Lattice dynamics of femtosecond laser-excited antimony

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• 作者：Mahmoud Hanafy Abdel-Fattah^a ; ^b ; Aleksey Bugayev^a ; Hani E. Elsayed-Ali^a ; ^b ; ^{helsayed@odu.edu" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Antimony ; Femtosecond excitation ; Lattice dynamics ; Electronic Gr&uuml ; neisen parameter
• 刊名：Physica B: Physics of Condensed Matter
• 出版年：2016
• 出版时间：1 July 2016
• 年：2016
• 卷：492
• 期：Complete
• 页码：65-69
• 全文大小：605 K

文摘

Ultrafast electron diffraction is used to probe the lattice dynamics of femtosecond laser-excited antimony thin film. The temporal hierarchies of the intensity and position of diffraction orders are monitored. The femtosecond laser excitation of antimony film was found to lead to initial compression after the laser pulse, which gives way to tension vibrating at new equilibrium displacement. A damped harmonic oscillator model, in which the hot electron-blast force contributes to the driving force of oscillations in lattice spacing, is used to interpret the data. The electron–phonon energy-exchange rate and the electronic Grüneisen parameter were obtained.