Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
595661 | Colloids and Surfaces A: Physicochemical and Engineering Aspects | 2009 | 5 Pages |
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 532Â nm using laser pulses of 7Â 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.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Colloid and Surface Chemistry
Authors
V. D'Britto, C.S. Suchand Sandeep, R. Philip, B.L.V. Prasad,