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Authors: H. Zhao, S. Clemmen, A. Raza, R. Baets
Title: Stimulated Raman spectroscopy of analytes evanescently probed by a silicon nitride photonic integrated waveguide
Format: International Journal
Publication date: 3/2018
Journal/Conference/Book: Optics Letters
Volume(Issue): 43(6) p.1403-1406
Internal Reference: [N-2176]
DOI:
Download: Download this Publication (1.5MB) (1.5MB)

Abstract

We report, to the best of our knowledge, the first demonstration of stimulated Raman spectroscopy enhanced by a nanophotonic integrated circuit. The Raman response of low-concentration dimethyl sulfoxide is evanescently probed via centimeter-long wire waveguides. A signal enhancement of close to five orders of magnitude, as compared to the case of on-chip spontaneous Raman scattering, is demonstrated. This significant enhancement factor allows for the use of continuous-wave lasers with milliwatt-level power and uncooled detectors and, therefore, sets the basis of future all-on-a-chip Raman spectrometers suitable for both gas and liquid detection.

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