Journal
JOURNAL OF LUMINESCENCE
Volume 125, Issue 1-2, Pages 55-59Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jlumin.2006.08.024
Keywords
spin-lattice relaxation; non-equilibrium phonons; coherent phonons; stimulated emission
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Two examples are treated of nonequilibriurn phonons in ruby as studied with optical pumping for generation and luminescence for detection. The first example concerns nonequilibrium 29cm(-1) and near-zone-boundary phonons generated in the nonradiative decay from higher multiplets to 2 (A) over bar(E-2) and (E) over bar(E-2). The second example shows that coherent phonons are produced by stimulated emission over the Zeeman transition within the (E) over bar(E-2) metastable doublet. (c) 2006 Elsevier B.V. All rights reserved.
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