研究目的
Investigating the IR plasmonic properties of sub-wavelength ITO rod arrays using anisotropic effective medium theory.
研究成果
The anisotropic EMT model provides a quick and computationally inexpensive method to predict the fundamental LSPR modes of ITO NRAs, useful for the design of novel infrared active devices.
研究不足
The model does not account for the detailed rod shape and arrangement, and thus cannot calculate Bragg diffraction associated with periodic geometric grating and other resonances caused by a noncylindrical rod shape.
1：Experimental Design and Method Selection:
The study uses three-layer Fresnel equations combined with Maxwell-Garnett approximation to model the IR plasmonic properties of ITO nanorods. The anisotropic nanorod layer is treated as a layer with an effective dielectric constant.
2：Sample Selection and Data Sources:
The study considers three typical ITO structures: vertically aligned ITO NRAs, horizontally aligned ITO NRAs, and tilted ITO NRAs.
3：List of Experimental Equipment and Materials:
The study involves the use of ITO nanorods with varying lengths, spacings, and tilt angles.
4：Experimental Procedures and Operational Workflow:
The methodology involves calculating the effective dielectric constant of the ITO NRA layer and predicting the optical properties under different polarization incidences.
5：Data Analysis Methods:
The study compares the calculated results with experimental data and FDTD simulation results to validate the model.
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