Abstract
We propose a method for increasing Raman scattering from an ensemble of molecules by up to 4 orders of magnitude. Our method requires an additional coherent source of IR radiation with the half-frequency of the Stokes shift. This radiation excites the molecule electronic subsystem that in turn, via Fröhlich coupling, parametrically excites nuclear oscillations at a resonant frequency. This motion is coherent and leads to a boost of the Raman signal in comparison to the spontaneous signal because its intensity is proportional to the squared number of molecules in the illuminated volume.
- Received 28 January 2019
DOI:https://doi.org/10.1103/PhysRevLett.122.153905
© 2019 American Physical Society
Physics Subject Headings (PhySH)
Atomic, Molecular & Optical