An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
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.
Aizpurua, J.
, Hoffman, G.
, Apell, S.
and Berndt, R.
(2002),
Electromagnetic Coupling on an Atomic Scale, Physical Review Letters
(Accessed May 28, 2023)