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Enhanced all-optical tuning of leaky eigenmodes in photonic crystal waveguides

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Abstract

We demonstrate all-optical switching in an active two-dimensional photonic crystal waveguide, observing as large as 16nm blueshifts of a leaky eigenmode at 839nm and switching ratios of almost 70%. These results are larger than those previously observed in similar experiments performed on passive photonic crystal waveguides; the enhancement is due to resonant photogeneration of carriers by In0.12Al0.2Ga0.68As quantum wells in the core of the waveguide. The effective change in the refractive index of the structure is 102, with a rise time of 1ps and a decay time of 10ps, potentially allowing high-speed switching and fast modulation rates.

© 2006 Optical Society of America

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