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Title: Optical limiting properties of hydrophobic poly(etherimide) membranes embedded with isolated and aggregated gold nanostructures
Authors: D'Britto, V.
Suchand Sandeep, C.S.
Philip, Reji
Prasad, B.L.V.
Keywords: Optical limiting
Nonlinear optical properties
Gold nanoparticles
Phase transfer
Nanoparticle aggregation
Polymer nanocomposites
Issue Date: Dec-2009
Publisher: Elsevier B.V.
Citation: Colloids and Surfaces -A, 2009, Vol.352, p79
Abstract: A simple method to incorporate spherical or aggregated nanostructures of gold into hydrophobic poly(etherimide) membranes is demonstrated and their comparative nonlinear optical properties are investigated. When excited at 532 nm using laser pulses of 7 ns duration, a reduced transmission behaviour in both the cases, viz., polymers embedded with isolated nanoparticles and their aggregates is observed. This fits to a three-photon type nonlinear absorption process and is attributed to excited state absorption occurring in the nanostructures. Interestingly, the nonlinearity is more prominent in the aggregated nanostructures compared to the spherical nanostructures. These materials are potential candidates for optical limiting applications.
Description: Restricted Access.
ISSN: 0927-7757 (Online)
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Copyright: 2009 Elsevier B.V.
Appears in Collections:Research Papers (LAMP)

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