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NIR Femtosecond Laser Induced Hyper-Rayleigh Scattering and Luminescence from Silver Nanoprisms

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Abstract:

The nonlinear response of silver nanoprisms (edge length 40 ± 5 nm and thickness 4.5 ± 0.5 nm) was studied by exciting with NIR femtosecond pulses (780–880 nm). These nanostructures were observed to generate hyper-Rayleigh scattering (HRS) and broadband luminescence. While HRS showed the expected second order power dependence, the luminescence was observed to follow a third order excitation power dependence. Both HRS and luminescence were observed to be dipolar in nature. The first hyperpolarizability of the nanoprisms was found to be an order of magnitude higher than ∼15 nm sized nanospheres.

Keywords: FIRST HYPERPOLARIZABILITY; HYPER-RAYLEIGH SCATTERING; LUMINESCENCE; MULTI-PHOTON EXCITATION; SILVER NANOPRISM

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2010.2462

Publication date: September 1, 2010

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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