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Authors: H. Becker, C.J. Krückel, D. Van Thourhout, M.J.R. Heck
Title: Out-of-Plane Focusing Grating Couplers for Silicon Photonics Integration With Optical MRAM Technology
Format: International Journal
Publication date: 8/2018
Journal/Conference/Book: IEEE Journal on Selected Topics in Quantum Electronics
Volume(Issue): 26(2) p.1-8
DOI: 10.1109/JSTQE.2019.2933805
Citations: 6 ( - last update: 1/3/2021)
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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 220nm 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 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 2D FGCs.

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