Come enjoy free coffee and cookies when you join us for our Physics Colloquium series:

Materials and device architectures aimed for high-performance continuous-wave organic semiconductor lasers

with A.M. Chathuranganie Senevirathne (University of Vermont)

Abstract: Organic semiconductor lasers are found to be very promising due to their wavelength tunability, flexibility, and ease of fabrication, making them suitable for a wide range of applications in everyday life. Continuous-wave (CW) organic semiconductor lasers, in particular, are favored for use in communications, sensing, and spectroscopy. However, CW lasing in organic semiconductors faces significant challenges due to optical losses from accumulated triplet-excitons, singlet-exciton quenching due to singlet-triplet annihilation, and thermal degradation under prolonged pulse excitation. This talk will explore recent advancements in strategies to manage thermal degradation and suppress optical and exciton losses, particularly those caused by triplet excitons, to achieve extended operational lasing pulse durations.

Biography: A.M. Chathuranganie Senevirathne currently serves as a postdoctoral associate at the Department of Physics, University of Vermont. She obtained her B.Sc. and M.Phil. degrees at the University of Peradeniya, Sri Lanka, and her doctorate at the Department of Applied Chemistry, Kyushu University, Japan. Following the completion of her Ph.D. studies, she joined KOALA Tech Inc. as a device engineer and later as a postdoctoral fellow at the International Institute for Carbon-Neutral Energy Research (I2CNER), Kyushu University, Japan. Her research interests include organic lasers, organic light-emitting diodes (OLEDs), and perovskite solar cells.