Abstract: Silicon Photonic Devices for Chip-Integrated Sensing and Spectroscopy

Silicon chip integrated photonic devices hold tremendous promise to make significant inroads into the field of chemical and biological sensing in healthcare and environmental pollution monitoring. However, the technology faces challenges from fabrication imperfections in foundry fabricated devices as a result of variation in waveguide dimensions. In this talk, we describe our work in chem-bio sensing, on-chip spectroscopy with silicon photonic nanostructures to reach the theoretical limits of detection, and methods to overcome various challenges in on-chip sensing and spectroscopy.

Bio:

Swapnajit Chakravarty is an Associate Professor in the Department of Electro-Optics and Photonics at the University of Dayton. Prior to joining UD in 2021, Dr Chakravarty worked as a Principal Research Scientist at IMEC. Dr Chakravarty's research in industry and academia has been on novel nanophotonic active light emitters and passive waveguides and resonators in the near-infrared and mid-infrared for applications in chem-bio sensing, on-chip spectroscopy, optical beam steering as well as in optical modulators for high speed computing and communications. Dr Chakravarty has a PhD in Electrical Engineering from the University of Michigan, Ann Arbor, MS in Electrical Engineering from the University of Cincinnati, OH, and a Bachelors in Electrical Engineering from Jadavpur University, Kolkata, India. Dr Chakravarty has over 150 papers in peer-reviewed journals and conferences and 12 issued patents. Dr Chakravarty is a Senior Member of SPIE, IEEE and Optica.