0000000000814096

AUTHOR

Stephan Herminghaus

showing 3 related works from this author

Wetting behavior of solid hydrogen films

1996

We have studied the dewetting of quench-condensed solid hydrogen films on bare and Ne plated Ag substrates. Information about the morphology of the films during the dewetting process is obtained from measurements of photoelectron tunneling through the films and complementary surface plasmon resonance data. Plating the Ag substrate with Ne films of various thickness allows to tune the strength of the van der Waals interaction with the hydrogen and thus to change the H2 films from a state of incomplete to complete wetting.

Materials scienceHydrogenGeneral Physics and Astronomychemistry.chemical_elementNanotechnologySubstrate (electronics)symbols.namesakeChemical engineeringchemistrySolid hydrogenPlatingsymbolsWettingDewettingvan der Waals forceSurface plasmon resonanceCzechoslovak Journal of Physics
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Thermally induced emission of light from a metallic diffraction grating, mediated by surface plasmons

1999

The angular emission of light of wavelength 710 and 810 nm from a gold diffraction grating was studied at about 700°C. A peak in the emission was found for defined angles. This contribution is purely TM-polarised and is attributed to thermally excited surface plasmons, coupled to light waves by the diffraction grating.

Materials sciencebusiness.industrySurface plasmonPhysics::OpticsAcousto-opticsElectromagnetically induced gratingGratingAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic MaterialsWavelengthUltrasonic gratingOpticsLight emissionElectrical and Electronic EngineeringPhysical and Theoretical ChemistrybusinessDiffraction gratingOptics Communications
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Hydrogen and helium films as model systems of wetting

1997

Optical experiments on the wetting properties of liquid 4He and molecular hydrogen are reviewed. Hydrogen films on noble metal surfaces serve as model systems for studying triple point wetting, a continuous transition between wetting and non-wetting. By means of optically excited surface plasmons, the adsorbed film thickness for temperatures around, and far below, the bulk melting temperature is measured, and the physical mechanisms responsible for the transition are elucidated. Possible applications for other experiments in pure and applied research are discussed. Thin films are droplets of liquid helium are studied on cesium surfaces, on which there is a first order wetting transition. Ou…

Materials scienceHydrogenCondensed matter physicsLiquid heliumTriple pointsurface plasmonSurface plasmonquantium liquidsGeneral Physics and Astronomychemistry.chemical_elementWettinglaw.inventionCondensed Matter::Soft Condensed MatterPhysics::Fluid DynamicschemistryWetting transitionlawChemical physicsddc:530DewettingWettingHeliumAnnalen der Physik
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