Magneto-optical isolator with silicon waveguides fabricated by direct bonding

Yuya Shoji, Tetsuya Mizumoto, Hideki Yokoi, I. Wei Hsieh, Richard M. Osgood

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288 Citations (Scopus)


A magneto-optical isolator is demonstrated for use with a Si waveguide. The isolator is based on a Mach-Zehnder interferometer employing a nonreciprocal phase shift and is fabricated by bonding a magneto-optic garnet Ce Y2 Fe5 O12 (Ce:YIG) directly onto the Si waveguide. The surface-activated bonding is based on oxygen-plasma exposure in a high-vacuum chamber. The nonreciprocal phase shift is observed by applying an external magnetic field. An isolation ratio of 21 dB is obtained at a wavelength of 1559 nm.

Original languageEnglish
Article number071117
JournalApplied Physics Letters
Issue number7
Publication statusPublished - 2008

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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