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|Title:||Three-photon absorption in water-soluble ZnS nanocrystals||Authors:||He, J.
|Issue Date:||1-May-2006||Citation:||He, J., Ji, W., Mi, J., Zheng, Y., Ying, J.Y. (2006-05-01). Three-photon absorption in water-soluble ZnS nanocrystals. Applied Physics Letters 88 (18) : -. ScholarBank@NUS Repository. https://doi.org/10.1063/1.2198823||Abstract:||We report on large three-photon absorption (3PA) in glutathione-capped ZnS semiconductor nanocrystals (NCs), determined by both Z -scan and transient transmission techniques with 120 fs laser pulses. The monodispersed, water-soluble ZnS NCs are synthesized by a modified protocol with a mean diameter of 2.5 nm. Their 3PA cross section is determined to be ∼2.7× 10-78 cm6 s2 photon-2 at an optimal wavelength of commercial Ti:sapphire femtosecond lasers. This value is nearly one order of magnitude greater than that of CdS NCs, and four to five orders of magnitude higher than those of the previously reported common UV fluorescent dyes. © 2006 American Institute of Physics.||Source Title:||Applied Physics Letters||URI:||http://scholarbank.nus.edu.sg/handle/10635/98401||ISSN:||00036951||DOI:||10.1063/1.2198823|
|Appears in Collections:||Staff Publications|
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