Three-wave mixing in chiral liquids
Second-order nonlinear optical frequency conversion in isotropic systems is only dipole allowed for sum- and difference-frequency generation in chiral media. We develop a single-center chiral model of the three-wave mixing (sum-frequency generation) nonlinearity and estimate its magnitude. We also report results from ab initio calculations and from three- and four-wave mixing experiments in support of the theoretical estimates. We show that the second-order susceptibility in chiral liquids is much smaller than previously thought.
Fischer
P
Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom and European Laboratory for Nonlinear Spectroscopy, Largo E. Fermi 2, 50125 Florence, Italy and and Istituto Nazionale per la Fisica della Mat.
Wiersma
DS
Righini
R
Champagne
B
Buckingham
AD