标题： 通过激光脉冲冲击的下拉成形 显示英文标题

标题： Drop Shaping by Laser-Pulse Impact

摘要： 我们展示了激光能量的沉积如何引起吸收性液体物体的推进和强烈变形。 结合高速和频闪成像，我们观察到一个毫米大小的染色水滴被毫焦耳纳秒激光脉冲击中后以几米每秒的速度向前推进，并发生变形直至最终破裂。 滴体的运动是由于水蒸气化在滴体表面施加的反冲动量所致。 我们测量了滴体的推进速度和随时间变化的变形规律，并通过边界积分模拟进行了补充。 滴体的推进和成型可通过对激光脉冲能量、滴体尺寸和液体特性的解释来理解。 这些发现对于纳米光刻机中极端紫外光的产生至关重要。 显示英文摘要

摘要： We show how the deposition of laser energy induces propulsion and strong deformation of an absorbing liquid body. Combining high speed with stroboscopic imaging, we observe that a millimeter-sized dyed water drop hit by a millijoule nanosecond laser pulse propels forward at several meters per second and deforms until it eventually fragments. The drop motion results from the recoil momentum imparted at the drop surface by water vaporization. We measure the propulsion speed and the time-deformation law of the drop, complemented by boundary-integral simulations. The drop propulsion and shaping are explained in terms of the laser-pulse energy, the drop size, and the liquid properties. These findings are, for instance, crucial for the generation of extreme ultraviolet light in nanolithography machines.