[16a-P08-1~12] 3.12 Nanoscale optical science and near-field optics

[16a-P08-4] Excitation spectroscopy at a tunnel junction between ferromagnetic Fe and semiconducting GaAs using scanning tunneling luminescence

〇Shunji Yamamoto¹, Hiroshi Imada¹, Yousoo Kim¹ (1.RIKEN)

Keywords:Luminescence spectroscopy, Energy excitation, plasmon

Scanning tunneling microscopy (STM) enables low-energy excitation spectroscopy at the single-atom level, and further measurements for higher energy excitation can be realized by performing luminescence spectroscopy simultaneously, so-called scanning tunneling luminescence (STL). Here we present luminescence spectra at a tunnel junction between ferromagnetic Fe tip and p-type semiconductor GaAs by using the STL. The spectra show several structures that may reflect both tip and sample electronic states, as well as plasmon-induced luminescence. In this talk, we will discuss the details.