Coherent anti-Stokes Raman scattering under electric field stimulation

Erwan Capitaine, Nawel Ould Moussa, Christophe Louot, Claire Lefort, Dominique Pagnoux, Jean René Duclère, Junya F. Kaneyasu, Hideaki Kano, Ludovic Duponchel, Vincent Couderc, Philippe Leproux

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


We introduce an experiment using electro-CARS, an electro-optical method based on the combination of ultrabroadband multiplex coherent anti-Stokes Raman scattering (M-CARS) spectroscopy and electric field stimulation. We demonstrate that this method can effectively discriminate the resonant CARS signal from the nonresonant background owing to a phenomenon of molecular orientation in the sample medium. Such molecular orientation is intrinsically related to the induction of an electric dipole moment by the applied static electric field. Evidence of the electro-CARS effect is obtained with a solution of n-alkanes (CnH2n+2, 15≤n≤40), for which an enhancement of the CARS signal-to-noise ratio is achieved in the case of CH2 and CH3 symmetric/asymmetric stretching vibrations. Additionally, an electric-field-induced second-harmonic generation experiment is performed in order to corroborate the orientational organization of molecules due to the electric field excitation. Finally, we use a simple mathematical approach to compare the vibrational information extracted from electro-CARS measurements with spontaneous Raman data and to highlight the impact of electric stimulation on the vibrational signal.

Original languageEnglish
Article number245136
JournalPhysical Review B
Issue number24
Publication statusPublished - Dec 27 2016
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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