Periodic structures with a sub‐wavelength pitch have been known since Hertz conducted his
first experiments on the polarization of electromagnetic waves. While the use of these …

Silicon photonics is playing a key role in areas as diverse as high-speed optical
communications, neural networks, supercomputing, quantum photonics, and sensing, which …

Coupling of light to and from integrated optical circuits has been recognized as a major
practical challenge since the early years of photonics. The coupling is particularly difficult for …

Silicon photonic biosensors hold the potential for highly accurate, yet low cost point-of-care
devices. Maximizing the sensitivity of the sensing chips while reducing the complexity and …

Grating couplers are key elements enabling the coupling of light between planar waveguide
circuits and optical fibers. In this work, it is demonstrated using simulations and experiments …

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 …

As most integrated optics platforms, silicon offers only a fixed set of material refractive
indices for designing devices. The ability of sub-wavelength patterned structures to …

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 …

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

We investigate the waveguide dispersion of subwavelength structures, and propose that the
waveguide dispersion can be reduced by reducing the period of subwavelength structures …