Electronic Defect States in Alkali Halides
The initiator of the field of electronic-molecular defect complexes and c- sequently also the basis of this work was Professor F. Luty of the University of Utah. In a Physical Review Letter of 1983 he reported together with his colleague and coworker Y. Yang, two first time observations: r E V energy transfer from an electronic F center defect to the stretch-mode vibration of a neighboring molecular ion (CN-) vibrational luminescence of a molecule in an ionic solid with almost c- pletely radiative transition rates. With these findings, they showed that it is still possible to discover un- pected, exciting physics even in such "simple" and "well understood" systems as substitutional defects in alkali halides. From early on Professor W. von der Osten of the University of Paderborn, who was on sabbatical in Utah in 1984, and Professor J.-M. Spaeth, also of the University of Paderborn became - volved, with their respective research groups and experimental specialities, and made significant contributions to the field. I was very lucky to have the unique opportunity to work in the groups of these major players in the field and to profit from their experience for which I am very grateful.
Up-to-date overview on electronic defect states in alkali halides