Abstract
Optical activity in sum-frequency vibrational spectra has been observed for the first time in chiral liquids. The electric-dipole allowed chiral element of the nonlinear susceptibility appears to be 3 orders of magnitude smaller than typical allowed achiral elements. This is partly because the observed chirality requires a breakdown of the Born-Oppenheimer approximation.
- Received 25 May 2000
DOI:https://doi.org/10.1103/PhysRevLett.85.4474
©2000 American Physical Society