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.
© 2010 Optical Society of America
Original Manuscript: February 4, 2010
Manuscript Accepted: February 23, 2010
Published: April 13, 2010
Vol. 5, Iss. 9 Virtual Journal for Biomedical Optics
Etai Rosenkrantz and Shlomi Arnon, "Enhanced absorption of light by charged nanoparticles," Opt. Lett. 35, 1178-1180 (2010)