI: 10.2961/jlmn.2021.03.2009

引用次数: 0

Process Monitoring in Absorber-Free Laser Transmission Welding of Plastics by Using Deep Learning Algorithms 基于深度学习算法的塑料无吸收剂激光传输焊接过程监控

IF 1.1 4区材料科学

Journal of Laser Micro Nanoengineering Pub Date : 2021-12-01 DOI: 10.2961/jlmn.2021.03.2003

引用次数: 3