INVESTIGADORES
MARTINEZ Oscar Eduardo
artículos
Título:
Laser field enhancement at the scanning tunneling microscope junction measured by optical rectification
Autor/es:
ANDREA V. BRAGAS; S. M. LANDI; O.E. MARTÍNEZ
Revista:
APPLIED PHYSICS LETTERS
Editorial:
AMER INST PHYSICS
Referencias:
Lugar: American Institute of Physics; Año: 1998 vol. 72 p. 2075 - 2077
ISSN:
0003-6951
Resumen:
In 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. (C) 1998 American Institute of Physics.
