Prof. Clemens Burda, Case Western Reserve University

The Contribution of Femtosecond Laser Spectroscopy to the Development of Advanced Optoelectronic Nanomaterials

Physical Chemistry Seminar Series

Femtosecond laser spectroscopy has now been for over a decade a powerful technique to investigate charge carrier dynamics in nanoscale optoelectronic systems with a temporal resolution of hundreds of femtoseconds or better. Both, transient absorption and time-resolved photoluminescence spectroscopy are popular spectroscopic techniques, which are well-established and provide direct insight into the charge carrier dynamics of nanomaterials. In this talk, I plan to focus mainly on the developments with regards to studies of semiconductor nanostructures and nanoparticle-conjugates. Controlling the charge carrier dynamics, including hot carrier relaxation, trapping, interfacial carrier transfer, and recombination is essential for successful energy conversion at the nanoscale. I will show how femtosecond laser spectroscopy evolved into techniques that unveil the dynamic charge carrier properties of nanomaterials interfaces, heterostructures and more complex functional nanoarchitectures and that femtosecond time-resolved laser spectroscopy can illuminate the way to design novel optoelectronic devices and emergent opto-electronic technologies.

For more information contact Prof. Mostafa El-Sayed (404-894-0292).