Femtosecond pulse laser-induced self-organized nanostructures on the surface of ZnO crystal
Zhong Min-Jian(钟敏建)a)b), Guo Guang-Lei(郭广磊)a), Yang Jun-Yi(杨俊毅)a), Ma Ning-Hua(马宁华)a), Ye Guo(叶果)a), Guo Xiao-Dong(郭晓东)c), Li Ru-Xin(李儒新)c), and Ma Hong-Liang(马洪良)a)b)†
a Department of Physics, Shanghai University, Shanghai 200444, China; b Instrumental Analysis and Research Center, Shanghai University, Shanghai 200444, China; c State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
Abstract This paper reports self-organized nanostructures observed on the surface of ZnO crystal after irradiation by a focused beam of a femtosecond Ti:sapphire laser with a repetition rate of 250 kHz. For a linearly polarized femtosecond laser, the periodic nanograting structure on the ablation crater surface was promoted. The period of self-organization structures is about 180 nm. The grating orientation is adjusted by the laser polarization direction. A long range Bragg-like grating is formed by moving the sample at a speed of 10 $\mu$m/s. For a circularly polarized laser beam, uniform spherical nanoparticles were formed as a result of Coulomb explosion during the interaction of near-infrared laser with ZnO crystal.
Received: 14 June 2007
Revised: 20 June 2007
Accepted manuscript online:
Fund: Project supported by the Shanghai
Leading Academic Discipline Project (Grant No T0104), the Shanghai
Nano-technology Promotion Center and Science \& Technology of
Shanghai Municipality (Grant No 0652nm005) and Innovation Fund of Shanghai University, China
Cite this article:
Zhong Min-Jian(钟敏建), Guo Guang-Lei(郭广磊), Yang Jun-Yi(杨俊毅), Ma Ning-Hua(马宁华), Ye Guo(叶果), Guo Xiao-Dong(郭晓东), Li Ru-Xin(李儒新), and Ma Hong-Liang(马洪良) Femtosecond pulse laser-induced self-organized nanostructures on the surface of ZnO crystal 2008 Chin. Phys. B 17 1223
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