Description
Oblique incidence ion sputtering has become a widely used method for the creation of highly regular patterns of lines and dots. On a Ag(001) surface oblique incidence sputtering creates a ripple pattern that exhibits plasmonic features. The photon energy of the plasmonic feature depends on the ripple periodicity. The development of these anisotropic features was measured in-situ with the optical technique Reflection Anisotropy Spectroscopy (RAS) for 2 keV Ar ions with a flux of a few µ A/cm2 in a temperature range of 300 - 420K. With RAS, a periodicity of ripples above 200 nm is measured by a shift in photon energy of the plasmon resonance. Features with a smaller periodicity show a plasmon resonance around 3.65 eV. The Rayleigh-Rice description for scattering from a slightly rough surface enables to relate the measured plasmonic feature quantitatively to the ripple’s rms, wavelength and wavelength distribution. Ripple patterns created with ions at 70∘ and 80∘ polar angles of incidence are compared. High resolution LEED measurements after sputtering are used to determine the facet angles of the created ripples.| Period | 29 Feb 2008 |
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| Event title | DPG Frühjahrstagung 2008 Berlin: (DPG Spring Meeting) |
| Event type | Conference |
| Organiser | Deutsche Physikalische Gesellschaft |
| Location | Berlin, GermanyShow on map |
| Degree of Recognition | International |
Keywords
- METIS-251315