| Authors: | H. Gersen, T.J. Karle, R.J.P. Engelen, W. Bogaerts, J.P. Korterik, N.F. van Hulst, T.F. Krauss, L. Kuipers | | Title: | Real space observation of ultraslow light in photonic crystal waveguides. | | Format: | International Journal | | Publication date: | 2/2005 | | Journal/Conference/Book: | Physics Review Letters
| | Volume(Issue): | 94(7) p.073903 | | DOI: | 10.1103/physrevlett.94.073903 | | Citations: | 432 (Dimensions.ai - last update: 24/11/2024)
309 (OpenCitations - last update: 3/5/2024)
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Abstract
We show the real space observation of fast and slow pulses propagating inside a photonic crys-
tal waveguide by time-resolved Near-¯eld Scanning Optical Microscopy. Local phase and group
velocities of modes are measured. For a speci¯c optical frequency we observe a localized pattern
associated with a °at band in the dispersion diagram. During at least 3 ps movement of this ¯eld is
hardly discernable: 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. Related Research Topics
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