1.
Opt Lett
; 42(22): 4585-4588, 2017 Nov 15.
Artigo
em Inglês
| MEDLINE
| ID: mdl-29140318
RESUMO
The light emission from a tunneling junction induced by tunneling electrons has been studied around the cutoff at hν=eVt. The emitted photons are found to exceed the excitation energy provided by the energy of the tunneling electrons. The experiments have been performed by a low- temperature scanning tunneling microscope at 80 K for an Ag(111) surface and an Ag-covered PtIr tip. A detailed analysis of the emission spectra reveals that the findings cannot be explained by the thermal broadening of the electron Fermi distribution alone. However, a correct description is found if a finite lifetime of the excited states in the range of 30-80 fs is included.
2.
3.
Nature
; 210(5038): 780-3, 1966 May 21.
Artigo
em Inglês
| MEDLINE
| ID: mdl-5334987