Abstract
Abstract. One of the best challenges regarding the futuristic vision of smart-city technologies is to offer a comfortable self-governance energy, especially when it comes to electricity storage. If one wants to revolutionize a pre-existing way of living, it is inescapable to neglect basic ingredients gathered from basic physics. The topic of Metamaterials represents a key field that might be explored and thus exploited to propose unprecedented ideas for completely no-existing properties and functionalities. Unlike other ambitious techniques, with a simple stratified surface in combination with a suitable choice of materials, it is possible to propose new solar cells operating in a broad range of frequencies. In this paper, we demonstrate a manner to achieve strong coupling interaction between metallic gold nanowires with a WS2 and MoS2 multi-layer. The novelty of this work lies in the drastic stability of the effect of the thickness layer variation on both, absorption performances and the electric field distribution within the visible and near-infrared range. Accordingly, this new design may be considered of prime importance in several areas such as sensing and solar cell efficiency, to cite a few examples.
Highlights
Surface Plasmons (SPs), a collective oscillation of free electrons in the conduction band of metals, are evanescent waves sensitive to variation the optical properties of the surrounding media
We report on a numerical study using the Finite Elements Method (FEM) and the Drude-Lorentz model to predict accurately the optical signature of a gold nanowires anchored onto W S2 or M oS2 surfaces
We found that M oS2 is more desirable in the absorption purposes compared to W S2
Summary
Surface Plasmons (SPs), a collective oscillation of free electrons in the conduction band of metals, are evanescent waves sensitive to variation the optical properties of the surrounding media. This phenomenon, generally referred to as Surface Plasmon Resonance (SPR), takes place when the necessary momentum of the incident light is provided through a prism [1] Under these searched conditions, a maximum energy of the TM-polarized light gets transferred to the electron and results in a sharp peak in the absorption curve. The study of several physical parameters of the nanostructures makes it a promising assess of the generation of absorbing surfaces Parameters, such as the substrate’s chemical composition upon which the metal is deposited, the particles’ size and form, as well as the surrounding environment, can be optimized and evaluated using numerical models to predict their effects. For frequency-dependent complex permittivity of metal (gold), the formula is given by [11]:
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