Steady-state mechanism for polymer ablation by a free-running Er:YAG laser

被引：14

作者：

Bubb, D. M.

Sezer, A. O.

Harris, D.

Rezae, F.

Kelty, S. P.

机构：

[1] Rutgers State Univ, Dept Phys, Camden, NJ 08102 USA

[2] USN, Res Lab, Washington, DC 20375 USA

[3] Haverford Coll, Dept Chem, Haverford, PA 19041 USA

[4] Seton Hall Univ, Dept Econ, S Orange, NJ 07079 USA

[5] Seton Hall Univ, Dept Chem & Biochem, S Orange, NJ 07079 USA

[6] Seton Hall Univ, Ctr Computat Res, S Orange, NJ 07079 USA

来源：

APPLIED SURFACE SCIENCE | 2006年 / 253卷 / 05期

基金：

美国国家科学基金会;

关键词：

laser ablation; steady-state; ablation mechanism; pulsed laser deposition; polymer ablation; physical vapor deposition;

D O I：

10.1016/j.apsusc.2006.04.059

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A free-running Er:YAG laser is used to ablate polyethylene glycol and the ablation yield is studied as a function of molecular weight (100010,000 g/mol) and laser fluence (8-25 J/cm(2)). A steady-state ablation mechanism is proposed which includes recoil-induced expulsion as the primary contributor to the ablation yield. It is also proposed that the formation of a molten layer is a necessary part of the ablation mechanism because the calculated tensile strengths for the solid polymer are too large to permit fracture of the target due to the laser-induced stress transient. The ablation yield is found to depend in a sigmoidal fashion upon laser fluence, thus implying a variable ablation enthalpy. Finally, the current results are compared with that obtained previously with a free electron laser. Published by Elsevier B.V.

引用

页码：2386 / 2392

页数：7

共 42 条

[1] Fibre optic jacket removal by pulsed laser ablation [J].