One- and Two-Photon Excited Fluorescence of CdSe and CdSe/ZnS Quantum Dots in n-Hexane
HAO Zhong-Hua1,2, GONG Hong-Mei1, HAN Jun-Bo1, ZHAI Yue-Ying1, WANG Qu-Quan1,2
1Department of Physics, Wuhan University, Wuhan 430072
2Key Laboratory of Acoustic and Optic Materials and Devices of Ministry of Education, Wuhan University, Wuhan 430072
One- and Two-Photon Excited Fluorescence of CdSe and CdSe/ZnS Quantum Dots in n-Hexane
1Department of Physics, Wuhan University, Wuhan 430072
2Key Laboratory of Acoustic and Optic Materials and Devices of Ministry of Education, Wuhan University, Wuhan 430072
Abstract： One- and two-photon absorption and excited fluorescence of the CdSe and the core-shell structure CdSe/ZnS quantum dots (QDs) in n-hexane is investigated. The linear and nonlinear absorption coefficients are measured and the two-photon-absorption cross sections of the QDs are also obtained. For both one-photon fluorescence and two-photon fluorescence, the emission efficiency of CdSe/ZnS is much higher than that of CdSe, originating from the effective surface passivation of the core-shell structure.
HAO Zhong-Hua;GONG Hong-Mei;HAN Jun-Bo;ZHAI Yue-Ying;WANG Qu-Quan;. One- and Two-Photon Excited Fluorescence of CdSe and CdSe/ZnS Quantum Dots in n-Hexane[J]. 中国物理快报, 2006, 23(10): 2859-2862.
HAO Zhong-Hua, GONG Hong-Mei, HAN Jun-Bo, ZHAI Yue-Ying, WANG Qu-Quan,. One- and Two-Photon Excited Fluorescence of CdSe and CdSe/ZnS Quantum Dots in n-Hexane. Chin. Phys. Lett., 2006, 23(10): 2859-2862.
2006, Vol. 23 
