Enhancement of the Raman Effect by Infrared Pumping

V. Yu. Shishkov, E. S. Andrianov, A. A. Pukhov, A. P. Vinogradov, and A. A. Lisyansky

Phys. Rev. Lett. 122, 153905 – Published 18 April 2019

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

Physics Subject Headings (PhySH)

Stimulated Raman scattering

Raman spectroscopy

Atomic, Molecular & Optical

Authors & Affiliations

V. Yu. Shishkov^1,2, E. S. Andrianov¹, A. A. Pukhov^1,2, A. P. Vinogradov^1,2, and A. A. Lisyansky³

¹Dukhov Research Institute of Automatics (VNIIA), 22 Sushchevskaya, Moskow 127055, Russia and Moscow Institute of Physics and Technology, 9 Institutskiy per., Dolgoprudny 141700, Moscow region, Russia
²Institute for Theoretical and Applied Electromagnetics, 13 Izhorskaya, Moscow 125412, Russia
³Department of Physics, Queens College of the City University of New York, Flushing, New York 11367, USA and The Graduate Center of the City University of New York, New York, New York 10016, USA