High-Q coupled resonances on a PhC waveguide using a tapered nanofiber with high coupling efficiency

Tomohiro Tetsumoto, Yuta Ooka, Takasumi Tanabe

    Research output: Contribution to journalArticlepeer-review

    5 Citations (Scopus)

    Abstract

    We experimentally demonstrate high-Q cavity formation at an arbitrary position on a silicon photonic crystal waveguide by bringing a tapered nanofiber into contact with the surface of the slab. An ultrahigh Q of 5.1 × 105 is obtained with a coupling efficiency of 39%, whose resonant wavelength can be finely tuned by 27 pm by adjusting the contact length of the nanofiber. We also demonstrate an extremely high coupling efficiency of 99.6% with a loaded Q of 6.1 × 103. We show that we can obtain a coupled resonances, which has the potential to be used for slow light generation.

    Original languageEnglish
    Pages (from-to)16256-16263
    Number of pages8
    JournalOptics Express
    Volume23
    Issue number12
    DOIs
    Publication statusPublished - 2015 Jun 15

    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics

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