The Empirical Correlation Between Size and Two‐Photon Absorption Cross Section of CdSe and CdTe Quantum Dots
- 2 October 2006
- Vol. 2 (11), 1308-1313
- https://doi.org/10.1002/smll.200600157
Abstract
The tuning of CdSe quantum dot (QDs) sizes, and consequently their corresponding two-photon absorption (TPA) cross section, has been systematically investigated. As the size (diameter) of the quantum dots increases, the TPA cross section is found to be empirically related via a power-law proportionality of 3.5±0.5 and 5.6±0.7 to the diameters of CdSe and CdTe QDs, respectively. The results are tentatively rationalized via a theoretical model of two-photon excitation properties in a system incorporating excitons and defects.Keywords
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