Numerical analysis of tunable nonlinear plasmonic router based on nanoscale ring resonators
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Numerical analysis of tunable nonlinear plasmonic router based on nanoscale ring resonators Morteza Mansuri1 · Ali Mir1 · Ali Farmani1 Received: 7 August 2020 / Accepted: 22 September 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract In the advanced plasmonics integrated circuits (PICs) there has been outstanding, continuing interest in developing routers to harness light-matter interactions in nanoscale dimensions with wanted optical properties. In this regard, herein, we introduce an all-optical router based on nanometer ring resonator which surface plasmon resonance (SPR) and nonlinear materials are used simultaneously to enhance high performance range. By changing the radius of the ring resonator and the intensity of the light we achieved control of the parameters and the routing. The results of routing and shifting the central frequency with light intensity and radius of the ring resonator are studied. The performance of the router indicates that a ring is required for each ports, which changes the control parameters to change its central frequency, as well as we can be said the use of switches and filters as other design features. These routers have advantages such as nano scale size, low light intensity, fast response time, integratable and etc., which are highly used in all-optical circuits, image processing and today’s modern technology. In our simulation, we consider transmission or reflection of light in each ports based on the finite difference time domain (FDTD). Keywords Nanoscale routers · Plasmonic · Surface plasmon
1 Introduction Recently a new branch of research called “plasmonic” has emerged that deals with the science and technology of surface plasmon resonance (SPR). Plasmonics type of the interesting field of nanophotonics, which test smaller than wavelengths in the electromagnetic fields can be ordered. It is based on interaction between conductive electrons at metal interfaces or in small metal nanostructures and electromagnetic beams, leading to an enhanced optical near field of sub-wavelength dimension. The two main ingredients of plasmonics surface plasmon polaritons (SPPs) and localized surface plasmons (LSP). Surface plasmon polaritons are localized surface electromagnetic (EM) waves, which propagate along the interface between metals and dielectric materials. Metal * Ali Farmani [email protected] 1
Department of Electrical Engineering, Lorestan University, Khoramabbad, Iran
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surface plasmon polaritons to overcome the limitation of optical diffraction so are considered to be one of the most promising research directions in the field of integrated optics (Barnes et al. 2003; Gong et al. 2011a; Farmani and Mir 2019). Due to the interaction of light with the free metal electron, many devices were made smaller scale than the wavelength. Recently, many devices based on SPPs (Hu et al. 2012; Alipour et al. 2018; Bana et al. 2018), such as slow light waveguides (Wang et al. 2012), and the u
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