Momentum-resolved EELS and CL study on 1D-plasmonic crystal prepared by FIB method
Akira Yasuhara1, Masateru Shibata1, Wakaba Yamamoto1
1JEOL Ltd, 3-1-2 Musashino, Akishima, Tokyo 196-8558, Japan.
Microscopy (Oxford, England)
|May 4, 2024
Summary
This study uses electron energy-loss spectroscopy (EELS) and cathodoluminescence (CL) to analyze a one-dimensional plasmonic crystal. The techniques reveal surface plasmon polaritons and local modes, offering insights into optical properties.
Area of Science:
- Condensed matter physics
- Materials science
- Nanophotonics
Background:
- Plasmonic crystals offer unique optical properties due to their nanostructure.
- Characterizing these properties requires advanced spectroscopic techniques.
Purpose of the Study:
- To investigate the optical properties of a one-dimensional plasmonic crystal.
- To demonstrate the synergistic use of electron energy-loss spectroscopy (EELS) and cathodoluminescence (CL).
Main Methods:
- Fabrication of a plasmonic crystal from aluminum grains using focused ion beam milling.
- Momentum-resolved electron energy-loss spectroscopy (EELS) for dispersion curve analysis.
- Momentum-resolved cathodoluminescence (CL) mapping for mode identification.
Main Results:
- EELS confirmed surface plasmon polaritons and local modes outside the light cone.
- CL mapping identified these same plasmonic features.
- Both techniques provided complementary optical information.
Conclusions:
- The combined EELS and CL approach provides comprehensive insights into plasmonic nanostructures.
- This synergetic method is valuable for analyzing both radiative and non-radiative optical properties.
- The study highlights the potential for detailed analysis of plasmonic and photonic structures.
