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Note: Research in this publication was not performed at Janelia.
We study chiral response in optical sum-frequency generation near electronic resonances from a 1,1 ′ −bi−2 -naphthol (BN) monolayer adsorbed on water. The polarization dependence of the spectra indicates that the molecules are well oriented at the surface with their symmetry axis along the surface normal. Orientational ordering effectively enhances the chiral response per BN molecule. The results can be quantitatively understood with a simple coupled-oscillator model for BN.