Abstract
In this study, a plasmonic nano-sensor with excellent performance based on aperture-coupled square resonator is proposed. Utilizing the 2D finite element algorithm, the transmission characteristics of MIM waveguide structure are systematically explored. Simulation shows that a sharp fano line-shape is formed in a succinct structure with its FOM (figure of merit) over 2000. In addition, we systematically investigate the coupling distance, the geometric parameter of the resonator, in detail. Optimizing the structural parameter results and introducing asymmetry into the structure by two means, such as horizontally moving the center of square resonator or adding a tiny groove besides the square resonator. Both of these can cause extra fano profile in transmission pattern while the former fano profile maintains stable, thus this property makes the metrics in sensor of this structure more abundant. Results prove that this compact and asymmetric structure has great potential application in nano-sensor, optical switches and nonlinear devices in future highly integrated optical circuits.
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This paper is supported by “the Fundamental Research Funds for the Central Universities” (No. 2022RC23).
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Yu, C., Lv, N., Wei, L., Zhang, Y., Lv, X. (2023). High Resolution Multi-indicator MIM Nano-Sensor Based on Aperture-Coupled Asymmetric Square Resonator. In: Sun, F., Cangelosi, A., Zhang, J., Yu, Y., Liu, H., Fang, B. (eds) Cognitive Systems and Information Processing. ICCSIP 2022. Communications in Computer and Information Science, vol 1787. Springer, Singapore. https://doi.org/10.1007/978-981-99-0617-8_35
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DOI: https://doi.org/10.1007/978-981-99-0617-8_35
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