Out-of-Plane Focusing Grating Couplers for Silicon Photonics Integration with Optical MRAM Technology

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We present the design methodology and experimental characterization of compact out-of-plane focusing grating couplers for integration with magnetoresistive random access memory technology. Focusing grating couplers have recently found attention as layer-couplers for photonic-electronic integration. The components we demonstrate are designed for a wavelength of 1550 nm, fabricated in a standard 220 nm SOI photonic platform and optimized given the fabrication restrictions for standard 193-nm UV lithography. For the first time, we extend the design based on the phase matching condition to a two-dimensional (2-D) grating design with two optical input ports. We further present the experimental characterization of the focusing behaviour by spatially probing the emitted beam with a tapered-and-lensed fiber and demonstrate the polarization controlling capabilities of the 2-D FGCs.

Original languageEnglish
Article number8300408
JournalIEEE Journal on Selected Topics in Quantum Electronics
Pages (from-to)1-8
Number of pages8
Publication statusPublished - 2020

    Research areas

  • FDTD, photonic integrated circuits, photonic-electronic integration, polarization, silicon photonics, vertical focusing grating couplers

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