The effect of adsorption of Na on Cu(110) surface states probed by second harmonic generation

Dounce, Susan M.; Dai, Hai‐Lung

doi:10.1016/j.susc.2005.03.047

Cited by 2 publications

(1 citation statement)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The calculation of ijm ͑2͒ could however be further refined to yield a quantitatively better agreement with the data by explicitly including the adsorbate-induced broadening of the IP state. 32,[42][43][44][45] Inserting a Cs-coveragedependent broadening of ␥ l Љ →l with a constant rate of 4.5 eV/ML, a value fully compatible with available experimental and theoretical values, 32,46 yields in fact the gray curve in the bottom panel of Fig. 4, which reproduces the experimental data significantly better.…”

Section: ͑1͒supporting

confidence: 63%

Band structure effects in surface second harmonic generation: The case of Cu(001)

et al. 2009

View full text Add to dashboard Cite

We have performed a study of simultaneous nonlinear optical second harmonic generation ͑SHG͒ and angle-resolved nonlinear photoemission at the Cu͑001͒ surface excited by fundamental photon energies near 3 eV. At these excitation energies, we identify a dominant contribution to the SHG signal that is determined by a two-photon resonance between the d bands and the n = 1 image-potential state at the Cu͑001͒ surface. The near-resonant behavior of SHG and nonlinear photoemission is studied via Cs adsorption, which allows to systematically lower the work function and thus the reference vacuum level of the image potential. Comparison of the angle-resolved photoemission signal, arising from a restricted region of electronic momentum space, with the simultaneous optical SHG signal allows to identify an additional contribution of electronic states with nonzero surface-parallel momentum to the SHG signal enhancements. A simple model accounting for the observed behavior is developed and the implications for the quantitative understanding of SHG are discussed.

show abstract