研究目的
Investigating the plasmonic properties and optical activity of a three-dimensional six-blade windmill nanostructure to achieve strong circular dichroism effects.
研究成果
The three-dimensional windmill nanostructure exhibits pronounced optical activity enhancement and strong circular dichroism effects, with the maximum g-factor reaching 0.6. The optical activity is highly sensitive to the lift-up degree of the blades, suggesting potential applications in biosensors, surface enhanced spectroscopy, and refractive index detection.
研究不足
The study is based on numerical simulations, and the practical fabrication of such nanostructures may present challenges due to high production costs and difficulty of fabrication.
1：Experimental Design and Method Selection:
The study employs numerical simulations using a commercial FEM package (Comsol Multiphysics) to analyze the optical activity and plasmonic properties of the nanostructure.
2：Sample Selection and Data Sources:
The nanostructure is modeled with silver, supported by a glass substrate, and surrounded by air.
3：List of Experimental Equipment and Materials:
The material parameters for silver were taken from a reference, and the structure is surrounded by a perfect matching layer to simulate the far field.
4：Experimental Procedures and Operational Workflow:
The structure is illuminated with left and right circularly polarized light, and the transmittance and reflection are calculated using S-parameters.
5：Data Analysis Methods:
The asymmetry g-factor is calculated to define the difference in transmittance for both LCP and RCP light.
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