Paul M. Lundquist, Ruediger Wortmann, et al.
Science
Self-reversed line shapes have been observed in the low temperature phosphorescence spectrum of 1,4-dibromonaphthalene crystals when the crystals are illuminated by a collimated laser beam. Self-reversal is a consequence of reabsorption of the phosphorescence emission. The precise shape of the self-reversed lines is a very sensitive measure of small changes in the unreabsorbed emission spectrum with respect to the absorption spectrum and energy shifts as small as 1% of the linewidth can be measured. For dibromonaphthalene we attribute these changes to macroscopic variations in strain within the crystal. Numerical calculations of the line shapes based on a simple but realistic model are compared with the experimental line shapes. Copyright © 1976 American Institute of Physics.
Paul M. Lundquist, Ruediger Wortmann, et al.
Science
D.M. Burland, R.M. Macfarlane
Journal of Luminescence
R.M. Macfarlane, R.M. Shelby, et al.
Optics Letters
R.M. Macfarlane, D.P. Burum, et al.
Physical Review B