Two-Photon Infrared Resonance Can Enhance Coherent Raman Scattering

Physical Review Letters
Andrew J TraversoVladislav V Yakovlev

Abstract

In this Letter we present a new technique for attaining efficient low-background coherent Raman scattering where the Raman coherence is mediated by a tunable infrared laser in two-photon resonance with a chosen vibrational transition. In addition to the traditional benefits of conventional coherent Raman schemes, this approach offers a number of advantages including potentially higher emission intensity, reduction of nonresonant four-wave mixing background, preferential excitation of the anti-Stokes field, and simplified phase matching conditions. In particular, this is demonstrated in gaseous methane along the ν_{1} (A_{1}) and ν_{3} (T_{2}) vibrational levels using an infrared field tuned between 1400 and 1600  cm^{-1} and a 532-nm pump field. This approach has broad applications, from coherent light generation to spectroscopic remote sensing and chemically specific imaging in microscopy.

References

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Apr 14, 2007·Science·Dmitry PestovMarlan O Scully
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Citations

Dec 24, 2019·Physical Review Letters·Yu GuoFranco Nori
May 2, 2020·Physical Review Letters·Zhenhuan YiVladislav V Yakovlev
May 2, 2020·Physical Review Letters·V Yu ShishkovA A Lisyansky
Jan 16, 2019·Optics Express·R U DinM S Zubairy
Jun 6, 2019·Optics Express·Tuguldur Kh BegzjavGirish S Agarwal
May 6, 2019·Physical Review Letters·V Yu ShishkovA A Lisyansky
Aug 25, 2021·Nano Letters·Yubin FanShumin Xiao

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