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VOLUME 55 (1992) | ISSUE 12 | PAGE 681
Effect of short heat pulses on coherently excited optical centers in ruby
A change caused in the amplitude of the coherent emission of the system of Cr3+ impurity centers in A1203 by nonequilibrium terahertz-frequency phonons has been observed. A change has also been observed in the intensity of the optical echo in ruby when a pulsed magnetic field was applied before the lasing pulses. In this case the echo modulation cannot be described by the known mechanisms involving the effect of an rf field on an impurity spin system.