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Title: Three-photon absorption in semiconductor quantum dots: Experiment
Authors: Xiaobo, F. 
Yu, L.A.
Jun, H. 
Ben, C.W.J.
Hairu, X. 
Wee, S.C. 
Wei, J. 
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.
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
ISSN: 10944087
DOI: 10.1364/OE.16.006999
Appears in Collections:Staff Publications

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