ZnO tetrapod nanowires were fabricated by evaporation of Zn in a N2gas flow. Stimulated emission with a threshold of ∼ 100 μJ cm-2was observed and the linewidths of individual modes were in the range 0.7-0.9 nm. Time-resolved measurements have been performed at different excitation powers. With an increase of the pump power, the transition from exciton stimulated emission to the electron-hole plasma regime can be clearly observed. Both electron-hole plasma and exciton emission have decay times under 10 ps.
ASJC Scopus subject areas
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering
- Electrical and Electronic Engineering