Atomistic investigation of ablation of amorphous polystyrene under femtosecond laser pulse

作者：Huang YanHua; Song ChengWei; Zhang JunJie^*; Sun Tao

来源：Science China Physics,Mechanics & Astronomy, 2015, 58(3): 037002.

DOI：10.1007/s11433-014-5587-x

• polystyrene
• femtosecond laser ablation
• molecular dynamics
• laser intensity
• molecular architecture

In the present work we elucidate the thermodynamic mechanisms of femtosecond (fs) laser ablation of amorphous polystyrene by means of molecular dynamics (MD) simulations. The effects of extrinsic parameter of laser pulse intensity and intrinsic parameter of molecular architecture on the laser ablation are further studied. Simulation results show that the laser ablation-induced polymeric material removal is achieved by evaporation from the surface and expansion within the bulk. Furthermore, inter-chain sliding and intra-chain change also play important roles in the microscopic deformation of the material. It is found that both the laser pulse intensity and the arrangement of phenyl groups have significant influence on the fs laser ablation of polystyrene.

• 出版日期2015-3
• 单位中国工程物理研究院; 哈尔滨工业大学; 中国工程物理研究院激光聚变研究中心