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Silicon Waveguide Optical Isolator with Directly Bonded Magneto-Optical Garnet

1
Laboratory for Future Interdisciplinary Research of Science and Technology (FIRST), Tokyo Institute of Technology, Tokyo 152-8550, Japan
2
Tokyo Institute of Technology, Tokyo 152-8550, Japan
*
Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(3), 609; https://doi.org/10.3390/app9030609
Received: 15 January 2019 / Revised: 31 January 2019 / Accepted: 3 February 2019 / Published: 12 February 2019
(This article belongs to the Special Issue Applications of Magneto-Optical Materials)
Silicon waveguide optical isolators were fabricated by direct bonding of magneto-optical (MO) garnet. The technique allowed efficient MO phase shift owing to the use of single-crystalline garnet and negligibly thin interlayer on the silicon core layer. A Mach–Zehnder interferometer (MZI) provided optical isolation utilizing the MO phase shift. High isolation, wide bandwidth, and temperature-insensitive operations had been demonstrated by tailoring the MZI design. Also, transverse electric (TE)–transverse magnetic (TM) mode converters were integrated to control operating polarization. In this paper, we reviewed these progresses on silicon waveguide optical isolators. View Full-Text
Keywords: optical isolator; integrated optics devices; waveguides optical isolator; integrated optics devices; waveguides
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MDPI and ACS Style

Shoji, Y.; Mizumoto, T. Silicon Waveguide Optical Isolator with Directly Bonded Magneto-Optical Garnet. Appl. Sci. 2019, 9, 609.

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