Author/Authors :
Sano، نويسنده , , H. and Miyaoka، نويسنده , , H. and Kuze، نويسنده , , T. and Mori، نويسنده , , H. and Mizutani، نويسنده , , G. and Otsuka، نويسنده , , N. and Terano، نويسنده , , M.، نويسنده ,
Abstract :
We have observed lattice vibrations of MgCl2 thin films for the first time by surface enhanced Raman scattering induced by a silver underlayer. Two Raman active bands of the MgCl2 crystal, Eg and A1g, were observed at ∼160 and 240 cm−1. The band width of A1g mode was about 20 cm−1. The Raman spectra indicate that the lattice structure of the evaporated MgCl2 film is well ordered like that of a polycrystal. We have also measured Raman intensity of A1g mode, varying the film thickness from 0.6 to 7 nm. This film thickness dependence indicates that the Raman enhancement occurs within a very short distance from the substrate.
