We present the novel approach to investigate properties of the 3D plasmon excited on a metal sphere. The exact plasmon field extracted from the scattered field given by Mie theory allows for a new interpretation of the 3D plasmon by four short-range-like plasmons excited and rotating simultaneously around the sphere.
In this work, high sensitivity noble metals used in the Kretschmann configuration based photodetectors applied to detect the presence of biological and chemical species in solutions are investigated. The angle of incidence and film thickness dependencies of the surface plasmon polariton resonance (SPPR) of gold, silver and copper by the attenuated total reflection (ATR) method are studied to monitor and evaluate the SPR reflectance angle and reflectivity change. The analysis of the electric field of the surface plasmon wave which appears at the interface between the metallic layer and the air is carried out by the finite element method (FEM). The simulation is performed using COMSOL Multiphysics software which supports FEM. The aim of the present study is to find the most suitable noble metal and its optimum thickness to improve the performance of the SPR photodetector. Keywords: Attenuated total reflection method, FEM based COMSOL multiphysics software, Kretschmann configuration, noble metals, reflectivity.
Interdigitated metal-semiconductor-metal (MSM) photodetectors based on InAlAs/InGaAs materials have attracted much attention for applications in high-speed optical-fiber communication systems which need efficient light detection in the 1.3-1.55 µm range [1]. The performance of thin-film inverted MSM are analyzed and compared to conventional MSM, that was modeled and simulated using Silvaco TCAD (Technology Computer Aided Design) and ATLAS software. We show how the interdigital spacing and thickness of the InGaAs layer influence the impulse response and the associated bandwidth [2].
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.