中红外双波长参量放大、唯象规律、表面电子加速、激光精密工程 | 本周物理讲座

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报告人：梁厚昆，四川大学

时间：7月19日（周二）10:00

单位：中国科学院物理研究所

地点：怀柔园区X1南楼101会议室

腾讯会议ID：272-623-358

会议密码：098765

摘要：

中红外多波段覆盖的少周期脉冲在光谱和时间整形方面具有良好的自由度，被广泛应用于控制强场电离、研究束缚电子动力学和微创组织消融等领域。然而，现有的脉冲相干的方法在频谱调谐方面缺乏自由度，且需要复杂的相位和噪声控制。我们报告一种简单和紧凑的方法产生中红外双波长少周期脉冲，实现了5.6到11.4μm的频谱调谐范围，且具有优良的光谱和时间整形和调谐的自由度。我们利用μJ量级脉冲能量、数百mW平均功率和周期量级脉冲宽度的中红外脉冲，在多晶ZnSe中操纵并调控了高次谐波的产生，实现了不同基频的多组谐波的同时产生，且可调谐单个谐波的相对强度和谐波的光谱形状。

报告人简介：

梁厚昆，新加坡南洋理工大学光电工程学士（2007年）、光电工程博士（2011年）。2011至2014年在新加坡制造科学研究院任副研究员，2014至2016年在麻省理工大学做博士后研究。2016至2019年新加坡制造科学研究院任研究员、项目PI。2019年11月获得第15批“国家高层次引进”（青年项目）资助，回国到四川大学任教授、博士生导师。长期从事中红外高能量超短脉冲激光器、中红外光学参量啁啾脉冲放大和非线性光学等专业的研究工作，主持多个中红外激光攻关项目，包括自然科学基金面上项目、四川省杰出青年科技项目、德国联邦教育和科研部与新加坡的联合项目、新加坡科学与工程研究委员会X射线光子项目。发表高档次论文50余篇。

2

报告人：Dr. Peter Amann，Scienta Omicron AB, Uppsala

时间：7月19日（周二）15:00

单位：国家同步辐射实验室

会议链接：

摘要：

Catalyst materials help transforming chemical species in an energy efficient way and therefore find applications in almost all sectors of the chemical industry. However, people still lack a detailed understanding of the underlying mechanisms of how the reactions proceed. Methanol is an important base chemical and receives strong interest as future energy carrier for energy storage. Catalysts consisting of Cu and Zn are used in reactors to form methanol from gas mixtures of CO, CO2 and H2. Despite substantial effort, the active state of Zn under reaction conditions is still under discussion. To shed light into the process of how molecular bonds are broken and new bonds are formed, the speaker will report on a state of APXPS setup capable of investigating catalyst materials under pressures of several 100 mbar and even reaching into the bar regime, being 10-100 times higher in pressure than other APXPS setups. The speaker will also discuss the instrument development and how to tackle some of the most challenging technical difficulties that arise with these types of instrumentation, including methanol synthesis over Zn/ZnO/Cu(211)catalyst and their related reaction mechanisms.

报告人简介：

Prof. Peter Amann holds a doctorate in physics from the University of Innsbruck, Austria and a degree in mechanical engineering from the Austrian chamber of commerce. During his postdoctoral fellowship, Peter Amann contributed to building up the research center for energy at the Vorarlberg University of Applied Sciences. He then became a researcher at University of Stockholm, where he led the development of high-pressure XPS and concentrated on the research of catalyst materials using synchrotron-based technologies. Currently Peter Amann is a product manager at Scienta Omicron being responsible for hard APXPS. He has published in Science, Angew, JACS, Nature Comm., ACS Catal. and contributed to the fields of magnetism, low-dimensional physics, surface science, instrument development, batteries, and catalysis.

