研究目的
Investigating the enhancement of Raman scattering using a bimetallic waveguide-coupled surface plasmon resonance (WCSPR) configuration based on evanescent field excitation.
研究成果
The WCSPR configuration can achieve narrower angular resonance curves, longer penetration depths, and stronger electric fields compared to the conventional SPR configuration. The enhancement factor of SERS when using the WCSPR configuration was found to be as high as 6.2×107, demonstrating its potential for high-efficiency light harvesting and radiation in plasmonic devices.
研究不足
The study focuses on the enhancement of Raman scattering using a specific WCSPR configuration and does not explore other potential configurations or materials. The practical application of this configuration in real-world scenarios is not discussed.
1：Experimental Design and Method Selection:
A five-phase WCSPR configuration was designed and fabricated to enhance the intensity and penetration depth of the evanescent field. The configuration was composed of a K9 prism/inner Ag film/MgF2 film/outer Ag film/water structure.
2：Sample Selection and Data Sources:
A Raman probe molecule, 4-mercaptopyridine (4-Mpy), was assembled on the bare Ag surfaces for SERS measurements.
3：List of Experimental Equipment and Materials:
An in-house-built angle-dependent SPR-SERS microspectrometer was used, including a laser, lenses, a polarizer, a photodiode, an inverted microscope, a CCD imaging camera, and a spectrometer.
4：Experimental Procedures and Operational Workflow:
The SPR curves and incident angle-dependent SERS spectra of 4-Mpy were measured simultaneously in water.
5：Data Analysis Methods:
The enhancement factor of 4-Mpy was calculated using the WCSPR configuration, and the SERS spectra were analyzed.
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