【理学院】理学论坛第134次学术活动通知

报告题目：Optical-trapping and optofluidics with plasmonic resonance induced effects in random metallic nano-islands

报告人：何浩培教授

报告人单位：香港中文大学

时间：2018年05月21日（周一）15:00

地点：仙林校区教2-314

主办单位：理学院，科研院

报告内容：We experimentally demonstrate several useful applications of random gold plasmonic nano-islands in optofluidics, including (i) optical trapping and assembling of particles and live cells into highly organized pattern with low power density and (ii) optically actuated microfluidic flow guiding and valves. The observed trapping effect is attributed to optical forces from localized surface plasmons combined with thermal convection that pushes the target objects into the trapping zone. It was found that thermophoresis plays a critical role in the system. More recently we reported trapping in pure resistive-heating, i.e. photon-free, devices. Our work provides a simple platform for on-chip optical manipulation of nanoand micro-sized objects, and may find applications in physical and life sciences.

报告人简介：Aaron Ho-Pui Ho received his BEng and PhD in Electrical and Electronic Engineering from the University of Nottingham in 1986 and 1990 respectively. Currently a professor in the Department of Biomedical Engineering, The Chinese University of Hong Kong. Started as a compound semiconductor materials scientist, his current academic interests focus on nano-sized semiconductor materials for photonic and sensor applications, optical instrumentation, surface plasmon resonance biosensors, lab-on-a-chip and biophotonics. He has published over 300 peer-reviewed articles, 16 Chinese and 6 US patents. He is a Fellow of SPIE.