Ioannis (John) KYMISSIS
Professor & Electrical Engineering Department Chair of Columbia University, USA

Ioannis Kymissis joined the Electrical Engineering faculty in 2006. He teaches courses in solid state devices and display technology. He obtained his SB, MEng and PhD degrees from MIT, and also participated in a cooperative program through which he completed his M.Eng. thesis at IBM Research. He also held a postdoctoral appointment at MIT and worked as a consulting engineer at QDVision before joining Columbia.

Prof. Kymissis's research focuses on the fabrication, characterization, and applications of thin film electronics, with a particular focus in the applications of organic semiconductors and recrystallized silicon devices. In addition to his teaching and research work, he also serves as the Editor-in-Chief of the Journal of the Society for Information Display.

Topic: MicroLED and OLED devices For Biomedical Optics

Abtract: The development of high efficiency solid state light sources has revolutionized the availability of light sources for biomedical systems. The ability to place optical elements such as emitters and detectors directly in contact with the tissue being interrogated and the availability of high efficiency light sources which can be placed into wearable devices significantly improves the quality of optical measurements taken in practical systems. The extraordinary intensity available from inorganic LEDs also unlocks new capabilities in optogenetic and spectroscopic measurements. When combined with thin film electronics and non-traditional substrates (including transparent and flexible materials) the variety and versatility of available systems for sensing systems is significantly expanded.

Our group has been working on the hybrid integration of organic semiconductors, microLEDs and thin film electronics for a variety of biomedical measurement applications. In this presentation, I'll show how thin film electronics and the hybrid integration enabled by new semiconductor systems and process options allows for active and spatially localized control of systems that are typically used in a single element format. Systems we will discuss include micro-LED microdisplay systems used for displays and biomedical applications, monitors for measurement of epilepsy using optical monitoring, analysis of blood flow and healing post-surgery, and the progress of diseases such as lupus and arthritis.  The availability of these devices and approaches unlock new applications in healthcare, sensing, displays, soft and highly instrumented robotics, transportation, and communications.