3

报告人：陈征，北京交通大学

时间：7月19日（周二）19:00

单位：中国物理学会、北京师范大学科学教育研究院

会议链接：

摘要：

对中学物理中涉及的物理规律进行汇总，对其共性和在物理学理论框架中所处的位置和发挥的作用进行概述。

4

报告人：Caterina Riconda，Sorbonne University

时间：7月19日（周二）21:00

单位：Matter and Radiation at Extreme (MRE)

会议链接：

报告人简介：

C. Riconda obtained her PhD degree in 1996 from the Massachussetts Institute of Technology, USA, under the supervision of Prof. B. Coppi. A first post-doc at the Joint European Torus in the UK was followed by a TMR Marie Curie Fellowship at Ecole Polytechnique, FR. After holding a junior professor position at the University of Bordeaux, she is currently full professor at Sorbonne University at the Laboratoire d’Utilisation des Lasers Intenses (LULI) and group leader of the theory team TIPS. Her research interests are theory and kinetic simulations of laser-plasma interaction, non-linear wave-wave and wave-particle coupling in plasmas, surface electron acceleration, plasma optics, relativistic plasmas and strong field QED in plasmas.

5

报告人：Prof. Hong Minghui, National University of Singapore, Singapore

时间：7月20日(周三) 20:30

单位：天津大学Nanotechnology and Precision Engineering期刊

会议链接：

摘要：

Laser precision engineering in ambient air has unique advantages as a non-contact and high-speed process. It is a key advanced manufacturing approach for high quality micro/nano-structures’ fabrication. In the past decades, we have witnessed its extensive applications in research laboratories and production lines. Combined with some advanced processing tools, such as AFM and NSOM, laser precision engineering’s resolution can be pushed down to 10 ~ 25 nm, much smaller than Optical Diffraction Limit, which provides an excellent opportunity for the nano-manufacturing. In this talk, the physics behind laser-matter interactions will be reviewed. How to achieve small heat affected zone (HAZ) is one critical challenge for high quality laser precision engineering to push its resolution from micro-scale to nano-scale. The next critical challenge is how to ensure high enough nano-fabrication speed to meet industrial needs. Since one beam laser processing at high resolution could not achieve such mission, parallel laser beam processing is developed to cater for both high resolution and high speed at the same time. Another challenge is how to carry out the laser nano-structuring in far field as the near field processing requires the tiny optics working very close to sample surfaces, which makes the laser nanofabrication in near field be only suitable for very limited super-smooth surface samples. Our recent research shows that hybrid pulsed laser processing in far field and in ambient air is a novel method to make ~15 nm features directly on Si surfaces. With better understanding of the complicated physics behind this unique experimental result, as well as further fine tuning of our experimental setup and laser processing parameters, it is highly possible to bring our laser precision engineering resolution down to ~10 nm.

报告人简介：

Prof. Hong Minghui specializes in laser microprocessing & nanofabrication. He has co-authored 15 book chapters, 42 patents granted, and 500+ scientific papers in Nature, Chemical Reviews, Nature Nanotechnology, Advanced Materials, Advances in Optics and Photonics, Nano Letters, Light: Science and Applications, ACS Nano, Science Advances, Nature Communications, and Laser & Photonics Reviews etc. and 100+ plenary/keynote/invited talks in international conferences. He is a member of organizing committees for Laser Precision Micromachining International Conference (2001~2024), International Symposium of Functional Materials (2005, 2007 and 2014), Chair of International Workshop of Plasmonics and Applications in Nanotechnologies (2006), Chair of Conference on Laser Ablation (2009) and Chair of Asia-Pacific Near-field Optics Conference (2013 and 2019). Prof. Hong is invited to serve as an Editor of Light: Science and Applications, Engineering, Science China G, Laser Micro/nanoengineering, and Executive Editor-in-chief of Opto-Electronic Advances. Prof. Hong is Fellow of Academy of Engineering, Singapore (FSEng), Fellow of Optical Society of America (OSA), Fellow of International Society for Optics and Photonics (SPIE), Fellow of International Academy of Photonics and Laser Engineering (IAPLE) and Fellow of Institution of Engineers, Singapore (IES). Prof. Hong is currently a Full Professor and the Director of Advanced Research and Technology Innovation Centre (ARTIC), Director of Optical Science and Engineering Centre (OSEC) in the National University of Singapore. He is also a founder of Phaos Technology Pte. Ltd. and Opto Science Pte. Ltd.

