Article,

Subwavelength grating crossings for silicon wire waveguides

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Optics Express, 18 (15): 16146 (July 2010)
DOI: 10.1364/OE.18.016146

Abstract

We report on the design, simulation and experimental demonstration of a new type of waveguide crossing based on subwavelength gratings in silicon waveguides. We used 3D finite-difference time-domain simulations to minimize loss, crosstalk and polarization dependence. Measurement of fabricated devices show that our waveguide crossings have a loss as low as 鈭�.023 dB/crossing, polarization dependent loss of < 0.02 dB and crosstalk <-40 dB.

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