Please use this identifier to cite or link to this item: https://doi.org/10.1063/1.2952273
Title: Intensity-dependent enhancement of saturable absorption in PbS- Au 4 nanohybrid composites: Evidence for resonant energy transfer by Auger recombination
Authors: Elim, H.I. 
Ji, W. 
Yang, J. 
Lee, J.Y. 
Issue Date: 2008
Citation: Elim, H.I., Ji, W., Yang, J., Lee, J.Y. (2008). Intensity-dependent enhancement of saturable absorption in PbS- Au 4 nanohybrid composites: Evidence for resonant energy transfer by Auger recombination. Applied Physics Letters 92 (25) : -. ScholarBank@NUS Repository. https://doi.org/10.1063/1.2952273
Abstract: Intensity-dependent enhancement of saturable absorption in a film of PbS- Au4 nanohybrid composites has been observed by femtosecond time-resolved transient absorption measurement at 780 nm. The nonlinear absorption coefficient (α2) of saturable absorption in PbS- Au4 nanohybrid composites is found to be dependent on excitation irradiance and it is determined to be -2.9 cmGW at 78 GW cm2, an enhancement of nearly fourfold in comparison with that of pure PbS quantum dots (QDs). The enhancement is attributed to the excitation of surface plasmon by resonant energy transfer between PbS QDs and Au nanoparticles through Auger recombination. © 2008 American Institute of Physics.
Source Title: Applied Physics Letters
URI: http://scholarbank.nus.edu.sg/handle/10635/89259
ISSN: 00036951
DOI: 10.1063/1.2952273
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