Real-Space Observation of Ultraslow Light in Photonic Crystal Waveguides

H. Gersen, T.J. Karle, R.J.P. Engelen, R.J.P. Engelen, W. Bogaerts, Jeroen P. Korterik, N.F. van Hulst, T.F. Krauss, L. Kuipers

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Abstract

We show the real-space observation of fast and slow pulses propagating inside a photonic crystal waveguide by time-resolved near-field scanning optical microscopy. Local phase and group velocities of modes are measured. For a specific optical frequency we observe a localized pattern associated with a flat band in the dispersion diagram. During at least 3 ps, movement of this field is hardly discernible: its group velocity would be at most c/1000. The huge trapping times without the use of a cavity reveal new perspectives for dispersion and time control within photonic crystals.
Original languageUndefined
Pages (from-to)073903-1-073903-4
Number of pages4
JournalPhysical review letters
Volume94
Issue number7
DOIs
Publication statusPublished - 2005

Keywords

  • METIS-223779
  • IR-50957

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