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Ultrafast exciton dephasing in PbS colloidal quantum dots

Masia, Francesco, Moreels, Iwan, Hens, Zeger, Langbein, Wolfgang and Borri, Paola 2011. Ultrafast exciton dephasing in PbS colloidal quantum dots. Presented at: Lasers and Electro-Optics Europe (CLEO EUROPE/EQEC), 2011 Conference on and 12th European Quantum Electronics Conference, Munich, Germany, 22-26 May 2011. Published in: Masia, Francesco, Moreels, I., Hens, Z., Langbein, Wolfgang Werner and Borri, Paola eds. 2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference (CLEO EUROPE/EQEC 2011). Institute of Electrical and Electronics Engineers ( IEEE ), p. 1. 10.1109/CLEOE.2011.5943583

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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.

Item Type: Conference or Workshop Item (Paper)
Date Type: Publication
Status: Published
Schools: Biosciences
Physics and Astronomy
Subjects: Q Science > Q Science (General)
Q Science > QH Natural history > QH301 Biology
T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Publisher: Institute of Electrical and Electronics Engineers ( IEEE )
ISBN: 9781457705335
Funders: EPSRC
Related URLs:
Last Modified: 02 May 2019 11:13
URI: http://orca-mwe.cf.ac.uk/id/eprint/27005

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