Ultrafast rerouting of light via slow modes in a nanophotonic directional coupler
Anno: 2009
Autori: Kampfrath T., Beggs D. M., White T. P., Burresi M., Oosten van D, Krauss T.F.,
Kuipers L.
Affiliazione autori: FOM Institute AMOLF, Science Park 113, 1098 XG Amsterdam, The Netherlands;
School of Physics and Astronomy, University of St. Andrews, St. Andrews, Fife KY16 9SS, United Kingdom
Abstract: 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 m. 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.
Giornale/Rivista: APPLIED PHYSICS LETTERS
Volume: 94 (24) Da Pagina: 241119-1 A: 241119-3
Parole chiavi: photonic crystals; all-optical devices; Citazioni: 14dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-05-12Riferimenti tratti da Isi Web of Knowledge: (solo abbonati)