The Ti:sapphire oscillator is used to realize structural change in an organic glass (polymethyl -methacrylate (PMMA)). Single pulse fluence threshold of PMMA and the relation of the breakdown threshold with different numerical aperture objectives are determined using a formula deduced from an existent equation. Three-dimensional dots in the organic glass is performed at the same time.
© 2005 Chinese Optics Letters
(140.7090) Lasers and laser optics : Ultrafast lasers
(190.4710) Nonlinear optics : Optical nonlinearities in organic materials
(210.4810) Optical data storage : Optical storage-recording materials
(220.4610) Optical design and fabrication : Optical fabrication
Xiaochang Ni, Ching-Yue Wang, Zhuan Wang, Minglie Hu, Yanfeng Li, and Lu Chai, "The study of nanojoule femtosecond laser ablation on organic glass," Chin. Opt. Lett. 1, 429-431 (2003)