Theme: Nanoplasmonics & Nanophotonics for Sensing

Time：2:30-5:00pm, December 17, 2021

Tencent VooV Meeting ID：652-899-267；Password：211217

Online meeting Link：https://meeting.tencent.com/dm/H9KJ3IeDPsGV

Lecturer：AP. Lin WU，Singapore University of Technology and Design        

Introduction of the Lecturer：

Associate Professor WU Lin received a B.Eng. degree with 1st class Honour (2005) and a Ph.D. degree (2009) from Electrical and Electronic Engineering Nanyang Technological University, Singapore. From 2009 to 2021, she worked in the Institute of High Performance Computing A*STAR as a computational scientist. In Nov 2021, she joined the Singapore University of Technology and Design, Science, Mathematics and Technology cluster as an associate professor. Her research interests include theory and modeling in nanophotonics and nanoplasmonics, emphasizing quantum technology and sensing applications. She has authored or co-authored two book chapters and ~60 refereed journal papers, including Optics Express (cited 730 times), ACS Nano, Science, Nature Communications, Nature Photonics, Advances in Optics and Photonics, Advanced Optical Materials, and Nano Letters. She also holds three United States patents.

Abstract：

Optical sensors are widely used for refractive index measurement in chemical, biomedical, and food processing industries. Due to the specific field distribution of the resonances, optical sensors provide high sensitivity to ambient refractive index variations. The sensitivity of an optical sensor is highly dependent on the material and structure of the sensor. In this talk, I will introduce six major categories of optical refractive index sensors using plasmonic and photonic structures: i) metal-based propagating plasmonic eigenwave structures, ii) metal-based localized plasmonic eigenmode structures, iii) dielectric-based propagating photonic eigenwave structures, iv) dielectric-based localized photonic eigenmode structures, v) advanced hybrid structures, and vi) 2D material integrated structures. Representative configurations working in the 400–2000 nm wavelength range will be selected and compared in bulk refractive index sensitivities, figures of merit, and working wavelengths. A technology map will be presented to define the standard and development trend for optical refractive index sensors. Beyond refractive index sensing, these sensor configurations have also been applied in many other areas, including biosensing, chemical sensing, pH sensing, temperature sensing, strain sensing, and environmental sensing. I will showcase nanoplasmonic immunoassay sensors and the environmental sensing towards detecting sub-100-nm ultrafine particulate matter, i.e., PM0.1!   

Source: School of Information Engineering