Optical excitation spectra of rare-gas atoms physisorbed on metal surfaces

1988 ◽  
Vol 47 (2) ◽  
pp. 157-165 ◽  
Author(s):  
C. Mavroyannis
Keyword(s):  
Metal Surfaces ◽  
Optical Excitation ◽  
Rare Gas ◽  
Excitation Spectra ◽  
Rare Gas Atoms

Adsorbate spectra of rare-gas atoms on metal surfaces

1988 ◽  
Vol 66 (4) ◽  
pp. 741-751 ◽  
Author(s):  
Constantine Mavroyannis
Keyword(s):  
Excited State ◽  
Surface Plasmons ◽  
Metal Surfaces ◽  
Stimulated Emission ◽  
Spectral Lines ◽  
Rare Gas ◽  
Excitation Spectra ◽  
Rare Gas Atoms ◽  
Low Coverage ◽  
Symmetric And Antisymmetric Modes

The optical excitation spectra of neutral rare-gas atoms physisorbed on metal surfaces have been considered. Emphasis has been given to the dynamic effects of the surface plasmons on the lifetimes of the adsorbed atoms. At low coverage and when the damping of the surface plasmons is much greater than the effective radiative damping, the spectral functions of the symmetric and antisymmetric modes consist of asymmetric Lorentzian lines, whose asymmetry depends on the strength of the surface plasmons. At this limit the relative intensities of the symmetric and antisymmetric modes take positive and negative values describing the physical processes of absorption (attenuation) and stimulated emission (amplification), respectively. Hence, the occasional disappearance of the spectral lines of the optical absorption is due to a cancellation process, which takes place between the frequency profiles arising from two nearby excited states of the adsorbed atom. The red shifted peak of the symmetric mode of the higher excited state and the blue shifted peak of the antisymmetric mode of the lower excited state of the atom cancel each other out provided that their frequency profiles nearly coincide. This may be a possible explanation of the persistence-extinction phenomenon that has been observed for a number of rare-gas substrate systems in the low coverage limit, where it has been proposed that a charge-transfer instability exists. Numerical results indicate that the peaks of excited Xe on Al and excited Kr on Au vanish in the low coverage limit.

The interaction of rare gas atoms with metal surfaces: a scattering theory approach

1992 ◽  
Vol 268 (1-3) ◽  
pp. 432-456 ◽  
Author(s):  
A. Chizmeshya ◽  
E. Zaremba
Keyword(s):  
Scattering Theory ◽  
Metal Surfaces ◽  
Rare Gas ◽  
Theory Approach ◽  
Rare Gas Atoms

Theory of optical excitation of adsorbed rare gas atoms

1985 ◽  
Vol 151 (2-3) ◽  
pp. A86
Author(s):  
Masaru Tsukada ◽  
Wilhelm Brenig
Keyword(s):  
Optical Excitation ◽  
Rare Gas ◽  
Rare Gas Atoms

Configurational description of rare gas atoms adsorbed on metal surfaces

1982 ◽  
Vol 15 (32) ◽  
pp. L1169-L1175 ◽  
Author(s):  
C P Flynn ◽  
J E Cunningham
Keyword(s):  
Metal Surfaces ◽  
Rare Gas ◽  
Rare Gas Atoms

Theory of optical excitation of adsorbed rare gas atoms

1985 ◽  
Vol 151 (2-3) ◽  
pp. 503-520 ◽  
Author(s):  
Masaru Tsukada ◽  
Wilhelm Brenig
Keyword(s):  
Optical Excitation ◽  
Rare Gas ◽  
Rare Gas Atoms
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