Generation and application of high power femtosecond pulses in the vibrational fingerprint region
2008 (English)In: Applied physics. B, Lasers and optics (Print), ISSN 0946-2171, E-ISSN 1432-0649, Vol. 91, no 2, 315-318 p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2008. Vol. 91, no 2, 315-318 p.
IdentifiersURN: urn:nbn:se:kth:diva-17485DOI: 10.1007/s00340-008-2993-7ISI: 000255392500018OAI: oai:DiVA.org:kth-17485DiVA: diva2:335529
QC 201005252010-08-052010-08-05Bibliographically approved