Tunable Plasmonic Filter Based on Improved Quasiperiodic Structure

In this research, we introduce a novel approach to create a tunable multi-channel plasmonic mid-infrared filter. This innovative filter comprises a single layer of graphene deposited on an improved Fibonacci quasiperiodic structure. What makes this filter particularly intriguing is its capacity to adjust its filtering characteristics by manipulating the chemical potential of graphene and other relevant structural parameters. We delve into a comprehensive analysis of the results through dispersion relations, shedding light on the mechanisms underlying its tunability. The proposed structure holds potential for applications in sensors, tunable devices, and next-generation integrated photonic circuits. Ultimately, our investigation deepens our understanding of how nonperiodic structures can effectively achieve a multi-channel plasmonic filter, potentially leading to more efficient photonic components and devices across industries.