Photon Emission at Molecular Resolution Induced by a Scanning Tunneling Microscope

The tip-surface region of a scanning tunneling microscope (STM) emits light when the energy of the tunneling electrons is sufficient to excite luminescent processes. These processes provide access to dynamic aspects of the local electronic structure that are not directly amenable to conventional STM...

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Veröffentlicht in:	Science (American Association for the Advancement of Science) 1993-11, Vol.262 (5138), p.1425-1427
Hauptverfasser:	Berndt, R., Gaisch, R., Gimzewski, J. K., Reihl, B., Schlittler, R. R., Schneider, W. D., Tschudy, M.
Format:	Artikel
Sprache:	eng
Schlagworte:	Electric current Electric potential Electron emission Electron tunneling Electron, positron and ion microscopes, electron diffractometers and related techniques Electrons Exact sciences and technology Instruments, apparatus, components and techniques common to several branches of physics and astronomy Metal surfaces Microscopes Molecules Photons Physics Scanning tunneling microscopy
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Beschreibung
Zusammenfassung:	The tip-surface region of a scanning tunneling microscope (STM) emits light when the energy of the tunneling electrons is sufficient to excite luminescent processes. These processes provide access to dynamic aspects of the local electronic structure that are not directly amenable to conventional STM experiments. From monolayer films of carbon-60 fullerenes on gold(110) surfaces, intense emission is observed when the STM tip is placed above an individual molecule. The diameter of this emission spot associated with carbon-60 is approximately 4 angstroms. These results demonstrate the highest spatial resolution of light emission to date with a scanning probe technique.
ISSN:	0036-8075 1095-9203
DOI:	10.1126/science.262.5138.1425