DocumentCode
2082241
Title
Ultrafast exciton dephasing in PbS colloidal quantum dots
Author
Masia, Francesco ; Moreels, Iwan ; Hens, Zeger ; Langbein, Wolfgang ; Borri, Paola
Author_Institution
Sch. of Biosci., Cardiff Univ., Cardiff, UK
fYear
2011
fDate
22-26 May 2011
Firstpage
1
Lastpage
1
Abstract
In this work, we have measured the ground state excitonic dephasing in PbS QDs of sizes from 3.7nm to 5.7nm diameter in the temperature range from 5K to 100K by transient degenerate four-wave mixing (FWM) using 100fs pulses. A combination of heterodyne and k-selection detection was implemented to increase sensitivity and enable 4 orders of magnitude dynamic range in the FWM field detection.
Keywords
colloids; excitons; lead compounds; multiwave mixing; FWM field detection; PbS; colloidal quantum dots; heterodyne detection; k-selection detection; transient degenerate four-wave mixing; ultrafast exciton dephasing; Excitons; Lead; Nanocrystals; Phonons; Quantum dots; Temperature measurement; Transient analysis;
fLanguage
English
Publisher
ieee
Conference_Titel
Lasers and Electro-Optics Europe (CLEO EUROPE/EQEC), 2011 Conference on and 12th European Quantum Electronics Conference
Conference_Location
Munich
ISSN
Pending
Print_ISBN
978-1-4577-0533-5
Electronic_ISBN
Pending
Type
conf
DOI
10.1109/CLEOE.2011.5943583
Filename
5943583
Link To Document