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Authors: Mebert, Joachim
Koblinger, Otto
Döttinger, Siegfried
Eisenmenger, Wolfgang
Title: Phonon absorption-spectroscopy in the presence of strong elastic phonon scattering
Issue Date: 1986 Konferenzbeitrag Phonon scattering in condensed matter : proceedings of the fifth international conference, Urbana, Illinois, June 2-6, 1986. Berlin : Springer, 1986 (Springer series in solid state sciences 68). - ISBN 3-540-17057-X, S. 248-250
Abstract: In this work we show that in the presence of a strong phonon scattering background absorption structures can only be well resolved by reducing sample thickness to the phonon mean free path. This mean free path can be determined by analyzing the pulse shape of 285 GHz phonons. By reducing sample thickness to the appropriate value of 0,3mm the 21,2 cm -1 crystalline field transition in CaF 2:Er 3+ could be evaluated with the very high resolution of 5 GHz. In experiments performed on a 1mm thick LaF 3 Er 3+ sample we observed an absoption line at 14,2 cm -1 not visible in FIR absorption measurements.
Appears in Collections:08 Fakultät Mathematik und Physik

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