Model of transient cooperative phenomena triggered by THz-pulse irradiation

We studied the cooperative phenomena induced by injection of coherent phonons by THz optical pulses. Based on the analogy to the photoinduced phase transitions observed in various materials, we consider that cooperative interactions between electrons and coherent phonons will lead to the multiplicat...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 633; no. 1; pp. 12061 - 12065
Main Authors Ishida, Kunio, Nasu, Keiichiro
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 21.09.2015
Subjects
Electrons
Irradiation
Multiplication
Optical pulses
Phase transitions
Phonons
Physics
Potential energy
Wave packets
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Summary:We studied the cooperative phenomena induced by injection of coherent phonons by THz optical pulses. Based on the analogy to the photoinduced phase transitions observed in various materials, we consider that cooperative interactions between electrons and coherent phonons will lead to the multiplication of excited electrons and or growth of a transient phase, which is understood by bifurcation of quantum-mechanical wavepackets on adiabatic potential energy surfaces. Employing a model of localized electrons coupled with a quantized optical phonon mode, we discuss the dynamics of the cooperative phenomena by THz-pulse irradiation and, in particular, the role of the number and or the initial distribution of phonons in the initial creation process of transient phases.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/633/1/012061