Abstract
Tunable detection of high-frequency phonons in LaF3 is reported. Phonons generated by a heat-pulse technique are detected by phonon-induced fluorescence from magnetically split energy levels of Er3+ impurity ions. Evidence for a strongly frequency-dependent lifetime of acoustic phonons at frequencies above 600 GHz is found. The lifetime is attributed to spontaneous anharmonic phonon decay.
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Will, J.M., Eisfeld, W., Renk, K.F. et al. Tunable detection of high-frequency phonons in LaF3 . Appl. Phys. A 31, 191–193 (1983). https://doi.org/10.1007/BF00614953
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DOI: https://doi.org/10.1007/BF00614953