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Proceedings Paper

Probing molecular absorption under slow light propagation using a photonic crystal waveguide
Author(s): Isabelle Dicaire; Alfredo De Rossi; Sylvain Combrié; Luc Thévenaz
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Paper Abstract

High-resolution infrared absorption spectroscopy of acetylene gas is demonstrated in dispersion-engineered photonic crystal waveguides under slow light propagation. Individual absorption profiles are obtained for both TE and TM polarizations for group indices ranging from 1.5 to 6.7. Experimental enhancement factors of 0.31 and 1.00 are obtained for TE and TM polarization, respectively, and are confirmed by time-domain simulations. We experimentally demonstrate that molecular absorption is a function of the electric field distribution outside the photonic crystal slab and the group index under structural slow-light illumination.

Paper Details

Date Published: 17 October 2012
PDF: 4 pages
Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84211K (17 October 2012); doi: 10.1117/12.975004
Show Author Affiliations
Isabelle Dicaire, École Polytechnique Fédérale de Lausanne (Switzerland)
Alfredo De Rossi, Thales Research and Technology (France)
Sylvain Combrié, Thales Research and Technology (France)
Luc Thévenaz, École Polytechnique Fédérale de Lausanne (Switzerland)

Published in SPIE Proceedings Vol. 8421:
OFS2012 22nd International Conference on Optical Fiber Sensors
Yanbiao Liao; Wei Jin; David D. Sampson; Ryozo Yamauchi; Youngjoo Chung; Kentaro Nakamura; Yunjiang Rao, Editor(s)

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