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American Institute of Physics, Applied Physics Letters, 10(94), p. 103117

DOI: 10.1063/1.3100196

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Enhanced two-photon absorption of CdS nanocrystal rods

Journal article published in 2009 by Xiangping Li, Joel van Embden ORCID, James W. M. Chon, Min Gu
This paper is available in a repository.
This paper is available in a repository.

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Abstract

In this letter we report that CdS nanocrystals are reshaped into an elongated rod form for increasing two-photon absorption. CdS quantum rods with uniform rod dimensions have been synthesized and their two-photon absorption cross section in solution has been characterized using the z-scan method and the two-photon induced fluorescence study. The absorption cross section was found to be 20.9×10−46 cm4/s photon−1 under two-photon excitation at wavelength 800 nm, which is an order of magnitude larger than that of CdS quantum dots of similar diameters. The higher two-photon absorption coefficient establishes the potential of this class of quantum rods for various photonic applications.