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Optica Publishing Group
  • Chinese Optics Letters
  • Vol. 15,
  • Issue 3,
  • pp. 032301-
  • (2017)

Multimode-interference-based crossing for metal-insulator-metal waveguides

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Abstract

We report a waveguide crossing based on a multimode-interference (MMI) structure for metal-insulator-metal (MIM) waveguides. The MMI-based crossing comprises two orthogonal intersecting MMI waveguides that are connected to the single-mode input/output waveguide symmetrically. Single self-images are formed at the crossing center and output plane of the MMI waveguide, thereby mitigating the crosstalk and improving the throughput. The characteristics of the proposed MMI-based crossing are investigated with the finite element method of Comsol Multiphysics. The results show that the throughput reaches −1.8 dB and the crosstalk is less than −46 dB at the wavelength of 1550 nm.

© 2017 Chinese Laser Press

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