High-index-contrast, photonic-band-edge waveguides for tunable time delays

M. L. Povinelli; Steven G. Johnson; J. D. Joannopoulos

doi:10.1117/12.617836

12 September 2005 High-index-contrast, photonic-band-edge waveguides for tunable time delays

M. L. Povinelli, Steven G. Johnson, J. D. Joannopoulos

Proceedings Volume 5926, Tuning the Optical Response of Photonic Bandgap Structures II; 59260D (2005) https://doi.org/10.1117/12.617836
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

We describe the use of high-index-contrast, photonic-crystal wavegides for tunable time delays. The waveguide is designed such that the operating frequency is near a photonic band edge. In this slow light region, a small change in index yields a large change in group velocity, and consequently in time delay. Figures of merit for tunable time delay devices are introduced, including sensitivity, length, and dispersion. We show that a simple quadratic band model is a good predictor of the figures of merit for realistic, 3D, high-index-contrast structures. By cascading two grated waveguides, we can obtain a flat tunable time delay across the operating bandwidth.

Citation Download Citation

M. L. Povinelli, Steven G. Johnson, and J. D. Joannopoulos "High-index-contrast, photonic-band-edge waveguides for tunable time delays", Proc. SPIE 5926, Tuning the Optical Response of Photonic Bandgap Structures II, 59260D (12 September 2005); https://doi.org/10.1117/12.617836

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