PICOSECOND COHERENT RAMAN-STUDY OF SOLID-STATE CHEMICAL-REACTIONS DURING LASER POLYMER ABLATION

被引：48

作者：

HARE, DE ^{[1
]}

DLOTT, DD ^{[1
]}

机构：

[1] UNIV ILLINOIS,SCH CHEM SCI,URBANA,IL 61801

来源：

APPLIED PHYSICS LETTERS | 1994年 / 64卷 / 06期

关键词：

D O I：

10.1063/1.111044

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Multiplex picosecond time-resolved coherent anti-Stokes Raman spectroscopy (CARS) is used to study the dynamics of a thin film of a polymer, poly-methyl methacrylate (PMMA), undergoing photothermal laser ablation. Time-dependent CARS spectra of a PMMA Raman transition near 810 cm(-1) reveal line broadening, attributed to temperature increase, peak shift, attributed to rapid volume expansion, and the appearance of a new peak attributed to the formation of methyl methacrylate by picosecond time scale polymer thermal decomposition. This is believed to be the first direct observation of a chemical reaction product in the solid itself, during laser ablation.

引用

页码：715 / 717

页数：3

共 19 条

[1] APPLICATIONS OF ULTRAFAST TEMPERATURE JUMP SPECTROSCOPY TO CONDENSED PHASE MOLECULAR-DYNAMICS [J].