直播时间：2023年7月7日（周五）20:00-21:30

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北京时间2023年7月7日晚八点，iCANX Talks 第151期邀请到波士顿大学Abdoulaye Ndao教授分享在首个拓扑光源方面取得的最新突破，俄亥俄州立大学Abraham Badu-Tawiah教授展示最近的质谱实验！更多精彩，敬请期待！

【嘉宾介绍】

Abdoulaye Ndao

Boston University

Symmetry and topology in photonic nanostructures

【Abstract】

The quest for smaller, lighter, and more efficient optical components usually comes at the price of reduced functionalities. In this talk, I will provide an overview of how topological approaches to control light-matter interaction enable novel photonic devices with unique features and enhanced performance. I will discuss our recent breakthrough in demonstrating the first topological light source that unidirectionally outcouples to a waveguide from magnetic biased photonic crystal cavities of arbitrary shape. I will also discuss singularities of non -Hermitian systems and their application in biology and healthcare by detecting attomolar concentrations of anti-immunoglobulin G. In the last part of the talk, I will present a premier achromatic broadband metalens that is strategically engineered to span an octave bandwidth with high efficiency. Such devices will be suitable for free space and integrated optics and pave the way towards more complex and versatile systems with applications in high-capacity classical and quantum communications, as well as sensing.

光学元件通常要牺牲某些功能才能变得更小、更轻、更高效。本报告将概述拓扑方法如何控制光-物质相互作用，从而赋予光子器件独特特性并增强其性能。本报告将讨论我们在首个拓扑光源方面取得的最新突破，该光源可以从任意形状的磁偏光子晶体腔中向波导进行单向耦合。本报告还将通过检测抗免疫球蛋白G的原子摩尔浓度来讨论非厄米系统的奇异点及其在生物学和医疗保健中的应用。本报告最后将介绍一种精心设计的、可以快速跨越一个八度频宽的消色差宽带金属透镜。这种器件适用于自由空间和集成光学，为在高容量经典通信、量子通信以及传感方面应用更复杂、更多样的系统奠定了基础。

【BIOGRAPHY】

Professor Abdoulaye Ndao is an Assistant Professor of Electrical and Computer Engineering at Boston University. He was subsequently a postdoctoral researcher at UC San Diego and UC Berkeley. He received his Master and Ph.D. degrees in physics from the University of Franche Comte (France). Dr. Ndao is a recipient of ten prestigious awards, including Sculpted Light in the Brain Innovation award, Boston University Outstanding Faculty Committee Service Award, Reidy Family Career Development Professorship. “the very best young researcher at Boston University, top ten 2021 Rising Stars of Light, top ten breakthrough by physics world, Triton Innovation Challenge grand prize winner for Lidar applications, Prize winner of Institute for the Global Entrepreneur at UC San Diego to name a few. His research interests span wide-ranging topics in photonics, material sciences, and physics.

Abdoulaye Ndao教授，波士顿大学电气与计算机工程系助理教授。于法国弗朗什孔泰大学获得物理学硕士和博士学位，曾任加利福尼亚大学圣迭戈分校、加利福尼亚大学伯克利分校博士后研究员。曾获大脑中的雕刻光创新奖、波士顿大学杰出教师委员会服务奖、Reidy家族职业发展教授奖、波士顿大学最佳青年研究员、2021年光学界十大新星、物理界十大突破、Triton创新挑战奖（应用于激光雷达）、加利福尼亚大学圣迭戈分校全球企业家协会奖等奖项。主要研究领域为光子学、材料科学和物理学。

Abraham Badu-Tawiah

Ohio State University

Technology for the Underserved: A Chemical Signal Amplification Strategy for Asymptomatic Malaria Detection

【Abstract】

The presentation is intended to demonstrate recent mass spectrometry experiments designed to facilitate chemical analysis in resource-limited settings. In our approach, we combine new levels of simplicity, modest cost, and a centralized detection strategy for accurate disease detection. I will focus on technological advancements that enable portable mass spectrometers to be used as a signal transduction strategy for immunoassay platforms performed on ordinary paper substrates. Because of its high sensitivity, we can use this technology for asymptomatic malaria detection, where parasite density is very low.

本报告旨在展示最近的质谱实验，旨在促进资源有限环境下的化学分析。在我们的方法中，我们结合了新的简单程度、适度的成本和集中的检测策略，以实现准确的疾病检测。我将重点介绍使便携式质谱仪能够用作在普通纸基板上执行的免疫分析平台的信号传导策略的技术进步。由于它的高灵敏度，我们可以将这项技术用于寄生虫密度非常低的无症状疟疾检测。

【BIOGRAPHY】

Abraham Badu-Tawiah obtained his PhD (2012) in Chemistry from Purdue University under the supervision of Prof. Graham Cooks. From 2012 to 2014, he was a postdoctoral fellow at Harvard University under the direction of Prof. George Whitesides. He joined The Ohio State University, Department of Chemistry and Biochemistry in July 2014 as an Assistant Professor. In June 2020, Dr. Badu-Tawiah was promoted to Associate Professor with tenure and in 2022 he was promoted again to the rank of Full Professor. He is currently the Fox Professor of Chemistry with appointments in the department of internal medicine and the department of microbial infection and immunity. Dr. Badu-Tawiah is a recipient of 2021 Ohio State Early Career Innovator of the Year, 2020 Sloan Fellowship Award, 2019 NIH MIRA for New Investigators Award, 2018 ACS Division of Analytical Chemistry Arthur F. Findeis Award, 2017 Eli Lilly Young Investigator Award in Analytical Chemistry, 2017 American Society for Mass Spectrometry Research Award, and 2016 Department of Energy Early Career Award. His current research is focused on the development of new mass spectrometry techniques for disease detection, and the studies of novel ion chemistry in charged micro-droplets.

Abraham Badu-Tawiah, 2012年毕业于普渡大学化学专业，导师为Graham Cooks教授。2012年至2014年在哈佛大学任博士后，师从George Whitesides教授。他于2014年7月加入俄亥俄州立大学化学与生物化学系，担任助理教授。2020年6月，Badu-Tawiah博士晋升为终身副教授，并于2022年再次晋升为正教授。他目前是福克斯化学教授，在内科和微生物感染与免疫部门任职。Badu-Tawiah博士是2021年俄亥俄州立大学年度早期职业创新者、2020年斯隆奖学金奖、2019年NIH MIRA新研究员奖、2018年ACS分析化学Arthur F. Findeis奖、2017年Eli Lilly分析化学青年研究员奖、2017年美国质谱研究学会奖和2016年能源部早期职业奖的获得者。他目前的研究重点是开发用于疾病检测的新型质谱技术，以及带电微液滴中新型离子化学的研究。