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ultra-short Pulsed Laser Manufacturing and Surface Processing of Microdevices

Engineering 2018年第6期4卷 779-786页

作者： Yongchao Yu Shi Bai Shutong Wang Anming Hu Department of Mechanical Aerospace and Biomedical EngineeringUniversity of TennesseeKnoxvilleTN 37996USA Institute of Laser Engineering Beijing University of TechnologyBeijing 100124China College of Electronics and Information Engineering Sichuan UniversityChengdu 610064China

ultra-short laser pulses possess many advantages for materials *** laser has a significantly low thermal effect on the areas surrounding the focal point;therefore,it is a promising tool for micro-and submicro-sized precision *** addition,the nonlinear multiphoton absorption phenomenon of focused ultra-short pulses provides a promising method for the fabrication of various structures on transparent material,such as glass and transparent polymers.A laser direct writing process was applied in the fabrication of high-performance three-dimensional(3D)structured multilayer microsupercapacitors(MSCs)on polymer substrates exhibiting a peak specific capacitance of 42.6 mF·cm^-2 at a current density of 0.1 mA·cm^-***,a flexible smart sensor array on a polymer substrate was fabricated for multi-flavor *** surface treatments such as gold plating,reducedgraphene oxide(rGO)coating,and polyaniline(PANI)coating were accomplished for different measurement *** applying principal component analysis(PCA),this sensing system showed a promising result for flavor *** addition,two-dimensional(2D)periodic metal nanostructures inside 3D glass microfluidic channels were developed by all-femtosecond-laser processing for real-time surfaceenhanced Raman spectroscopy(SERS).The processing mechanisms included laser ablation,laser reduction,and laser-induced surface *** works demonstrate the attractive potential of ultra-short pulsed laser for surface precision manufacturing.

关键词： ultra-short pulsed laser processing Microdevices Supercapacitor Electronic tongue Surface-enhanced Raman spectroscopy

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Review on TNSA diagnostics and recent developments at SPARC LAB

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High Power Laser Science and Engineering 2019年第3期7卷 228-239页

作者： Fabrizio Bisesto Mario Galletti Maria Pia Anania Massimo Ferraro Riccardo Pompili Mordechai Botton Elad Schleifer Arie Zigler INFN-LNF Via Enrico Fermi 4000044 FrascatiItaly Central Laser Facility Science and Technology Facilities CouncilRutherford Appleton LaboratoryHarwell Science and Innovation CampusDidcot 0X11 OQXUK GoLP Instituto de Plasmas e Fusao Nuclear Instituto Superior TecnicoUniversidade de LisboaAv.Rovisco Pais 1049-001 LisbonPortugal Racah Institute of Physics Hebrew University91904 JerusalemIsrael

Interaction between high-intensity lasers with solid targets is the key process in a wide range of novel laser-based particle accelerator schemes,as well as electromagnetic radiation *** to all the processes is the generation of femtosecond pulses of relativistic electrons emitted from the targets as forerunners of the later-time principal products of the interaction *** this paper,some diagnostics employed in laser–solid matter interaction experiments related to electrons,protons,ions,electromagnetic pulses(EMPs)and X-rays are ***,we present our experimental study regarding fast electrons and EMPs utilizing a femtosecond-resolution detector previously adopted only in accelerator facilities.

关键词： high power laser laser-plasma interaction pulsed electric field diagnostic ultra-short high-intensity laser pulses

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3D UTE定量评估骨皮质结合水和自由水的实验研究

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中国医学计算机成像杂志 2015年第6期21卷 591-595页

作者：李仕红叶春涛左盼莉傅彩霞严序滑炎卿嵇鸣林光武复旦大学附属华东医院放射科西门子公司医疗卫生事业部西门子(深圳)磁共振有限公司

目的:本研究尝试采用3D UTE成像及双指数T2*衰减模型分离骨皮质结合水和自由水。方法:在3T Skyra下对6例成年牛胫骨中段标本进行3D UTE成像,构建UTE双指数T2*衰减模型,对6例牛骨样本不同回波时间的UTE图像进行拟合,分别得到双指数拟合... 详细信息

目的:本研究尝试采用3D UTE成像及双指数T2*衰减模型分离骨皮质结合水和自由水。方法:在3T Skyra下对6例成年牛胫骨中段标本进行3D UTE成像,构建UTE双指数T2*衰减模型,对6例牛骨样本不同回波时间的UTE图像进行拟合,分别得到双指数拟合结果。结果:6例样本双指数拟合后,结合水(短)T2*=0.30ms,占比约81.6%,自由水(长)T2*=2.74ms,占比约18.4%。结论:3D UTE双指数衰减模型是一个有效的分离骨皮质结合水和自由水的方法,为定量评估骨质量提供了新的生物学指标,其对骨皮质结合水和自由水的分离有助于骨的力学性质的推断。

关键词： 3D ultra-short echo time imaging 骨皮质结合水自由水双指数拟合

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