Title :
Role of surface and interface defects in ultrafast carrier dynamics in core and core/shell CdSe quantum rods
Author :
Zavelani-Rossi, M. ; Creti, A. ; Lanzani, G. ; Lomascolo, M. ; Anni, M. ; Della Sala, F. ; Manna, L.
Author_Institution :
Dipt. di Fisica, Politecnico di Milano, Milan, Italy
Abstract :
This work investigates the ultrafast carrier dynamics, in bare CdSe core and core/shell CdSe/CdS/ZnS quantum rods by means of femtosecond pump-probe transient spectroscopy. This paper studies the competition between optical gain and photo-induced absorption mechanisms and clarifies how the shell modifies these processes.
Keywords :
II-VI semiconductors; cadmium compounds; high-speed optical techniques; interface states; photoluminescence; wide band gap semiconductors; zinc compounds; CDSe core; CdSe quantum rods; CdSe-CdS-ZnS; core-shell CdSe; femtosecond spectroscopy; interface defects; optical gain; photo-induced absorption; pump-probe transient spectroscopy; surface defects; ultrafast carrier dynamics; Absorption; Bleaching; Delay effects; Laboratories; Nanocrystals; Nanotechnology; Optical pumping; Optical surface waves; Shape control; Ultrafast optics;
Conference_Titel :
Quantum Electronics Conference, 2005. EQEC '05. European
Print_ISBN :
0-7803-8973-5
DOI :
10.1109/EQEC.2005.1567332
