研究目的
Investigating the dual plasmon-induced transparency and the relevant sensing property in a multi-cross metasurface by the coupled mode analysis.
研究成果
The study demonstrated a dual plasmon-induced transparency and relevant sensing property in a multi-cross metasurface, achieving a high figure of merit of 223 and sensitivity of 850 nm/RIU. A group delay of 0.45 ps and group index of ~95 were obtained around 1170 nm near infrared, suggesting applications in highly sensitive plasmonic biosensors and integrated optical devices.
研究不足
The study is primarily theoretical and numerical, with potential limitations in practical fabrication and experimental validation of the proposed metasurface. The sensitivity and performance of the sensor in real-world applications may vary due to environmental factors and fabrication imperfections.
1：Experimental Design and Method Selection:
The study involved theoretical and numerical analysis of a dual plasmon-induced transparency effect in a multi-cross metasurface using coupled mode theory. A phase coupling model was established to characterize the optical response.
2：Sample Selection and Data Sources:
The metasurface was fabricated on a glass substrate with gold multi-cross structures. The metal gold was taken from Palik (0–2 μm).
3：List of Experimental Equipment and Materials:
The study utilized numerical simulations performed by the FDTD method with a mesh step of Δx = Δy = Δz = 2 nm.
4：Experimental Procedures and Operational Workflow:
The transmission response of the individual cross-shaped metasurface was simulated, and the effect of various structural parameters on the transmission response was analyzed.
5：Data Analysis Methods:
The theoretical transmission property was analyzed using derived coupled mode theory equations, and numerical simulations were provided for comparison.
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