Atom-Resolved Luminescence of Si(111)-$7{\times}7$ Induced by Scanning Tunneling Microscopy
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概要
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Photon emission induced by scanning tunneling microscopy (STM), i.e., scanning tunneling luminescence (STL), is widely believed to reveal the inherent optical properties of nanostructures with high spatial resolution comparable to that of STM. We investigated STL of Si(111)-$7{\times}7$ using silver STM tips. The photon emission via inherent electronic transitions of Si(111)-$7{\times}7$ is strongly enhanced by surface plasmon localized in the tunnel junction, allowing the surface atomic configurations to be clearly visualized by luminescence mapping. The STL maps suggest that the local optical properties of non-equivalent adatoms are different.
- 2010-04-25
論文 | ランダム
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