Development and applications of nonlinear optical spectroscopy: 10th ECONOS/30th ECW meeting in Enschede, The Netherlands
Author(s) -
Offerhaus Herman L.,
Radi Peter,
Otto Cees
Publication year - 2012
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.4108
Subject(s) - spectroscopy , raman spectroscopy , nonlinear system , coherent spectroscopy , raman scattering , field (mathematics) , nonlinear optical , computer science , engineering physics , materials science , optics , coherent anti stokes raman spectroscopy , physics , quantum mechanics , mathematics , pure mathematics
5 The joint conference of the European Conference on Nonlinear Optical Spectroscopy (ECONOS) and European CARS Workshop (ECW) covers all theoretical and experimental aspects of nonlinear optical spectroscopy and microscopy. Topics include Coherent anti-Stokes Raman scattering (CARS) spectroscopy and microscopy and other forms of coherent Raman scattering, other approaches to the detection of nonlinear optical responses in time and frequency domain, and investigations of the physical and chemical processes defining the spectral signatures in different nonlinear media. Also emerging analytical techniques and their applications in biomedical research, material science, and engineering are discussed. The tenth ECONOS conference and 30th CARS workshop were held at the University of Twente in Enschede, the Netherlands on 23–25 May 2011. Altogether, 103 participants shared their research in invited sessions and poster sessions. In addition, the meeting included a session on industrial applications of nonlinear optical spectroscopy. This special issue of the Journal of Raman Spectroscopy presents 14 papers from that meeting. The papers reflect some general directions in which the field of nonlinear spectroscopy is developing. There are four papers on high-precision analysis of gas temperatures, three papers discuss new analysis methods of measurements, three papers discuss medical applications, and four papers discuss new developments in technology. Coherent anti-Stokes Raman scattering offers the possibility of stand-off temperature measurements in the harshest of environments such as combustion chambers or jet engines. Hence, the use of CARS for thermometry has been developed over many years already. Increasingly complex mixtures are tackled and the precision is increased. Four papers focus on these issues. Marrocco et al. and Bohlin et al. investigate the Herman– Wallis corrections for different species. This interaction between the rotational and vibrational motions causes changes in the detected line shapes that can give rise to incorrect estimations of the relative concentrations or temperatures. Choosing the correct model for these corrections is essential when trying to measure minority species of a few per cent. Bohlin et al. experimentally explore the use of rotational CARS within one vibrational state to perform thermometry of N2O and achieve a high degree of precision in the thermometry. Intensity limits that can be applied to high temperature flames before saturation and broadening effects reduce the accuracy are determined by Magnotti et al. It is often advantageous to combine several forms of analysis or different techniques to extract more information from a sample and reach a higher accuracy. Such an approach is applied by Marrocco using time-resolved CARS and the dependence of the rotational–vibrational coupling to reach better accuracy.