Surface grating couplers are fundamental components in chip-based photonic devices to
couple light between photonic integrated circuits and optical fibers. In this work, we report on …

The availability of low-loss optical interfaces to couple light between standard optical fibers
and high-index-contrast silicon waveguides is essential for the development of chip …

Efficient fiber-chip coupling interfaces are critically important for integrated photonics. Since
surface gratings diffract optical signals vertically out of the chip, these couplers can be …

Silicon photonics provides wafer‐scale fabrication of densely integrated photonic circuits
that are enabling breakthrough applications in datacom, artificial intelligence, and …

Surface grating couplers enable efficient coupling of light between optical fibers and
nanophotonic waveguides. However, in conventional grating couplers, the radiation angle is …

High efficiency diffractive grating structures to interface a single mode optical fiber and a
nanophotonic integrated circuit fabricated on silicon-on-insulator are presented. The …

We present the design, fabrication and characterization of efficient fiber-to-chip grating
couplers on a Germanium-on-Silicon (Ge-on-Si) and Germanium-on-silicon-on-insulator (Ge …

Grating couplers enable position-friendly interfacing of silicon chips by optical fibers. The
conventional coupler designs call upon comparatively complex architectures to afford …

We demonstrate fully-etched fiber-waveguide grating couplers with sub-wavelength gratings
showing high coupling efficiency as well as low back reflections for both transverse electric …

We report, for the first time, on the design and experimental demonstration of fiber-chip
surface grating couplers based on subwavelength grating engineered nanostructure …