We observe high contrast scanning tunneling microscope (STM)-induced luminescence maps from isolated lithographically prepared gold dots on silicon using gold and tungsten STM tips. We observe geometry-related light emission with photon intensity stronger at protrusions than in the valleys. The light intensity dependence on tunnel voltage bias agrees with theoretical predictions. A noticeable variation of onset bias with the tip material is observed.
- Scanning tunneling microscopy
- Surface waves
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Condensed Matter Physics
- Surfaces and Interfaces