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Detection Of acoustic zone-boundary phonons by phonon difference absorption

Lengfellner, Hans and Renk, Karl Friedrich (1981) Detection Of acoustic zone-boundary phonons by phonon difference absorption. Journal de physique 42 (C6), pp. 259-261.

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A new method for detection of zone-boundary phonons is reported. Phonons are detected by phonon difference absorption of far-infrared laser radiation. We present experimental results obtained for TlCl and TIBr crystals. Phonons are generated by nonradiative transitions in optically excited crystals. Our experiments indicate long-lived zone-boundary phonons at low crystal temperature and a strong decrease of the phonon lifetime with increasing temperature.

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Item type:Article
Institutions:Physics > Institute of Experimental and Applied Physics > Alumni or Retired Professors > Group Hans Lengfellner
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Dewey Decimal Classification:500 Science > 530 Physics
Created at the University of Regensburg:Unknown
Item ID:18584
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