Visualization of plasmon wave functions by a scanning tunneling electron microscop

在这个项目中，我们提出了通过电子注入来激发等离子体激元，并用扫描隧道电子显微镜来可视化等离子体激元的波函数。该显微镜是在扫描近场光学显微镜的基础上发展起来的。该显微镜可以在地形、光学和隧道电子图像上获得小于几十nm的空间分辨率。我们发现，在金薄膜的隧道电子图像中可以看到一个特征的空间特征。或者，我们使用扫描近场光学显微镜来可视化在各种纳米结构中激发的等离子体波函数。

In this project, we proposed to excite plasmons by the electron injection and to visualize the plasmon wavefunctions by a scanning tunneling electron microscope. We developed the microscope based on the scanning near-field optical microscope. The microsope can achieve a spatial resolution less than a few tens nm in topography, optical, and tunnel electron images. We found that a characteristic spatial feature was visualized in the tunnel electron image for the gold thin film. Alternatively, we visualize plasmon wavefunctions excited in various nanostructures by using the scanning near-field optical microscope.