TITLE

Pump pulse duration dependence of coherent phonon amplitudes in antimony

AUTHOR(S)
Misochko, O.
PUB. DATE
August 2016
SOURCE
Journal of Experimental & Theoretical Physics;Aug2016, Vol. 123 Issue 2, p292
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Coherent optical phonons of A and E symmetry in antimony have been studied using the femtosecond pump-probe technique. By varying the pump-pulse duration and keeping the probe duration constant, it was shown that the amplitude of coherent phonons of both symmetries exponentially decreases with increasing pulse width. It was found that the amplitude decay rate for the fully symmetric phonons with larger frequency is greater than that of the doubly degenerate phonons, whereas the frequency and lifetime for coherent phonons of both symmetries do not depend on the pump-pulse duration. Based on this data, the possibility of separation between dynamic and kinematic contributions to the generation mechanism of coherent phonons is discussed.
ACCESSION #
118060007

 

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