Periodic void arrays in silica and BK7 glasses induced by tight-focused femtosecond laser pulses

作     者：Haiyi Sun Jue Song Chengbin Li Jian Xu Xinshun Wang Jianrong Qiu Ya Cheng Zhizhan Xu State Key Laboratory of High Field Laser Physics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,P.O.Box 800-211,Shanghai 201800,P.R.China ~2Department of Materials Science and Engineering,Zhejiang University,Hangzhou 31002 7,China 

会议名称：《2006年全国强场激光物理会议》

会议日期：2006年

学科分类：080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0803[工学-光学工程] 

关 键 词：femtosecond laser fused silica BK7 glass void array whole length 

摘      要：正We demonstrate self-fabricated periodic void arrays inside fused silica and BK7 glass induced by tight focusing（NA=0.9）femtosecond laser pulses under the condition of deep focal *** effects of the focusing conditions,including laser energy,pulse number and focal depth on the shape and the whole length of the fabricated void arrays were *** divided single void was easily fabricated when multiple pulses were irradiated.A single laser pulse tended to induce a staged linearly drawn shape,and the staged character showed more evident with increasing focusing *** whole length of microstructure was strongly dependent on the depth of the focal point,pulse energy and pulse number,which became longer with the increase of these parameters,but not infinite,it will decrease again as these parameters increase to a certain *** was more evident in silica glass than in BK7 glass due to the larger nonlinear refraction index of silica glass.