The manipulation of the subpulse number, pulse delay, and pulse energy distribution of an ultrafast laser enables electron dynamics control by changing absorptions, excitations, ionizations, and recombinations of electrons, which can result in smaller, cleaner, and more controllable structures. This letter experimentally reveals that ablation sizes and recasts can be controlled by shaping femtosecond pulse trains to adjust transient localized electron dynamics, material properties, and corresponding phase change mechanisms.
© 2013 Chinese Optics Letters
(140.3390) Lasers and laser optics : Laser materials processing
(320.5540) Ultrafast optics : Pulse shaping
(320.7130) Ultrafast optics : Ultrafast processes in condensed matter, including semiconductors
Lasers and Laser Optics
Chuancai Xu, Lan Jiang, Ni Leng, Yanping Yuan, Pengjun Liu, Cong Wang, and Yongfeng Lu, "Ultrafast laser ablation size and recast adjustment in dielectrics based on electron dynamics control by pulse train shaping," Chin. Opt. Lett. 11, 041403- (2013)