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报告人：朱平安，香港城市大学机械工程系

时间：7月22日(周五) 14:00

单位：中国力学学会流体力学专业委员会微纳尺度流动专业组

会议链接：

摘要：

本报告将从微通道内多相流界面流动机理和操控、基于微流控技术的固体表面特性调控、开放空间表面流体流动机理和操纵三方面系统介绍微流控软制造技术的原理、过程和应用，展示流体力学与先进制造领域的交叉创新。

报告人简介：

朱平安，博士，香港城市大学机械工程系助理教授，主要从事微纳尺度界面和流动研究，曾获中国新锐科技人物突出成就奖，TechConnect全球创新奖，香港青年科学家奖提名等荣誉和奖项。

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报告人：穆恺，中国科学技术大学近代力学系

时间：7月22日(周五) 15:00

单位：中国力学学会流体力学专业委员会微纳尺度流动专业组

会议链接：

摘要：

利用射流破碎可制备多种材料和功能的微液滴及胶囊。报告将结合实验、数值模拟和理论分析，探究射流演化过程中的界面流动规律，从流体力学角度揭示其不稳定性机理。通过对射流破碎进行外部控制，实现了可控粒径与几何结构微液滴的制备。

报告人简介：

穆恺，中国科学技术大学近代力学系副研究员。研究方向包括微纳尺度流动、表界面流体力学、界面不稳定性等。主持基金委青年项目和军科委项目等课题，在流体力学及其交叉应用领域发表学术论文20余篇。

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报告人：Dr. Miaoyuan Liu

时间：7月22日（周五）19:00

单位：上海交通大学物理与天文学院 李政道研究所 北京大学物理学院 高能物理研究中心

会议链接：

摘要：

Searches for new physics beyond the Standard Model at the Large Hadron Collider (LHC) require paradigm shifts in search strategies and advanced instrumentation. To harness the Proton-Proton collisions at the highest energy of unprecedented rate, innovative approaches must be explored and recent development in artificial intelligence (AI) offers such opportunities. In my talk, I will introduce essential elements in boosting the discovery potential with accelerated AI: science drivers at the LHC, interplay between Machine Learning (ML) and domain knowledge, as well as ML-specific compute systems. I will highlight a few studies in ML algorithms, in collaboration with experts in Purdue CS, that enable important science topics at the LHC. I will also discuss the challenges of realizing ML in scientific instruments and solutions explored in my previous work. At the end of my talk, I will introduce the multidisciplinary NSF A3D3 (accelerated AI algorithms for data driven discovery) HDR institution and how these explorations can benefit science domains broadly.

报告人简介：

Dr. Miaoyuan Liu completed her PhD at Duke University in 2015, her thesis work is on establishing the first evidence of triboson processes with W boson produced associated with two photons using ATLAS data. As a postdoc at Fermilab from 2015 to 2020, she performed searches for three heavy gauge bosons events that led to the first observation of the VVV process and evidences of WWW/WWZ with CMS 13 TeV proton collision data collected during LHC Run-2 operation. she also searched for SUSY particles such stop Pairs and electroweakinos using CMS early Run-2 data. She led the commissioning and testing of the CMS phase 1 forward pixel detector pre/post installation at Fermilab and is continuing to contribute to the cms phase 2 outer tracker upgrade as an assistant professor at Purdue University starting in 2020. Her recent work focuses on improving CMS physics sensitivities with machine learning and heterogeneous computing hardwares.

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