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|Title:||Three-photon absorption in semiconductor quantum dots: Experiment||Authors:||Xiaobo, F.
|Issue Date:||12-May-2008||Citation:||Xiaobo, F., Yu, L.A., Jun, H., Ben, C.W.J., Hairu, X., Wee, S.C., Wei, J. (2008-05-12). Three-photon absorption in semiconductor quantum dots: Experiment. Optics Express 16 (10) : 6999-7005. ScholarBank@NUS Repository. https://doi.org/10.1364/OE.16.006999||Abstract:||The four-band model, derived under the effective-mass approximation for cubic semiconductor quantum dots (QDs), is compared with experimental measurements on frequency degenerate three-photon absorption (3PA) in CdSe QDs and ZnS QDs. Qualitatively, the model provides the correct prediction on the magnitude of the 3PA cross-sections, which are in the range from 10 -79 to 10-77 cm6s2photon -2 in the light frequency region of interest. More noticeably, the theoretical conclusion of an increasing tendency in the 3PA cross-sections with increasing dot-size is in agreement with the experiment. The discrepancy is also found for smaller QDs (dot-radius is less than one-third of the exciton Bohr radius), which is attributed to neglecting the mixing among the three valence bands in the theory. © 2008 Optical Society of America.||Source Title:||Optics Express||URI:||http://scholarbank.nus.edu.sg/handle/10635/95316||ISSN:||10944087||DOI:||10.1364/OE.16.006999|
|Appears in Collections:||Staff Publications|
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