infrared millimeter terahertz waves scientific conferences

Owing to their tunable features from 1m to 200m, HgTe nanocrystals are very attractive for THz technology. However, their absorption properties in the full THz range remains elusive and the carrier dynamics in THz HgTe nanocrystals are still unexplored. We report significant absorption from 0.5THz to 3THz in large HgTe nanocrystals. Furthermore, using optical pump-THz-probe measurements, we demonstrate picosecond relaxation times of nonequilibrium carriers in THz HgTe nanocrystals at room temperature. Our study provides fundamental insight on the nature of the involved transitions and also reveals the great potential of HgTe nanocrystals for the development of THz sources and photodetectors.