One- and Two-Photon Excited Fluorescence of CdSe and CdSe/ZnS Quantum Dots in n-Hexane

Chin. Phys. Lett.

2006, Vol. 23

Issue (10): 2859-2862 DOI:

Original Articles

One- and Two-Photon Excited Fluorescence of CdSe and CdSe/ZnS Quantum Dots in n-Hexane

HAO Zhong-Hua^1,2;GONG Hong-Mei¹;HAN Jun-Bo¹;ZHAI Yue-Ying¹;WANG Qu-Quan^1,2

¹Department of Physics, Wuhan University, Wuhan 430072 ²Key Laboratory of Acoustic and Optic Materials and Devices of Ministry of Education, Wuhan University, Wuhan 430072

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HAO Zhong-Hua, GONG Hong-Mei, HAN Jun-Bo et al 2006 Chin. Phys. Lett. 23 2859-2862

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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.

Keywords: 78.67.-n 78.67.Hc 42.65.-k

Published: 01 October 2006

PACS:	78.67.-n	(Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures)
	78.67.Hc	(Quantum dots)
	42.65.-k	(Nonlinear optics)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2006/V23/I10/02859

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