研究目的
To investigate a U-shape structure for sensing applications based on dual plasmon induced transparency, focusing on its transmission properties, sensitivity, and figure of merit for nano sensors.
研究成果
The U-shape structure exhibits dual plasmon induced transparency due to interaction among modes, with high sensitivity (up to 1225 nm/RIU) and figure of merit (up to 62.5), making it promising for integrated optical circuits and nano sensors. The lateral displacement S significantly affects transmission properties.
研究不足
The theoretical model neglects propagation and coupling losses as well as phase shift, which may cause deviations from simulation results. The study is based on simulations and theoretical analysis without experimental validation.
1：Experimental Design and Method Selection:
The study uses numerical simulations based on the finite-difference time-domain (FDTD) method and theoretical analysis using coupled mode theory (CMT) to model the U-shape structure.
2：Sample Selection and Data Sources:
The structure is composed of silver cavities and a bus waveguide with specific dimensions (e.g., widths and lengths).
3：List of Experimental Equipment and Materials:
Silver is used for the cavities and waveguide, characterized by the Drude model.
4：Experimental Procedures and Operational Workflow:
Simulations are performed to analyze transmission spectra and magnetic fields under various conditions, such as changes in lateral displacement S and refractive index of the surrounding medium.
5：Data Analysis Methods:
Transmission is calculated as T = P_out / P_in, and sensitivity and figure of merit are derived from wavelength shifts and full width at half maximum (FWHM).
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