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O: Fachverband Oberflächenphysik

O 60: Poster Session IV (Solid/liquid interfaces; Semiconductors; Oxides and insulators; Graphene; Plasmonics and nanooptics; Electronic Structure; Surface chemical reactions; Heterogeneous catalysis)

O 60.93: Poster

Mittwoch, 16. März 2011, 17:30–21:00, P4

Second Harmonic Generation and Two Photon Photoemission from Cs on Cu(111) — •Mariusz Pazgan, Cheng-Tien Chiang, Aimo Winkelmann, and Jürgen Kirschner — Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, D-06120 Halle (Saale), Germany

We report on a combined study of nonlinear-optical Second Harmonic Generation (SHG) and Two-Photon Photoemission (2PPE) from the system of Cs on Cu(111). The SHG and photoemission signals were simultaneously measured during real time deposition of Cs atoms on Cu(111) surface. Clear resonances in 2PPE and SHG were observed in measurements at 140K and 300K. We interpreted our results by optical transitions between the occupied Cu(111) Shockley surface state band and the unoccupied Cs anti-bonding state at the photon energy of 3.07eV used in the experiment.