Comparative Optoelectronic Modelling and Analysis of Metallic and Dielectric Spherical Nanoptennas

Nanoptennas are revolution in the field of digital and wireless communication technology. Plasmonics are capable of converting the concepts of microwave and radio frequency electronics to optical wavelengths by initiating faster, smaller and more efficient optical electronic interfaces. In other words, plasmonics build a bridge between photonics and electronics [1,2]. These plasmonics nanoptenna converts the propogating electromagnetic radiation into electrical signals which are plasmon (coherent oscillation of surface electrons) and vice versa [3-5]. Moreover, traditional microstrip antennas cannot be used at optical frequencies in the range of THz due to increased losses and inefficiencies. At GHz (radio frequencies) geometry of an antenna can be utilized to shrink their sizes, but at THz (optical frequencies) dispersive permittivity enables the shrinking of sizes. These are basically nanoantennas designed for working operations at optical frequencies.