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Coherent phonon signal amplification technique based on a numerical differentiation method
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DOI：10.1063/5.0198030.png)
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Abstract
En 中文
Coherent optical phonon (COP) and coherent acoustic phonon (CAP) play vital roles in probing ultrafast dynamics across various materials and systems. Their applications range from metamaterial diagnosis to manipulating ferroelectric polarization and self-trapping of carriers in perovskites. However, the inherently small signals associated with COP and CAP pose challenges in extracting valuable information. In this paper, we address this challenge by presenting a numerical differential method for signal amplification and deduction of phonon dephasing time. In addition, application of this method has been demonstrated in a superlattice system, establishing the validity and effectiveness of this technique.
Keywords:
OSCILLATIONS
GENERATION
Journal
IF:
3.6
Papers:
10.4W
Citations:
17.8W