Properties of nonclassical correlated Stokes-anti-Stokes photon pair in decane

In this study, the correlated Stokes-anti-Stokes Raman scattering, denominated as the SaS process, is investigated in a decane sample, generalizing for a liquid the results observed in crystalline diamond. The production of SaS photon pairs is observed in both real and virtual processes by measuring nonclassical values of the second-order cross-correlation function g2SaS(0). The correlated Raman spectrum is observed only for Raman shift values below approximately 2900 cm-1, which is equivalent to the highest vibrational mode of the decane molecule. Furthermore, despite the fact that decane is a liquid, the polarization and spatial profile of the SaS process in decane presents the same properties as those observed in diamond.