Abstract
In this study, two ultra-fast all-optical plasmonic switches based on metal–insulator–metal (MIM) plasmonic waveguides side-coupled to the cavity by stubs are proposed. The cavities are filled with a nonlinear Kerr material and the switching occurs due to the self-phase-modulation (SPM) effect. The first structure can achieve an Off–On switching function by adjusting the intensity of the input light or utilizing the optical bistability effect at the 1550 nm and 850 nm telecommunication windows. In the second structure, by adding another nonlinear cavity a two-port switch is designed. The finite-deference time-domain (FDTD) method is used to obtain the simulation results. The ultra-fast switches that are being proposed are equipped with impressive switching mechanisms and have a response time that is measured in picoseconds. The Off–On switch has a response time of 0.25 ps, while the two-port switch has a response time of 1.5 ps. These all-optical switches have the potential to be extremely useful in photonic integrated circuits (PICs).
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The idea of this research article is based on M.R. Pav’s M.S. thesis, which was developed with the help of S. Pooretemad. Pav and Pooretemad conducted all the simulations, while all the steps were supervised by Prof. N. Granpayeh and they used his guidance in all stages. The manuscript was written by Pooretemad and Pav, and edited by prof. Granpayeh, who also reviewed the pictures, simulation results, and formulas.
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Pav, M., Pooretemad, S. & Granpayeh, N. Ultra-Fast All-Optical Plasmonic Dual-Band Nonlinear Off–On and Two-Port Switches. Plasmonics 19, 111–121 (2024). https://doi.org/10.1007/s11468-023-01966-y
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DOI: https://doi.org/10.1007/s11468-023-01966-y