研究目的
Investigating the coupling strength between plasmonic modes and electromagnetic radiation in metallic photonic crystals and its application in designing highly sensitive plasmonic sensor devices.
研究成果
The coupling strength in metallic photonic crystals can be controlled by varying the spacer layer thickness, with the coupling strength linearly dependent on the electric field amplitude of the waveguide mode. This method enables the design of highly sensitive plasmonic sensor devices and opens possibilities for applications in nonlinear optics and slow light propagation.
研究不足
The study is limited by the precision of sample fabrication and the assumption of constant refractive indices for materials. Deviations between experimental and simulated data may arise from sample imperfections or slightly different spacer layer thicknesses.
1：Experimental Design and Method Selection:
The study involves varying the thickness of a dielectric spacer layer between metallic nanowires and a waveguide layer to control the coupling strength. The coupling strength is determined by fitting an effective energy matrix to the resonance peaks.
2：Sample Selection and Data Sources:
Samples consist of a glass substrate with an ITO waveguide layer and a gold grating on top, with a silicon dioxide spacer layer of varying thicknesses.
3：List of Experimental Equipment and Materials:
A microscope objective (Zeiss, A-Plan, 10×, NA=0.25), spectrometer (Acton Spectra Pro 500i), CCD camera, and electron beam lithography for sample fabrication.
4：25), spectrometer (Acton Spectra Pro 500i), CCD camera, and electron beam lithography for sample fabrication.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: Samples were fabricated by evaporating SiO2 onto ITO substrates, followed by placing gold gratings using electron beam lithography. Extinction spectra were measured using linearly polarized white light.
5：Data Analysis Methods:
The scattering-matrix method was used for simulations, and the coupling strength was analyzed by fitting an effective energy matrix to the experimental data.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
