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ZhETF Pisma Redaktsiiu

Anisotropy of resonant absorption of high-frequency 0.87 X 10 12 Hz phonons in the excited state of Cr 3+ ions in ruby

Alexander A. Kaplyanskii, S. A. Basun, V. A. Rachin, Роман Алексеевич Титов

Published Apr 1, 1975• 0 citations
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By using far-infrared laser spectroscopy we have studied the temperature dependence of the absorption that is due to transitions between the E ((2)E) and 2A ((2)E) levels of excited Cr(3+) ions in ruby. From the temperature dependence of the linewidth we determined the inhomogeneous and the homogeneous contributions to line broadening. From the homogeneous width the lifetime of the 2A level was obtained. We found that, for emperatures up to 70 K, the lifetime is due mainly to one-phonon relaxation, whereas at higher temperatures another relaxation process, probably a two-phonon Raman process, becomes strong.