Comb-like scattering realized by cylindrical plasmonic multilayers
We study the comb-like scattering response of cylindrical multilayered plasmonic nanostructures. Through oxide semiconductors with different doping levels, the comb-like scattering made up of multiple Fano resonances can be achieved with enough scattering excursion. Each sharp Fano resonance is associated with a degenerate state between a bipolar cloaking and a bipolar resonant scattering. When the semiconductor shell is thin enough, the scattering response is independent of the core and background materials, and even the size of the nanostructure under quasi-static conditions. The physical mechanism of the proposed comb-like device is explained by using full-wave electromagnetic simulation. Moreover, the scattering cross section of the device with a considerable thickness can exhibit reliable comb-like scattering under different thicknesses and material parameters, which is suitable for optical tagging applications.
Abstract Optical wireless communication technologies are finding a greater interest and wider attention within the research community of late. In this paper, we investigate the performance of a free space optical communication system over a generic propagation model called M -distributed channel in the presence of atmospheric turbulence. We analyzed a Subcarrier intensity-modulated free-space optical (SIM-FSO) communication system using DPSK and closed form expressions are derived using Meijer G function for bit error rate, channel capacity and outage probability for M -distribution.