ISSN:
1432-0649
Keywords:
PACS:42.65.Re, 73.40.Gk, 79.60.-i
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract. Direct illumination of the tunneling gap in an ultrahigh vacuum scanning tunneling microscope with ultrashort pump-probe laser pulses may offer ultimate spatial and temporal resolution in surface experiments. The electronic bandwidth of the tunneling gap ( $〈$ 1 THz) does not limit the time resolution. Our experiments show that multiphoton photoelectron emission from the sample limits the application of this detection scheme at high laser fluence. However, a substrate specific pump-probe effect in the photoelectron yield with femtosecond transients is observed on Tantalum and on GaAs(110) surfaces.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s003400050173
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