Exciton Photophysics

We investigate unique physical properties of low-dimensional materials such as carbon nanotubes and two-dimensional semiconductors. Our research focuses on understanding exciton-phonon interactions, exciton dynamics, and interlayer coupling effects. We explore novel optical phenomena including upconversion luminescence through selective excitation of bright excitons in carbon nanotubes, with a view toward the potential realization of laser cooling. We also study efficient energy transfer in two-dimensional heterostructures, photocarrier relaxation processes, and photodetection and carrier dynamics in 2D devices. Our goal is to translate these fundamental insights into applications for next-generation optical devices and quantum technologies.