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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/5125

Title: Diffusion of localized optical excitations and trap emission in ruby
Authors: Heinrichs, J.
Kumar, A.A.
Kumar, N.
Issue Date: 1977
Publisher: Institute of Physics
Citation: Journal of Physics C: Solid State Physics, 1977, Vol. 10, p391
Abstract: Using the critical percolation conductance method the energy-dependent diffusion coefficient associated with thermally assisted transfer of the R1 line excitation between single Cr3+ ions with strain-induced randomness has been calculated in the 4A2 to E(2E) transition energies. For localized states sufficiently far away from the mobility edge the energy transfer is dominated by dipolar interactions, while very close to the mobility edge it is determined by short-range exchange interactions. Using the above energy dependent diffusion coefficient a macroscopic diffusion equation is solved for the rate of light emission by Cr3+ ion-pair traps to which single-ion excitations are transferred. The dipolar mechanism leads to good agreement with recent measurements of the pair emission rate by Koo et al. (Phys. Rev. Lett., vol.35, p.1669 (1975)) right up to the mobility edge.
Description: Restricted Access
URI: http://hdl.handle.net/2289/5125
ISSN: 0022-3719
Alternative Location: http://dx.doi.org/10.1088/0022-3719/10/3/009
http://adsabs.harvard.edu/abs/1977JPhC...10..391H
Copyright: 1977 Institute of Physics
Appears in Collections:Research Papers (TP)

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