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Computer Simulation of Surface Plasmon Resonance in Metal Nanoparticles Warren Mar PI: Edward T. Yu in collaboration with: Swee-Hoe Lim, Daniel Derkacs, and Bin Feng Electrical Engineering, UCSD, La Jolla, CA 92093 [email protected] [email protected] Finite Element Modeling Space is broken up into tetrahedrons. This enables the use of less elements for less important areas and more elements for the resonance effect. Plasmon Resonance The incident electromagnetic radiation is coupled to vibrations of the electron gas in the metal nanoparticles. At resonance this effect produces strong electric fields near the particle. Simulation Methodology The simulations utilize a linearly polarized plane wave at normal incidence. The metal is modeled by a complex frequency dependent dielectric function, whereas the substrate is treated as a simple dielectric. Substrate Nanoparticle Enhancement Normally the incident light shining on a silicon substrate gets reflected and only a portion makes it into the substrate. The strength of the flied in the substrate is strengthen by the resonance effect in the metal nanoparticle. + = Results Future The 3D simulations successfully simulated the plasmon resonance response in freespace. Placing a metal nanoparticle on top of a silicon substrate focuses the field near the substrate and this strong field penetrates into the substrate. Many factors, such as material, size, and shape affect the field profile in the substrate. Novel optical electronic devices can be designed to take advantage of this effect. Knowing the field profile will aid in optimizing device characteristics for specific applications. One promising application is utilizing nanoparticles to increase the performance of solar cells.