Gear nano antenna for plasmonie photovoltaic

In this paper a novel nanoparticle structure has been presented to be used in plasmonic photovoltaic to enhance its efficiency. The proposed structure is a silver gear structure that is expected to make good enhancement of light absorption inside the semiconductor forming the photovoltaics (PV) in the visible range of frequencies (200-800 THz). The nano antenna particle is embedded inside the photovoltaics and produces highly confined near-field around the nanoparticle and withing the semiconductor. The extinction cross-section of the proposed nanoparticle in vacuum has been calculated versus the wavelength. Also, the modes of fields are studied and finally the effect of embedding this gear nanoparticle in a silicon photovoltaic is investigated by comparing its absorption with the conventional disk nanoparticle. The proposed structure enhances the light absorption in the near infrared region, which improves the efficiency of the PV solar cells.