Vibrational phase imaging by stimulated Raman scattering via polarization-division interferometry

Carlo M. Valensise, Vikas Kumar, Alejandro De la Cadena, Sandro De Silvestri, Giulio Cerullo, Dario Polli

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Stimulated Raman scattering (SRS) allows chemical identification of substances based on their third-order nonlinear vibrational susceptibility χ(3)(ω) . In its standard single-frequency implementation, SRS can only access the imaginary part of χ(3)(ω) . Here we introduce interferometric SRS (iSRS), which has the capability to measure both the real and the imaginary parts of the nonlinear susceptibility. With respect to a standard SRS setup, iSRS simply requires the insertion of a few optical elements in the Stokes(pump) beam pathway to generate an intrinsically phase-coherent local oscillator. While preserving the acquisition speed and the simplicity of single-frequency SRS, iSRS considerably increases its information content by providing access to the vibrational phase, which allows one to distinguish overlapping species in congested spectra and is more robust with respect to noise.
Original languageEnglish (US)
Pages (from-to)19407
JournalOptics Express
Volume27
Issue number14
DOIs
StatePublished - Jun 26 2019
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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