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Third-harmonic generation in slow-light chalcogenide glass photonic crystal waveguides

Christelle Monat, Marcel Spurny, Christian Grillet, Liam O’Faolain, Thomas F. Krauss, Benjamin J. Eggleton, Douglas Bulla, Steve Madden, and Barry Luther-Davies

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Abstract

We demonstrate third-harmonic generation (THG) in a dispersion-engineered slow-light photonic crystal waveguide fabricated in AMTIR-1 chalcogenide glass. Owing to the relatively low loss and low dispersion in the slow- light (c/30) regime, combined with the high nonlinear figure of merit of the material (∼2), we obtain a rela tively large conversion efficiency (1.4×10−8/W2), which is 30× higher than in comparable silicon waveguides, and observe a uniform visible light pattern along the waveguide. These results widen the number of applications underpinned by THG in slow-light platforms, such as the direct observation of the spatial evolution of the propagating mode.

© 2011 Optical Society of America

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