Fano resonance control in a photonic crystal structure and its application to ultrafast switching

Yi Yu, Mikkel Heuck, Hao Hu, Weiqi Xue, Christophe Peucheret, Yaohui Chen, Leif Katsuo Oxenløwe, Kresten Yvind, Jesper Mørk

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    We experimentally demonstrate a photonic crystal structure that allows easy and robust control of the Fano spectrum. Its operation relies on controlling the amplitude of light propagating along one of the light paths in the structure from which the Fano resonance is obtained. Short-pulse dynamic measurements show that besides drastically increasing the switching contrast, the transmission dynamics itself is strongly affected by the nature of the resonance. The influence of slow-recovery tails implied by a long carrier lifetime can thus be reduced using a Fano resonance due to a hitherto unrecognized reshaping effect of the nonlinear Fano transfer function. As an example, we present a system application of a Fano structure, demonstrating its advantages by the experimental realiza- tion of 10 Gbit/s all-optical modulation with optical control power less than 1mW.
    Original languageEnglish
    JournalApplied Physics Letters
    Volume105
    Issue number6
    Pages (from-to)061117
    Number of pages6
    ISSN0003-6951
    DOIs
    Publication statusPublished - 2014

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