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Proceedings Paper

State-resolved exciton dynamics in quantum dots
Author(s): Patanjali Kambhampati
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Paper Abstract

The elementary excitation in semiconductor quantum dots is the exciton, an excited electron-hole pair. The size and geometry of the dot confines the exciton thereby yielding quantum confinement effects. The simplest examples of size quantization effects include the spectrum of single exciton states which dominate the linear absorption spectrum and the Stokes shift for the spontaneous photoluminescence spectrum. Here, we report on our recent results exploring the structure and dynamics of both single excitons and multi-excitons in colloidal CdSe quantum dots using femtosecond state-resolved pump/probe spectroscopy. These experiments have revealed tremendous insight into the relaxation pathways of hot excitons, new aspects of exciton-phonon interactions, and in the first observation of the electronic structure of multi-excitons.

Paper Details

Date Published: 30 August 2010
PDF: 9 pages
Proc. SPIE 7758, Physical Chemistry of Interfaces and Nanomaterials IX, 77580R (30 August 2010); doi: 10.1117/12.862016
Show Author Affiliations
Patanjali Kambhampati, McGill Univ. (Canada)

Published in SPIE Proceedings Vol. 7758:
Physical Chemistry of Interfaces and Nanomaterials IX
Oleg V. Prezhdo, Editor(s)

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