Quantum kinetics of coherent optical phonons in semiconductors — Non-Markovian behaviour induced by anharmonic renormalization

✍ Scribed by U. Wenschuh; W. Schäfer

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 220 KB
• Volume: 219-220
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/0921-4526(95)00760-1

✦ Synopsis

The influence of anharmonic renormalization effects on the decay dynamics of coherent longitudinal optical phonons is investigated from a microscopic point of view. The renormalization effects are found to depend on the special properties of the phonon dispersion of the given material and to induce non-Markovian decay dynamics. Non-Markovian dynamics of the decay of coherent LO-phonons is calculated for GaP and results in a 30% faster decay signal than the corresponding Markovian dynamics.