We show that silicon-based metagratings capable of large-angle, multifunctional
performance can be realized using inverse freeform design. These devices consist of …

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 …

Ultra-compact, densely integrated optical components manufactured on a CMOS-foundry
platform are highly desirable for optical information processing and electronic-photonic co …

Dielectric high-contrast sub-wavelength grating (SWG) structures have received much
attention in recent years, offering a new paradigm for the integration of optical systems. Their …

Multimode silicon photonics is attracting more and more attention because the introduction
of higher-order modes makes it possible to increase the channel number for data …

The optical properties of semiconductors are typically considered intrinsic and fixed. Here
we leverage the rapid developments in the field of optical metamaterials to create ultrathin …

We report on the experimental demonstration and analysis of a new waveguide principle
using subwavelength gratings. Unlike other periodic waveguides such as line-defects in a …

Dielectric metasurfaces require high refractive index contrast materials for optimum
performance. This requirement imposes a severe restraint; either devices have been …

We demonstrate record giant birefringence, nearly twice as large as has previously been
achieved (? n_group= 1.5 over more than 60 nm of bandwidth near?= 1550 nm) using a …

Standard silicon photonic strip waveguides offer a high intrinsic refractive index contrast; this
permits strong light confinement, leading to compact bends, which in turn facilitates the …