Optical Second-Harmonic Generation Studies Of Ag Layer And 3-D Cluster Growth On Cu(110)

Mark A. Hoffbauer; Ross E Muenchausen

doi:10.1117/12.951614

15 August 1989 Optical Second-Harmonic Generation Studies Of Ag Layer And 3-D Cluster Growth On Cu(110)

Mark A. Hoffbauer, Ross E Muenchausen

Proceedings Volume 1056, Photochemistry in Thin Films; (1989) https://doi.org/10.1117/12.951614
Event: OE/LASE '89, 1989, Los Angeles, CA, United States

Abstract

Optical surface second-harmonic generation (SHG) has been used to investigate the nucleation and growth of Ag layers and 3-D Ag nanoclusters (<10 monolayers thick) on a clean Cu(110) single-crystal surface. The surface SH intensity undergoes large changes below coverages corresponding to one Ag(111) monolayer that were highly temperature dependent. At surface temperatures above 300 K, the SH intensity increased three-fold due to the nucleation and growth of three-dimensional Ag nanoclusters on a Ag(111) monolayer thick template. Comparisons of the surface SH intensity and polarization dependences with other surface analysis techniques indicate that SHG provides a strong fingerprint for both changes in the interfacial electronic valence band structure of the surface and the nucleation and growth of Ag nanoclusters. These results are discussed in terms of a simple model relating changes in the SH intensity to changes in surface morphology by separating the coverage dependence of the nonlinear susceptibility of the interface into regions dominated by changes in either the interfacial electronic valence band structure, or structurally enhanced local-field contributions to SHG.

Citation Download Citation

Mark A. Hoffbauer and Ross E Muenchausen "Optical Second-Harmonic Generation Studies Of Ag Layer And 3-D Cluster Growth On Cu(110)", Proc. SPIE 1056, Photochemistry in Thin Films, (15 August 1989); https://doi.org/10.1117/12.951614

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