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Electromagnetic Coupling on an Atomic Scale



Javier Aizpurua, G Hoffman, S P. Apell, R Berndt


Light emission from a scanning tunneling microscope is used to investigatethe electromagnetic coupling (EMC) of a metal tip and a metal sample.Subatomic scale modifications of the tip-sample region cause spectralshifts of the fluorescence as demonstrated for a monoatomic step and byvariation of the tip-sample distance. For sharp tipsthe EMC is confined to a lateral range of a few nm. The results areconsistent with model calculations of the electromagnetic response of anappropriate tip-sample geometry.
Physical Review Letters
No. 15


electromagnetic interaction, fluorescence, nanostructures, scanning tunneling microscopy, surface modes


Aizpurua, J. , Hoffman, G. , Apell, S. and Berndt, R. (2002), Electromagnetic Coupling on an Atomic Scale, Physical Review Letters (Accessed April 24, 2024)
Created October 1, 2002, Updated February 17, 2017