Title

Optical Saturable Absorption In Gold Nanoparticles

Keywords

Metal nanoparticles; Nonlinear absorption; Plasmonics; Saturable absorption; Surface plasmon resonance

Abstract

In this work, we present the experimental study of the nonlinear absorption of gold nanospheres and nanorods in aqueous suspension, using picosecond white-light supercontinuum open-aperture Z-scan. We demonstrate a saturable absorption effect in all particle suspensions at low-pulse energy. In the high-pulse energy regime, the apparent reverse-saturable absorption, observed in gold nanorods, was determined to be induced by photodegradation. Using the Lorentzian deconvolution method for the absorption spectra, we explain the variations on nonlinear optical effects and prove that saturable absorption only occurs within the plasmonic bands. © 2008 Springer Science+Business Media, LLC.

Publication Date

12-1-2008

Publication Title

Plasmonics

Volume

3

Issue

4

Number of Pages

171-176

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1007/s11468-008-9071-1

Socpus ID

56749164892 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/56749164892

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