Abstract
A novel plasmonic structure is proposed to achieve plasmon-induced transparency (PIT), which is composed of a stub resonator (SR) and a square ring resonator (SRR). The research delves into the theoretical calculations and numerical simulations to explore the formation and evolution mechanisms of PIT. In this innovative structure, the evolution of PIT is notably influenced by geometric parameters, and its sensing performance in various environments is thoroughly examined. Furthermore, the study evaluates its potential applications in the domains of slow light and optical switches. Moreover, the introduction of an additional SR and SRR to the original structure leads to a multi-PIT phenomenon, and the underlying reasons for this phenomenon are elucidated. Meanwhile, the sensor sensitivity in air, alcohol, and glucose media is calculated to be improved by 12.5%, 12.7%, and 9.1%, respectively, compared with the previous work. This hybrid structure effectively enhances the overall performance of the plasmonic system in practical applications. Consequently, this proposed plasmonic structure introduces a fresh perspective for the development of multifunctional nanoscale optical devices, particularly in the realms of nanosensors, slow light technologies, optical storage, and optical switches.
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The data results come from COMSOL simulation results, and the material properties come from the COMSOL material library.
References
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Funding
This study is supported by the National Natural Science Foundation of China, grant number 62165013.