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STM-induced light emission enhanced by weakly coupled organic ad-layers
- Publication Year :
- 2018
-
Abstract
- We analyze the light emission induced by the tunneling current flowing in a scanning tunneling microscopy experiment. In particular, we study the influence of organic ad-layers on the light emission on the initial monolayer of bismuth (Bi) on Cu(111) in comparison to the well-known case of organic ad-layers on Ag(111). On the Bi/Cu(111)-surface, we find that the scanning tunneling microscopy-induced light emission is considerably enhanced if an organic layer, e.g., the fullerene C60 or the perylene derivate perylene-tetracarboxylic-dianhydride, is introduced into the tip-sample junction. The enhancement can be correlated with a peculiarly weak interaction between the adsorbed molecules and the underlying Bi/Cu(111) substrate as compared to the Ag(111) substrate. This allows us to efficiently enhance and tune the coupling of the tunneling current to localized excitations of the tip-sample junction, which in turn couple to radiative decay channels.
- Subjects :
- Fullerene
Materials science
Physics and Astronomy (miscellaneous)
chemistry.chemical_element
02 engineering and technology
Substrate (electronics)
Physik (inkl. Astronomie)
021001 nanoscience & nanotechnology
01 natural sciences
Molecular physics
Bismuth
law.invention
chemistry.chemical_compound
chemistry
law
0103 physical sciences
Monolayer
Light emission
Scanning tunneling microscope
010306 general physics
0210 nano-technology
Perylene
Quantum tunnelling
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....89a0028d0a8ca0c7645564efa7868724