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|Title:||Two-photon-enhanced three-photon absorption in transition-metal-doped semiconductor quantum dots|
|Authors:||Feng, X.B. |
Transition-metal-doped semiconductor quantum dots (d-QDs)
|Source:||Feng, X.B.,Xing, G.C.,Ji, W. (2009). Two-photon-enhanced three-photon absorption in transition-metal-doped semiconductor quantum dots. Journal of Optics A: Pure and Applied Optics 11 (2) : -. ScholarBank@NUS Repository. https://doi.org/2/024004|
|Abstract:||We report the observation of two-photon-enhanced three-photon absorption (3PA) in transition-metal-doped semiconductor quantum dots (d-QDs) in the near-infrared spectral region. Due to the degeneracy between two-photon transitions to the states of metal ions inside the bandgap and three-photon transitions to the excitonic state, the 3PA cross-section is greatly enhanced in comparison with the predictions by the 3PA theory derived under the four-band approximation. Together with the enhancement in their photoluminescence, such an enhancement mechanism is highly desirable in the design and optimization of fluorescent d-QDs for potential applications based on three-photon-excited fluorescence. © 2009 IOP Publishing Ltd.|
|Source Title:||Journal of Optics A: Pure and Applied Optics|
|Appears in Collections:||Staff Publications|
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