Picosecond Carrier Dynamics In THz HgTe Nanocrystals
Fri, 13 Nov 2020 03:45pm to 04:00pm
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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.
Presenters and Authors Info
Apretna, Thibault; Massabeau, Sylvain; Goubet, Nicolas; Gréboval, Charlie; Dhillon, Sukhdeep; Lhuillier, Emmanuel; Mangeney, Juliette
Institut des NanoSciences de Paris Sorbonne Université CNRS, Laboratoire de Physique de l'Ecole normale supérieure, ENS, Université PSL, CNRS, Sorbonne Université, Université de Paris