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.
Translated title of the contribution | Real-space observation of ultraslow light in photonic crystal waveguides |
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Original language | English |
Pages (from-to) | 1 - 4 |
Number of pages | 4 |
Journal | Physical Review Letters |
Volume | 94 (7) |
DOIs | |
Publication status | Published - Feb 2005 |
Bibliographical note
Publisher: The American Physical SocietyOther: Images from the article appeared on the cover of the issue