INVESTIGADORES
BRAGAS Andrea Veronica
artículos
Título:
Laser field enhancement at the Scanning Tunneling Microscope junction measured by optical rectification
Autor/es:
A. V. BRAGAS; S. M. LANDI; O. E. MARTÍNEZ
Revista:
APPLIED PHYSICS LETTERS
Editorial:
AMER INST PHYSICS
Referencias:
Año: 1998 vol. 72 p. 2075 - 2077
ISSN:
0003-6951
Resumen:
n this letter we report the measurement of the field enhancement at the
tip of a scanning tunneling microscope, by means of the detection of
the optical rectification current. A field enhancement factor between
1000 and 2000 is obtained for highly oriented pyrolytic graphite and
between 300 and 600 for gold. Field enhancement factors found are
strongly dependent on the particular tip used. The magnitude of the
emitted light at the field enhanced region, calculated from the
measured optical voltage, could be easily detected by a simple
photodiode.