Kampfrath, Tobias; Beggs, D. M.; White, T. P.; Burresi, M.; van Oosten, D.; Krauss, T. F.; Kuipers, L.
We demonstrate that two coupled photonic-crystal waveguides can route two subsequently arriving light pulses to different output ports even though the pulses are only 3 ps apart. This rerouting of light is due to an ultrafast shift in the transmittance spectrum triggered by the generation of electrons and holes in the Si base material by a femtosecond laser pulse. The use of slow-light modes allows for a coupler length of only 5.2 μm. Since these modes are not directly involved, the 3 ps dead...[Show more]
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