Ultrasensitive coherent Raman technique with picosecond lasers

The sensitivity of the Raman-induced Kerr effect is greatly enhanced through the use of picosecond lasers. Experiments in dilute solutions of benzene indicate that sensitivity at the monolayer level is achievable. Applications to transparent media, to fluorescing samples, and to in situ measurements of electrode surfaces are discussed. Comparisons are made to surface-enhanced Raman spectroscopy and to coherent anti-Stokes Raman spectroscopy.