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Proceedings Paper

Time-resolved and time-integrated spectroscopy studies of the optical properties of silicon quantum dots
Author(s): Lap Van Dao; Xiaoming Wen; Peter Hannaford
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Paper Abstract

Using time-resolved and time-integrated photoluminescence and spectrally resolved two-colour three-pulse photon echo spectroscopy we study the quantum confinement and dephasing properties of near spherical Si QDs with an average size of 4.3 nm. Filling of the low energy states and parabolic confinement of the quantum dot structures can be inferred from the dependence of the photoluminescence intensity on the detection wavelengths. A dephasing time of 1 - 1.8 ps which is slightly dependent on the quantum dot energy states can be measured. We show that the dephasing time of the electrons in the quantum dots is strongly influenced by the density of excited carriers.

Paper Details

Date Published: 15 February 2006
PDF: 5 pages
Proc. SPIE 6118, Ultrafast Phenomena in Semiconductors and Nanostructure Materials X, 61180P (15 February 2006); doi: 10.1117/12.641101
Show Author Affiliations
Lap Van Dao, Swinburne Univ. of Technology (Australia)
Xiaoming Wen, Swinburne Univ. of Technology (Australia)
Peter Hannaford, Swinburne Univ. of Technology (Australia)

Published in SPIE Proceedings Vol. 6118:
Ultrafast Phenomena in Semiconductors and Nanostructure Materials X
Kong-Thon Tsen; Jin-Joo Song; Hongxing Jiang, Editor(s)

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