Paper 14100-81
Paper 14100-81
Integrated plasmonic chemical and biological sensors based on optical waveguides and plasmonic nanostructures on silicon and silicon nitride platforms
14 April 2026 • 18:10 - 20:00 CEST | Galerie Erasme (Niveau/Level 0)
Abstract
In this work, we describe the design and modeling of integrated plasmonic chemical and biological sensors based on integrating optical waveguides and plasmonic nanostructures on silicon and silicon nitride platforms. Different architectures of the waveguides are investigated that allow maximum coupling of the guided modes in the waveguides to evanescently interact with the plasmonic nanostructures and excite localized surface plasmon resonances (LSPRs) in these nanostructures. The sensing regions in these sensor chips contain plasmonic structures and are integrated with the on-chip optical waveguides that carry the light to and from the sensing regions such that the transduction - in the light signal due to the change in refractive index of the surrounding medium due to a change in chemicals or due to the presence of the analyte molecules - can be detected.
Presenter
Indian Institute of Technology Delhi (India)
Prof. Anuj Dhawan leads the Nanophotonics and Plasmonics Laboratory (NPPL) in the Electrical Engineering Department at IIT Delhi. Prof. Dhawan's research interests include Plasmonic and Nanophotonic Devices, SPR and SERS based Chemical and Biological Sensors, Flexible Electronic and Photonic Devices, Integrated Photonic Devices, Integrated nano-scale systems, Nanofabrication, and Computational Electromagnetics. Prof. Dhawan has authored over 150 publications (including ~ 90 publications in journals of repute) and filed several US and Indian patents. Before joining IIT Delhi, he worked as a National Research Council (NRC) Research Associate in the Electronics Division of the U. S. Army Research Office (ARO), Durham, NC, USA from 2007-2009 and as a Research Scientist in the Fitzpatrick Institute for Photonics at Duke University, NC, USA from 2009-2011. Dr. Anuj Dhawan received his B.Tech. degree from IIT Delhi and his Ph.D. and M.S. degrees from NC State University, Raleigh, NC, USA.