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Proceedings Paper

Influence of the geometric shape of silver nanoparticles on optical limiting
Author(s): Stefanie Dengler; Olivier Muller; Gunnar Ritt; Bernd Eberle
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Paper Abstract

The optical limiting behaviour of silver nanoparticles with different sizes and shapes is investigated and compared to the optical limiting performances of conventional carbon black suspension. The optical limiting behaviour is characterized by means of nonlinear transmittance and scattered intensity measurements when submitted to a nanosecond pulsed Nd:YAG laser operating at the fundamental or the second harmonic wavelength. We found that the optical limiting effect is strongly particle size dependent, the best performance achieved with the smaller particles. Moreover, it is shown that the surface plasmon resonance is not the main effect responsible for the nonlinear processes. Especially, the particle size and its implication in the backscattering performance is outlined. A stronger backscattered radiation is observed for the 60 nm sized silver particles in comparison with the 580 nm large ones. Alternatively, a stronger scattering in the forward hemisphere is subsequent to nanoparticles whose sizes are significantly greater.

Paper Details

Date Published: 8 November 2012
PDF: 8 pages
Proc. SPIE 8545, Optical Materials and Biomaterials in Security and Defence Systems Technology IX, 854503 (8 November 2012); doi: 10.1117/12.973713
Show Author Affiliations
Stefanie Dengler, Fraunhofer Institute of Optronics,s System Technologies and Image Exploitation (Germany)
Olivier Muller, French-German Research Institute of St-Louis-ISL (France)
Gunnar Ritt, Fraunhofer Institute of Optronics,s System Technologies and Image Exploitation (Germany)
Bernd Eberle, Fraunhofer Institute of Optronics,s System Technologies and Image Exploitation (Germany)


Published in SPIE Proceedings Vol. 8545:
Optical Materials and Biomaterials in Security and Defence Systems Technology IX
Roberto Zamboni; François Kajzar; Attila A. Szep, Editor(s)

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