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Authors: A. Dhakal, P.C. Wuytens, F. Peyskens, A. Subramanian, N. Le Thomas, R. Baets
Title: Raman spectroscopy using photonic waveguides
Format: International Conference Proceedings
Publication date: 11/2013
Journal/Conference/Book: IPS Benelux 2013
Editor/Publisher: IEEE Photonics Society, 
Location: Eindhoven, Netherlands
Download: Download this Publication (5.5MB) (5.5MB)

Abstract

We propose to use silicon nitride (Si3N4) based photonic waveguides in a lab-on-a-chip
context for Raman spectroscopy. The evanescent tail of the guided modes can efficiently
excite Raman active molecules located in the cladding of a waveguide. Similarly, a
significant fraction of the total emitted Stokes power is evanescently coupled to the
same mode. We calculate the spontaneous Raman scattering efficiency as a function of
Si3N4 strip waveguide dimensions and show that under typical conditions, the efficiency
is in the order of 10-8. Preliminary experimental results are reported, as the first
demonstration of waveguide assisted Raman spectroscopy (to the best of our
knowledge).

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