Observation of voids and optical seizing of voids in silica glass with infrared femtosecond laser pulses
Observation of voids and optical seizing of voids in silica glass with infrared femtosecond laser pulses
复制标题
使用红外飞秒激光脉冲观察石英玻璃中的空隙和光学捕获空隙
DOI：
10.1117/12.405684
复制
发表时间：
2000
期刊：
影响因子：
--
通讯作者：
K. Itoh
中科院分区：
文献类型：
--
作者：
W. Watanabe;T. Toma;Kazuhiro Yamada;J. Nishii;K. Hayashi;K. Itoh
许多研究人员已经研究了飞秒激光脉冲与各种材料的相互作用。对透明材料的表面和内部结构进行了改进。当飞秒激光脉冲聚焦到具有高数值孔径物镜的玻璃中时，就会形成空洞。我们证明，人们可以捕获和移动飞秒激光脉冲在二氧化硅玻璃中形成的空洞，也可以将两个空洞合并为一个。我们还通过展示裂隙空洞的扫描电子显微镜图像，提供了空洞是空洞的明确证据：我们沿着一个平面穿过玻璃，该平面包括表面上被激光烧蚀的细线和内部形成的空洞。孔洞的光学捕获和合并是制作可重写三维光学存储等微光学动态器件的重要基础技术。
Many researchers have investigated the interaction of femtosecond laser pulses with a wide variety of materials. The structural modifications both on the surface and inside the bulk of transparent materials have been demonstrated. When femtosecond laser pulses are focused into glasses with a high numerical-aperture objective, voids are formed. We demonstrate that one can seize and move voids formed by femtosecond laser pulses inside silica glass and also merge two voids into one. We also present clear evidence that a void is a cavity by showing a scanning-electron-microscope image of cleft voids: we clove through the glass along a plane that includes the laser-ablated thin line on the surface and the voids formed inside. The optical seizing and merging of voids are important basic techniques for fabricate micro-optical dynamic devices, such as the rewritable 3-D optical storage.