Bellouard Yves, Hongler Max-Olivier
Mechanical Engineering Department, Eindhoven University of Technology, Eindhoven, The Netherlands.
Opt Express. 2011 Mar 28;19(7):6807-21. doi: 10.1364/OE.19.006807.
By continuously scanning a femtosecond laser beam across a fused silica specimen, we demonstrate the formation of self-organized bubbles buried in the material. Rather than using high intensity pulses and high numerical aperture to induce explosions in the material, here bubbles form as a consequence of cumulative energy deposits. We observe a transition between chaotic and self-organized patterns at high scanning rate (above 10 mm/s). Through modeling the energy exchange, we outline the similarities of this phenomenon with other non-linear dynamical systems. Furthermore, we demonstrate with this method the high-speed writing of two- and three- dimensional bubble "crystals" in bulk silica.
通过在熔融石英样品上连续扫描飞秒激光束，我们展示了在材料中形成的自组织气泡。这里的气泡不是通过使用高强度脉冲和高数值孔径来在材料中引发爆炸而形成的，而是累积能量沉积的结果。我们观察到在高扫描速率（高于10毫米/秒）下混沌模式和自组织模式之间的转变。通过对能量交换进行建模，我们概述了这种现象与其他非线性动力系统的相似性。此外，我们用这种方法展示了在块状石英中高速写入二维和三维气泡“晶体”。
