Mode-evolution-based TE mode magneto-optical isolator using asymmetric adiabatic tapered waveguides

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Abstract
As an indispensable component in the photonic integrated circuits, the design and fabrication of optical isolators, particularly in the transverse electric (TE) polarized mode, is a long-standing challenge. Herein, we present a TE mode magneto-optical isolator using adiabatic tapered waveguides to realize conversions between designated modes. The isolator exhibits an ultranarrow structure of 1.27 μm × 1498 μm. We demonstrate that the device functions under a TE mode input with a maximum isolation ratio of 15 dB and an insertion loss of 5 dB at a wavelength of 1537.3 nm.
Funding Information
  • Core Research for Evolutional Science and Technology (JPMJCR15N6, JPMJCR18T4)
  • Japan Society for the Promotion of Science (19H02190)
  • New Energy and Industrial Technology Development Organization
  • China Scholarship Council

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