A high-sensitivity femtosecond to microsecond time-resolved infrared vibrational spectrometer.
We describe an apparatus that provides, for the first time, a seamless bridge between femtosecond and microsecond time-resolved Raman and infrared vibrational spectroscopy. The laser system comprises an actively Q-switched sub-nanosecond pulsed kilohertz laser electronically synchronized to an ultrafast titanium sapphire regenerative amplifier to within 0.2 ns. The ultrafast amplifier provides the stable probe light source enabling high-sensitivity infrared vibrational spectroscopy of transients. Time-resolved infrared spectra of the excited-state relaxation dynamics of metal carbonyl compounds are presented to illustrate the capability of the apparatus, and transient data is resolved from 1 picosecond to over 100 microseconds. The results are compared to conventional nanosecond Fourier transform infrared (FT-IR) and laser based flash photolysis time-resolved infrared technology.
Towrie
Michael
M
Central Laser Facility, CCLRC, Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX, United Kingdom. m.towrie@rl.ac.uk
Gabrielsson
Anders
A
Matousek
Pavel
P
Parker
Anthony W
AW
Rodriguez
Ana Maria Blanco
AM
Vlcek
Antonín
A
D003199:Computer Systems; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007700:Kinetics; D007834:Lasers; D008670:Metals / Q000032:analysis* / Q000737:chemistry*; D036103:Nanotechnology / Q000295:instrumentation* / Q000379:methods; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013055:Spectrophotometry, Infrared / Q000295:instrumentation* / Q000379:methods; D013059:Spectrum Analysis, Raman / Q000295:instrumentation* / Q000379:methods; D013997:Time Factors; D014732:Vibration
D008670:Metals