Journal
NATURE PHOTONICS
Volume 3, Issue 4, Pages 206-210Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/NPHOTON.2009.28
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Funding
- EU-FP6 Marie Curie Fellowship
- EU-FP6 Network of Excellence ePIXnet
- EU-FP6 SPLASH project
- Australian Research Council (ARC)
- Centre of Excellence and Discovery Grant programs
- Australian Department of Education, Science and Technology
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Slow light has attracted significant interest recently as a potential solution for optical delay lines and time-domain optical signal processing(1,2). Perhaps even more significant is the possibility of dramatically enhancing nonlinear optical effects(3,4) due to the spatial compression of optical energy(5-7). Two-dimensional silicon photonic-crystal waveguides have proven to be a powerful platform for realizing slow light, being compatible with on-chip integration and offering wide-bandwidth and dispersion-free propagation(2). Here, we report the slow-light enhancement of a nonlinear optical process in a two-dimensional silicon photonic-crystal waveguide. We observe visible third-harmonic-generation at a wavelength of 520 nm with only a few watts of peak power, and demonstrate strong third-harmonic-generation enhancement due to the reduced group velocity of the near-infrared pump signal. This demonstrates yet another unexpected nonlinear function realized in a CMOS-compatible silicon waveguide.
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