Phonon Spectroscopy with Chirped Shear and Compressive Acoustic Pulses.
PHYSICAL REVIEW LETTERS(2017)
摘要
Picosecond duration compressive and shear phonon wave packets injected into (311) GaAs slabs transform after propagation through similar to 1 mm into chirped acoustic pulses with a frequency increasing in time due to phonon dispersion. By probing the temporal optical response to coherent phonons in a near surface layer of the GaAs slab, we show that phonon chirping opens a transformational route for high- sensitivity terahertz and subterahertz phonon spectroscopy. Temporal gating of the chirped phonon pulse allows the selection of a narrow band phonon spectrum with a central frequency up to 0.4 THz for longitudinal and 0.2 THz for transverse phonons.
更多查看译文
关键词
phonon spectroscopy,chirped shear,acoustic
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要