Hohenester Ulrich, Ditlbacher Harald, Krenn Joachim R
Institut für Physik, Karl-Franzens-Universität Graz, Universitätsplatz 5, 8010 Graz, Austria.
Phys Rev Lett. 2009 Sep 4;103(10):106801. doi: 10.1103/PhysRevLett.103.106801. Epub 2009 Aug 31.
We investigate electron-energy-loss spectroscopy (EELS) on metallic nanoparticles, through simulations, and provide a comprehensive comparison between EELS and the photonic local density of states (LDOS). Most importantly, we show that there is no direct link between EELS and LDOS maps, and that EELS can even be blind to hot spots in the gap between coupled nanoparticles. Although intimately related, the two quantities provide complementary information. This finding is in marked contrast to recently reported results.
我们通过模拟研究了金属纳米颗粒的电子能量损失谱（EELS），并对EELS与光子局域态密度（LDOS）进行了全面比较。最重要的是，我们表明EELS与LDOS图谱之间没有直接联系，并且EELS甚至可能对耦合纳米颗粒之间间隙中的热点不敏感。尽管密切相关，但这两个量提供了互补信息。这一发现与最近报道的结果形成了鲜明对比鲜明对比。
