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|Title:||Optical properties of an electron bound to a double well potential in a dielectric|
|Author(s):||Aegerter, Michel A.|
Lüty, Fritz W.
|Year of Publication:||1970|
|OPUS Source:||Proceedings of the International Conference on Luminescence : held at the Univ. of Delaware, Newark, aug. 25-29, 1969 / ed. Ferd Williams. - Amsterdam : North-Holland, 1970. - (Journal of luminescence ; 1/2), S. 624-632|
|SWD key words:||Absorption|
|DDC notations:||500 Science|
|Publikation type:||Conference Paper|
|Abstract:||The absorption and emission properties of F2+ center in KCl (2 adjacent anion vacancies which bind 1 electron) were investigated between 0.6 and 5 eV by using an optically aligned center system. Energy positions, level degeneracies, polarization behavior and oscillator strengths of 8 absorption transitions were found in close agreement to the calculated states of the H2+ molecular ion corrected for a single dielectric constant and the proper separation between the 2 effective positive charges. Excitation of the lowest 2póu state at 1.38 ì leads with temperature independent quantum efficiency to a Stokes shifted emission at 1.67 ì almost in mirror symmetry with the zero phonon line at 1.5260 ì. Excitation of all higher absorption transitions (2pðu, etc.) at liquid helium temperature (LHeT) produces a visible luminescence at 600 nm. At higher temperature a thermally activated process (activation energy ÄE = 0.063 eV) transfers the excitation energy to the lowest excited state 2póu quenching the 600-nm luminescence and producing the IR emission.|
|Link to this record:||urn:nbn:de:bsz:291-scidok-22109|
|Date of registration:||7-Jul-2009|
|Faculty:||SE - Sonstige Einrichtungen|
|Department:||SE - INM Leibniz-Institut für Neue Materialien|
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