Real-space observation of ultraslow light in photonic crystal waveguides

H Gersen, TJ Karle, RJP Engelen, W Bogaerts, JP Korterik, NF van Hulst, TF Krauss, L Kuipers

Research output: Contribution to journalArticle (Academic Journal)peer-review

513 Citations (Scopus)
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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 contributionReal-space observation of ultraslow light in photonic crystal waveguides
Original languageEnglish
Pages (from-to)1 - 4
Number of pages4
JournalPhysical Review Letters
Volume94 (7)
Publication statusPublished - Feb 2005

Bibliographical note

Publisher: The American Physical Society
Other: Images from the article appeared on the cover of the issue


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