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arXiv · 2511.08044

Attosecond-resolved coherent control of zone-folded acoustic phonons in silicon carbide

Hiromu Matsumoto·Tsukasa Maruhashi·Yosuke Kayanuma·Yadong Han·Jianbo Hu·Kazutaka G. Nakamura
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Abstract

Zone-folded acoustic phonons (6 THz) in 4H silicon carbide (SiC) have been coherently excited using a femtosecond near-infrared pulse and measured through transient reflectivity with a pump and probe protocol. Their amplitude is coherently controlled with 300-attoseconds precision and the results show interference fringe patterns due to electronic and phonon interference. The results are well reproduced by a model calculation with two electronic and phonon levels and an impulsive stimulated Raman process. Using the model, we obtain the analytical form of the coherent control scheme at an off-resonant condition.

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Hiromu Matsumoto, Tsukasa Maruhashi, Yosuke Kayanuma, Yadong Han, Jianbo Hu, Kazutaka G. Nakamura. 2025-11-11. Attosecond-resolved coherent control of zone-folded acoustic phonons in silicon carbide. https://arxiv.org/abs/2511.08044

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