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Four-modes waveguide crossing utilizing phase-gradient slot array

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Abstract

A four-mode waveguide crossing is designed via phase-gradient metasurface with a compact footprint of 7.8×7.8 μm2. The insertion loss is less than 0.72 dB, and the crosstalk is below −19 dB for 1450-1650 nm.

© 2021 The Author(s)

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