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Anharmonic Decay of Zone-Boundary Phonons Observed by a New Method of Phonon Detection

URN to cite this document:
urn:nbn:de:bvb:355-epub-186124
DOI to cite this document:
10.5283/epub.18612
Lengfellner, Hans ; Renk, Karl Friedrich
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Date of publication of this fulltext: 08 Dec 2010 08:19


Abstract

A new method for detection of zone-boundary phonons is presented. Phonons generated by nonradiative transitions in thallium halide crystals are detected by phonon difference absorption with use of time-resolved far-infrared laser spectroscopy. Our experiments, performed at crystal temperatures between 3 and 20 K, give experimental evidence of strongly-temperature-dependent anharmonic lifetimes of transverse-acoustic zone-boundary phonons.


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