Three-dimensional reversible laser micromachining with subnanojoule femtosecond pulses based on two-photon photochromism

被引：20
|
作者：
Konorov, SO [1 ]
Fedotov, AB [1 ]
Zheltikov, AM [1 ]
机构：
[1] Moscow MV Lomonosov State Univ, Dept Phys, Ctr Int Laser, Moscow 119899, Russia
来源：
APPLIED PHYSICS B-LASERS AND OPTICS | 2003年 / 76卷 / 06期
关键词：
D O I：
10.1007/s00340-003-1202-y
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Three-dimensional reversible laser micromachining of polymer materials based on two-photon photochromism is demonstrated. Unamplified 60-fs, 0.5-nJ pulses of 790-nm Ti:sapphire laser radiation are used to induce a refractive-index change in a polymethyl methacrylate (PMMA) sample doped with spiropyran molecules through a two-photon absorption process. Waveguides are written in the bulk of spiropyran-doped PMMA samples by scanning these samples with respect to a tightly focused Ti:sapphire laser beam. Laser-induced fluorescence is used for on-line monitoring of the laser-micromachining process. The structures written in photochromic samples can be erased and reconfigured due to the reversibility of the photochromic effect.
引用
收藏
页码：707 / 710
页数：4
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