T. Srinivasanrao et al., ROLE OF OPTICAL-FIELD IN PHOTOEMISSION FROM COPPER, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 340(1), 1994, pp. 186-189
Photoemission from a diamond turned copper mirror with laser beams of
intensity 10(11) W/cm2 at the photon energy of 2 eV and pulse duration
of approximately 300 fs indicates that the electric field associated
with the photons enhances the photoemission. At the optimum incident a
ngle, the electron yield with p-polarized light was 75 times larger th
an that with s-polarized light and four times larger than that at norm
al incidence for a constant energy. These enhancements were underestim
ated by the changes in the absorption and were attributed in this pape
r to the optical field effect.