Femtosecond radiative decay of coupled excitons by radiation-induced interaction in ZnO thin films

摘要

We investigated ultrafast optical response of coupled excitons in ZnO thin films by transientgrating method. Femtosecond radiative decay via radiation-induced interaction between Aand B excitons along with nonlocal interaction between light and exciton was observed in thefilm with mesoscopic thickness between nanometers and micrometers.