Accession Number : AD0717898

Title :   The Excitation Mechanisms of Rare Earth Emissions in the Thioindates,

Corporate Author : SIGNALS RESEARCH AND DEVELOPMENT ESTABLISHMENT CHRISTCHURCH (ENGLAND)

Personal Author(s) : Brown,M. R. ; Shand,W. A.

Report Date : JUN 1970

Pagination or Media Count : 20

Abstract : The report considers the excitation processes for Er(3+) emissions in the thioindate lattices CdIn2S4, ZnIn2S4 when excited by Stokes and anti-Stokes modes. It has been found that in the anti-Stokes case the lattice itself is of little importance since the processes only involve the interactions between the rare earth ions. Under Stokes excitation, however, the lattice is all important since the processes involve the non-radiative transfer of the energy, provided by the recombination of electron-hole pairs, to the rare earth ion. In this case there are competing mechanisms for the recombination energy so the efficiency of excitation of the Er(3+) ions will depend on the balance between these competing mechanisms and thereby depend on the host lattice. (Author)

Descriptors :   (*EUROPIUM, *ELECTRON TRANSITIONS), (*RARE EARTH ELEMENTS, ELECTRON TRANSITIONS), CRYSTAL LATTICES, INDIUM COMPOUNDS, SULFIDES, CADMIUM COMPOUNDS, ZINC COMPOUNDS, EXCITATION, FLUORESCENCE

Subject Categories : Physical Chemistry
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE