Observation of energy oscillation between strongly-coupled counter-propagating ultra-high Q whispering gallery modes

Wataru Yoshiki, Akitoshi Chen-Jinnai, Tomohiro Tetsumoto, Takasumi Tanabe

    Research output: Contribution to journalArticle

    11 Citations (Scopus)

    Abstract

    We report the first experimental observation of an energy oscillation between two coupled ultra-high Q whispering gallery modes in the time domain. Two counter-propagating whispering gallery modes in a silica toroid microcavity were employed for this purpose. The combination of a large coupling coefficient between the two modes and an ultra-high Q factor, which creates a large Γ value of > 10, results in a clear energy oscillation. Our measurement is based on a drop-port measurement technique, which enables us to observe the light energy in the two modes directly. The oscillation period measured in the time domain precisely matched that inferred from mode splitting in the frequency domain, and the measured results showed excellent agreement with results calculated with the developed numerical model.

    Original languageEnglish
    Pages (from-to)30851-30860
    Number of pages10
    JournalOptics Express
    Volume23
    Issue number24
    DOIs
    Publication statusPublished - 2015 Nov 30

    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics

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