Author/Authors :
H. Sano and N. Kunimatsu، نويسنده , , M. Miyaoka، نويسنده , , T. Iimori )، نويسنده , , D. Sakiba، نويسنده , , K. Nakatsuji، نويسنده , , W. Wolf، نويسنده , , R. Podloucky، نويسنده , , N. Kawamura، نويسنده , , G. Mizutani، نويسنده , , F. Komori، نويسنده ,
Abstract :
Optical second harmonic generation (SHG) from the clean and nitrogen adsorbed Cu(0 0 1) surfaces has been studied. The observed SHG signal was largely enhanced by the nitrogen adsorption. Surface SH responses of the Cu(0 0 1) surfaces were also calculated based on an ab initio approach. The calculations qualitatively reproduced the experimental results. It is suggested that the N-derived surface states are the initial states of the optical transitions for the enhanced SHG.
Keywords :
Second harmonic generation , Nitrogen adsorption , Angle resolved photoemission , Ab initio calculation , Cu(0 0 1) surface
