2009-06-01
Ultrafast rerouting of light via slow modes in a nanophotonic directional coupler
Publication
Publication
Appl. Phys. Lett. , Volume 94 - Issue Article number: 241119 p. 1- 3
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 time is solely determined by the duration of the input pulse rather than its transit time through the device.
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| doi.org/10.1063/1.3153989 | |
| Appl. Phys. Lett. | |
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Kampfrath, T., Beggs, D. M., White, T. P., Burresi, M., van Oosten, D., Krauss, T. F., & Kuipers, K. (2009). Ultrafast rerouting of light via slow modes in a nanophotonic directional coupler. Appl. Phys. Lett., 94(Article number: 241119), 1–3. doi:10.1063/1.3153989 |
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