Open AccessBackground-Free Nonlinear Microspectroscopy with Vibrational Molecular Interferometry
Author(s) -
E.T. Garbacik,
Jeroen P. Korterik,
Cornelis Otto,
Shaul Mukamel,
Jennifer Lynn Herek,
Herman L. Offerhaus
Publication year - 2011
Publication title -
physical review letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.688
H-Index - 673
eISSN - 1079-7114
pISSN - 0031-9007
DOI - 10.1103/physrevlett.107.253902
Subject(s) - interferometry , signal (programming language) , physics , molecular vibration , optics , amplitude , astronomical interferometer , nonlinear system , raman spectroscopy , nonlinear optical , nonlinear optics , computer science , laser , quantum mechanics , programming language
We demonstrate a method for performing nonlinear microspectroscopy that provides an intuitive and unified description of the various signal contributions, and allows the direct extraction of the vibrational response. Three optical fields create a pair of Stokes Raman pathways that interfere in the same vibrational state. Frequency modulating one of the fields leads to amplitude modulations on all of the fields. This vibrational molecular interferometry technique allows imaging at high speed free of nonresonant background, and is able to distinguish between electronic and vibrational contributions to the total signa