By optical spectroscopy we have observed the single-electron charging effect of a small Au particle at room temperature. The high energy cut-off ℏω-max$/ of visible light emitted by a sample under a scanning tunneling microscope (STM) is ordinarily equal to eV0 where V0 is the tip-sample bias voltage. However, when the electron is injected into a small Au particle (diameter approx.6 nm) that is quasi-isolated on a thin insulator layer, the cut-off energy shifts below eV0. The physics that underlies the observed optical effect is common with that of previously observed Coulomb blockade and Coulomb staircase.
|Journal||Japanese Journal of Applied Physics, Part 2: Letters|
|Issue number||2 A|
|Publication status||Published - 1996 Jan 1|
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
- Physics and Astronomy(all)