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Journal of Nanophotonics

Z-scan studies of nonlinear optical properties of colloidal gold nanorods and nanoshells
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Paper Abstract

A quantitative comparison of third-order nonlinear optical properties of colloidal gold nanoshells (NSs) and gold nanorods (NRs) in water solutions has been carried out using open- and closed-aperture Z-scan measurements, performed with femtosecond laser pulses over a broad range of wavelengths. Absorption saturation was found to be a dominant effect for all the studied nanoparticles; however, two-photon absorption (2PA) properties were also detected, and were clearly resolved especially at the shortest wavelengths used. The value of the merit factor σ2/M (2PA cross section scaled by the molecular weight) for the NRs (10×35  nm) at 530 nm is 7.5 (GM·mol/g), while for the NSs it is 1.9 (GM·mol/g) at the same wavelength.

Paper Details

Date Published: 24 December 2014
PDF: 11 pages
J. Nanophoton. 9(1) 093797 doi: 10.1117/1.JNP.9.093797
Published in: Journal of Nanophotonics Volume 9, Issue 1
Show Author Affiliations
Marta Gordel, Wroclaw Univ. of Technology (Poland)
Ecole Normale Supérieure de Cachan (France)
Radoslaw Kolkowski, Wroclaw Univ. of Technology (Poland)
Ecole Normale Supérieure de Cachan (France)
Joanna Olesiak-Banska, Wroclaw Univ. of Technology (Poland)
Katarzyna Matczyszyn, Wroclaw Univ. of Technology (Poland)
Malcolm Buckle, Ecole Normale Supérieure de Cachan (France)
Marek Samoć, Wroclaw Univ. of Technology (Poland)


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