Exciton-Exciton Interaction and Optical Gain in Colloidal CdSe/CdS Dot/Rod Nanocrystals.
Exciton-exciton interaction in dot/rod CdSe/CdS nanocrystals has proved to be very sensitive to the shape of nanocrystals, due to the unique band alignment between CdSe and CdS. Repulsive exciton-exciton interaction is demonstrated, which makes CdSe/CdS dot/rods promising gain media for solution-processable lasers, with projected pump threshold densities below 1 kW cm(-2) for continuous wave lasing.
Dipartimento di Fisica and SLACS-CNR/INFM, Università di Cagliari 09042 Monserrato (Italy).
Michele
M
Saba
Institute of Semiconductor and Solid State Physics Johannes Kepler University Altenbergerstr. 6g, 4040 Linz (Austria).
Stefan
S
Minniberger
Dipartimento di Fisica and SLACS-CNR/INFM, Università di Cagliari 09042 Monserrato (Italy).
Francesco
F
Quochi
Institute of Semiconductor and Solid State Physics Johannes Kepler University Altenbergerstr. 6g, 4040 Linz (Austria).
Juergen
J
Roither
Dipartimento di Fisica and SLACS-CNR/INFM, Università di Cagliari 09042 Monserrato (Italy).
Marco
M
Marceddu
Dipartimento di Fisica and SLACS-CNR/INFM, Università di Cagliari 09042 Monserrato (Italy).
Agnieszka
A
Gocalinska
Department of Chemistry, The University of Chicago Chicago, IL 60637 (USA).
Maksym V
MV
Kovalenko
Department of Chemistry, The University of Chicago Chicago, IL 60637 (USA).
Dmitri V
DV
Talapin
Institute of Semiconductor and Solid State Physics Johannes Kepler University Altenbergerstr. 6g, 4040 Linz (Austria).
Wolfgang
W
Heiss
Dipartimento di Fisica and SLACS-CNR/INFM, Università di Cagliari 09042 Monserrato (Italy).
Andrea
A
Mura
Dipartimento di Fisica and SLACS-CNR/INFM, Università di Cagliari 09042 Monserrato (Italy).
Giovanni
G
Bongiovanni
colloidal nanocrystals; optical nonlinearities; ultrafast spectroscopy