PdSe2薄膜中层依赖的超快载流子动力学和层间相干声子动力学的观察

2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz) Pub Date : 2021-08-29 DOI:10.1109/IRMMW-THz50926.2021.9567251

Di Li, Wenjie Zhang, Jibo Fu, Peng Suo, Xian Lin, G. Ma

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引用次数: 0

摘要

在这项工作中，我们利用超快光泵浦探测光谱研究了PdSe2薄膜中的光载流子动力学以及厚度相关的层间相干声子模式。在780 nm光激发后，PdSe2薄膜中存在两种低频声子模式。将高频模态归为层间呼吸模态，低频模态归为驻波模态，研究了两种模态的频率变化规律及相关参数(层间力常数和声速)。

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Observation of Layer Dependent Ultrafast Carrier dynamics and Interlayer Coherent Phonon Dynamics in PdSe2 Films

In this work, by employing ultrafast optical pump-probe spectroscopy, we investigated the photocarrier dynamics as well as the thickness dependent interlayer coherent phonon modes in PdSe2 films. Two low-frequency phonon modes in PdSe2 films are identified after photoexcitation at 780 nm. The higher frequency mode is ascribed to the interlayer breathing mode, and the lower one is assigned to the standing wave mode, and the frequency variation and the related parameters (interlayer force constant and sound velocity) of the two modes are investigated.

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来源期刊

2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz)

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