Femtosecond acoustic signal via laser-induced plasma

Tien-Tien Yeh^1*, Yi Chen Liu¹, Takayoshi Kobayashi^1,2, Chih-Wei Luo¹

¹Electrophysics, National Chiao Tung University, Hsinchu, Taiwan
²Brain science Inspired Life Support Research Center, The University of Electro-Communications, Tokyo, Japan

* Presenter:Tien-Tien Yeh, email:jiljiljilji@gmail.com

Laser-induced plasma performs a dramatic enhancement of nonlinear process through the use of a highly energetic laser pulse as the excitation source. During various plasma formatting processes, such as electron avalanche, electrostatic ion removal, and thermal effect, the acoustic wave with slow process is induced. However, the femtosecond pulse signal can be obtained via this complex and slow interaction (micro- to milli-second). Here, we exhibit the femtosecond acoustic signal of the high-order nonlinear process, and further discuss the dynamic process of the interaction.

Keywords: Laser-induced plasma, Acoustic signal, Ultrafast dynamics