研究目的
Investigating the manipulation of Smith-Purcell radiation (SPR) by electron-bunch excitation of localized surface plasmon (LSP) of gold (Au) disc arrays on Au substrate.
研究成果
The study concludes that SPR can be enhanced and controlled by LSPs on metal disks if their frequencies are within the emission bands of SPRs. The emission properties of SPR can be manipulated by electron excited LSP mode of Au disc, offering potential applications in optical imaging, holography, cryptography, and tunable visible light source.
研究不足
The study is limited to simulation results and does not include experimental validation. The effects of excited LSPs on SPR for metallic periodic disk arrays have not been explored before this work.
1：Experimental Design and Method Selection:
The study uses FDTD simulation to investigate the manipulation of SPR by electron-bunch excitation of LSP of Au disc arrays on Au substrate.
2：Sample Selection and Data Sources:
The model consists of an electron bunch passing through a gold substrate with periodic Au disc arrays.
3：List of Experimental Equipment and Materials:
The simulation uses the FDTD electromagnetic software Lumerical.
4：Experimental Procedures and Operational Workflow:
The electron bunch is represented by a series of dipoles with phase delay related to the electron velocity. The simulation is performed in a three-dimensional Cartesian coordinate system.
5：Data Analysis Methods:
The relationship between the emission wavelength and angle of SPR is analyzed using a specific equation.
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