Nanocomposite Multilayer Structure for Broadband MIR Negative Refractive Index

Abstract

 Abstract-The main purpose of this work is designing a structure with broadband Negative Refractive Index (NRI) in the wavelengths range of 3-5 µm using multilayer structures. In the proposed structure actually nano composite thin films are used to make multilayer waveguide to show effective NRI. In the composite structure, core-shell nanoparticles including metallic core and a polymeric shell with high refractive index are used. Here, it is shown that by increasing the number of composite layers the bandwidth for NRI can be increased. Therefore, based on simulation results, in eight-layer waveguide, NRI is available in complete 3 to 5 µm MIR band. In this regard, also, the effect of filling factor (in each thin film layer) on NRI is studied. Index Terms-Metamaterial, Negative Refractive Index and Multilayer Waveguide 0733-8724 (c)

Four-layer nanocomposite structure as an effective optical waveguide switcher for near-IR regime

“…The investigation of the multimode four-layer waveguide structures by modified m-line spectroscopy method was presented in [31]. During the last decade different multilayered waveguiding structures had been studied: the magnetic photonic crystals [32][33][34], nanocomposite multilayers and photonic crystal waveguides [35], silicon-based hybrid gap surface plasmon polariton waveguides [36], nanophotonic and plasmonic waveguides [37] and multilayer graphene waveguides [38]. Besides, four-layer structures due to the enhanced field confinement in guiding layer [39,40] can be effectively used in medical applications such as label free biosensors.…”

Optical properties of a four-layer waveguiding nanocomposite structure in near-IR regime

“…On the other hand, multilayered nanocomposite (NC) structures are of great interest due to their specific properties which make them suitable for wide applications (Haus 2016). During the last decade different multilayered waveguide structures have been studied: the magnetic photonic crystals (Khokhlov et al 2015;Khosravi et al 2015;Sylgacheva et al 2016a;Sylgacheva et al 2016b), multilayered waveguides (Dotsch et al 2005), silicon-based hybrid gap surface plasmon polariton waveguides (Rao and Tang 2012), nanophotonic and plasmonic waveguides (Alaeian and Dionne 2014) and multilayer graphene waveguides (Smirnova et al 2014).…”