Abstract
We describe and characterize an experimental apparatus that generates tunable infrared light pulses from 3.4 to 7.0 μm by difference-frequency mixing in AgGaS2. The pulses are 2.16 ps in duration, have a frequency bandwidth of 6.6 cm−1, and are produced at a 76-MHz repetition rate. Because the apparatus is compatible with low signal lock-in modulation and signal-averaging techniques, the infrared probe pulses can be used to measure very small (<10−4) vibrational absorption changes on fast time scales. We demonstrate this sensitivity by using the source to perform linear vibrational spectroscopy of adsorbed CO on Cu[111].
© 1991 Optical Society of America
Full Article | PDF ArticleMore Like This
R. Laenen, K. Simeonidis, and A. Laubereau
J. Opt. Soc. Am. B 15(3) 1213-1217 (1998)
A. Tokmakoff, C. D. Marshall, and M. D. Fayer
J. Opt. Soc. Am. B 10(9) 1785-1791 (1993)
E. C. Cheung and J. M. Liu
J. Opt. Soc. Am. B 8(7) 1491-1506 (1991)