This article is part of the Journal of Raman Spectroscopy special issue entitled “Proceedings of the 9th European Conference on Nonlinear Optical Spectroscopy (ECONOS), Bremen, Germany, June 21–23, 2010” edited by Peter Radi, PSI, Villigen, Switzerland, and Arnulf Materny, Jacobs University, Bremen, Germany.
Dissection of dispersed off-resonant femtosecond degenerate four-wave mixing of O2†
Article first published online: 31 MAR 2011
Copyright © 2011 John Wiley & Sons, Ltd.
Journal of Raman Spectroscopy
Volume 42, Issue 10, pages 1848–1853, October 2011
How to Cite
Knopp, G., Radi, P. P., Sych, Y. and Gerber, T. (2011), Dissection of dispersed off-resonant femtosecond degenerate four-wave mixing of O2. J. Raman Spectrosc., 42: 1848–1853. doi: 10.1002/jrs.2921
- Issue published online: 24 OCT 2011
- Article first published online: 31 MAR 2011
- Manuscript Accepted: 20 JAN 2011
- Manuscript Received: 16 NOV 2010
- time and frequency resolved;
- four-wave mixing;
- rotational recurrences
Simultaneous time and frequency detection in off-resonant femtosecond degenerate four-wave mixing (fs-DFWM) experiments displays spectral features that are covered in standard, nondispersed, frequency-integrated measurements. The application of laser fields with finite bandwidths, narrower than or comparable to the rotational Raman bands, affects the observed coherent signals. Information available from such experiments is split between the time and frequency domains and an improved measurement necessitates a combined detection. Rotational recurrences of oxygen (O2), measured by dispersed fs-DFWM at room temperature, exhibit spectral characteristics, using 800-nm laser pulses with ∼100 fs duration. Analysis of the detected signals in both dimensions incorporating temporal and spectral trends can assist in the extraction and interpretation of chemicophysical quantities from the experiment. The dispersed recurrent signals are in accordance with simulations. Copyright © 2011 John Wiley & Sons, Ltd.