On the Experimental Estimation of Surface Enhanced Raman Scattering   (SERS) Cross Sections by Vibrational Pumping
  We present an in-depth analysis of the experimental estimation of cross sections in Surface Enhanced Raman Scattering (SERS) by vibrational pumping. The paper highlights the advantages and disadvantages of the technique, pinpoints the main aspects and limitations, and provides the underlying physical concepts to interpret the experimental results. Examples for several commonly used SERS probes are given, and a discussion on future possible developments is also presented. 
R. C. Maher, L. F. Cohen, E. C. Le Ru and P. G. Etchegoin