Yasuhara Akira, Shibata Masateru, Yamamoto Wakaba, Machfuudzoh Izzah, Yanagimoto Sotatsu, Sannomiya Takumi
JEOL Ltd, 3-1-2 Musashino, Akishima, Tokyo 196-8558, Japan.
Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 4259 Nagatsuta, Midoriku, Yokohama, Tokyo 226-8503, Japan.
Microscopy (Oxf). 2024 Dec 5;73(6):473-480. doi: 10.1093/jmicro/dfae022.
We investigate a one-dimensional plasmonic crystal using momentum-resolved electron energy-loss spectroscopy (EELS) and cathodoluminescence (CL) techniques, which are complementary in terms of available optical information. The plasmonic crystal sample is fabricated from large aluminum grains through the focused ion beam method. This approach allows curving nanostructures with high crystallinity, providing platforms for detailed analysis of plasmonic nanostructures using both EELS and CL. The momentum-resolved EELS visualizes dispersion curves outside the light cone, confirming the existence of the surface plasmon polaritons and local modes, while the momentum-resolved CL mapping analysis identified these surface plasmon polaritons and local modes. Such synergetic approach of two electron-beam techniques offers full insights into both radiative and non-radiative optical properties in plasmonic or photonic structures.
我们使用动量分辨电子能量损失谱（EELS）和阴极发光（CL）技术研究一维等离子体晶体，这两种技术在可用光学信息方面具有互补性。等离子体晶体样品是通过聚焦离子束方法由大铝晶粒制成的。这种方法允许制造具有高结晶度的弯曲纳米结构，为使用EELS和CL对等离子体纳米结构进行详细分析提供了平台。动量分辨EELS可视化了光锥外的色散曲线，证实了表面等离激元极化子和局域模的存在，而动量分辨CL映射分析则识别出了这些表面等离激元极化子和局域模。这两种电子束技术的协同方法为深入了解等离子体或光子结构中的辐射和非辐射光学特性提供了全面的视角。
