研究目的
Investigating the second harmonic generation (SHG) of vertical and planar split-ring resonators (SRRs) that are broken centro-symmetry configurations at the interface of metal surface and air.
研究成果
VSRRs demonstrate a 2.6 times stronger SH signal than PSRRs, attributed to better coupling with incident fields and reduced field leakage. The study highlights the potential of VSRRs in nonlinear light manipulation and photonics applications.
研究不足
The study is limited to the specific configurations of VSRRs and PSRRs and their SHG properties under certain conditions. Further optimization in sizes and fabrication techniques is suggested for better nonlinear efficiency.
1：Experimental Design and Method Selection:
The study involves numerical simulation and experimental investigation of SHG in vertical and planar SRRs using COMSOL Multiphysics software based on the finite element method (FEM).
2：Sample Selection and Data Sources:
Gold VSRRs and PSRRs deposited on a glass substrate with identical structural dimensions and periods were used.
3：List of Experimental Equipment and Materials:
E-beam lithography and lift-off process for fabrication, tunable mode-locked Ti-sapphire ultrafast laser for optical pumping, and various optical measurement tools.
4：Experimental Procedures and Operational Workflow:
Fabrication of SRRs, optical pumping at resonant wavelengths, and collection of SH signals for analysis.
5：Data Analysis Methods:
Analysis of SH signals and comparison between VSRRs and PSRRs.
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