We show that quenching of the Nd fluorescence is in principle not associated with the Nd3+ ion but with the host. The process is due to near-field electric dipole interaction between Nd pairs, and cross relaxation via the4I1 5/2 manifold. We present for the first time the complete fluorescence spectrum and level scheme of Nd∶YAG, and find that Nd∶YAG has an exceptional level configuration which boosts cross relaxation. Our results encourage the search for new Nd laser materials which have a slightly different position of the4I1 5/2 manifold so that higher Nd concentrations can be achieved for integrated-optics applications. Finally, we report on implications of energy migration which we found to be quite effective in Nd∶YAG.
Index HeadingsNeodymium YAG Fluorescence quenching
Unable to display preview. Download preview PDF.
- 1.Laser Focus, July 1972, p. 36Google Scholar
- 3.J. E. Geusic: Solid State Maser Res. (Optical), Final Report AD-482-511 (August 1965)Google Scholar
- 5.G. E. Peterson, P. M. Bridenbaugh: J. Opt. Soc. Am.54, 644 (1964)Google Scholar
- 6.F. Willmann, D. Bimberg, M. Blätte: Phys. Rev.B7, (1973)Google Scholar
- 7.P. P. Feovilov, V. A. Timoteeva, M. N. Tolstoi, L. M. Belyaev: Opt. and Spectr.19, 451 (1965)Google Scholar
- 10.Th. Förster: Ann. Phys.2, 55 (1948), reformulated by D. L. Dexter and J. H. Schulman in J. Chem. Phys.22, 1063 (1954)Google Scholar
- 11.R. K. Watts: J. Opt. Soc. Am.61, 123 (1971)Google Scholar