Generation and application of high power femtosecond pulses in the vibrational fingerprint region

被引：40
|
作者：
Sugiharto, A. B. [1 ]
Johnson, C. M. [1 ]
De Aguiar, H. B. [1 ]
Alloatti, L. [1 ]
Roke, S. [1 ]
机构：
[1] Max Planck Inst Met Res, D-70569 Stuttgart, Germany
来源：
APPLIED PHYSICS B-LASERS AND OPTICS | 2008年 / 91卷 / 02期
关键词：
D O I：
10.1007/s00340-008-2993-7
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We present a novel high power femtosecond infrared laser source, based on a three-stage chirped-pulse amplification scheme. Owing to the high power output of the Ti:sapphire amplifiers, it becomes routinely possible to produce femtosecond infrared laser pulses in the wavelength region of 2.6-20 mu m with minimum pulse energies of 15 mu J, to our knowledge roughly an improvement of an order of magnitude. With such pulses we have performed femtosecond second-order nonlinear optical surface spectroscopy in the fingerprint region. We have probed the skeletal modes of the first few monolayers of a polymer/air interface in a femtosecond vibrational sum frequency generation experiment. This development opens up new possibilities to investigate surface structures and dynamics of, e.g., organo-metallic compounds, proteins, and peptides.
引用
收藏
页码：315 / 318
页数：4
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