Electromagnetic coupling via an evanescent field or radiative wave is a primary
characteristic of light, allowing optical signal/power transfer in a photonic circuit but limiting …

Electromagnetic coupling is ubiquitous in photonic systems and transfers optical signals
from one device to the other, creating crosstalk between devices. While this allows the …

Subwavelength grating (SWG) waveguides are integrated photonic structures with a pitch
substantially smaller than wavelength for which they are designed, so that diffraction effects …

Sub-wavelength grating (SWG) metamaterials have garnered a great interest for their
singular capability to shape the propagation of light. However, practical SWG …

Two independent significant developments have challenged our understanding of light-
matter interaction, one, involves the artificially structured materials known as metamaterials …

We investigate the coupling between bright and quasi-dark eigenmodes in a planar
metamaterial supporting highly dispersive transparency. The specific design of such a …

We applied nonlinear optimization to design nanophotonics-based metamaterials for
efficient free-space-to-waveguide coupling. Three devices were designed, fabricated and …

We report on the comprehensive experimental characterization of optical crosstalk between
waveguides caused by scattering. Our results reveal that a strong power exchange between …

We report that metamaterial-inspired one-dimensional gratings (or metagratings) can be
used to control nonpropagating diffraction orders as well as propagating ones. By accurate …

We present a novel concept which enables the realization of unidirectional and irreversible
grating assisted couplers by using gain-loss modulated medium to eliminate the reversibility …