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Opt Lett. 2010 Apr 15;35(8):1178-80. doi: 10.1364/OL.35.001178.

Enhanced absorption of light by charged nanoparticles.

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  • 1Electrical and Computer Engineering Department, Satellite and Wireless Communication Laboratory,Ben-Gurion University of the Negev, P.O. Box 653, IL-84105 Beer Sheva, Israel. rosenkra@bgu.ac.il


We found that various charged nanoparticles (NPs) can raise the attenuation of electromagnetic (EM) radiation over 30 times more efficiently during resonance in comparison to equivalent noncharged particles for a given set of parameters. A condition that indicates a state of resonance between the incident EM radiation and the NP surface excitations is mathematically derived. Our results shed light on the mechanism responsible for the strong absorption of light by such charged NPs. The outcome of this research could help to design a new generation of communication devices as well as a new technique for biological cell imaging.

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