Abstract
AbstractResonant waveguide gratings (RWGs), also known as guided mode resonant (GMR) gratings or waveguide‐mode resonant gratings, are dielectric structures where these resonant diffractive elements benefit from lateral leaky guided modes from UV to microwave frequencies in many different configurations. A broad range of optical effects are obtained using RWGs such as waveguide coupling, filtering, focusing, field enhancement and nonlinear effects, magneto‐optical Kerr effect, or electromagnetically induced transparency. Thanks to their high degree of optical tunability (wavelength, phase, polarization, intensity) and the variety of fabrication processes and materials available, RWGs have been implemented in a broad scope of applications in research and industry: refractive index and fluorescence biosensors, solar cells and photodetectors, signal processing, polarizers and wave plates, spectrometers, active tunable filters, mirrors for lasers and optical security features. The aim of this review is to discuss the latest developments in the field including numerical modeling, manufacturing, the physics, and applications of RWGs. Scientists and engineers interested in using RWGs for their application will also find links to the standard tools and references in modeling and fabrication according to their needs.
Highlights
In 1941, Fano proposed that some anomalies may electric stripes surrounded by lower refractive index geometries, be created by the excitation of surface waves on the grating which are similar to high contrast gratings (HCGs) (Figure 1d)
Hessel and Oliner employed an original theoretical based on their physical behavior, relying on a leaky guided mode approach based on guided waves rather than on scattering and propagating over several grating grooves and ridges, rather than could explain anomalies of deep grating groove geometries us- on a particular geometry
This definition of RWG based on their ing numerical tools, corroborating the explanation proposed by physical behavior is necessary due to the continuity between corrugated waveguide geometries and discrete ribbon geometry as
Summary
We define RWGs surface.[3] Hessel and Oliner employed an original theoretical based on their physical behavior, relying on a leaky guided mode approach based on guided waves rather than on scattering and propagating over several grating grooves and ridges, rather than could explain anomalies of deep grating groove geometries us- on a particular geometry. This definition of RWG based on their ing numerical tools, corroborating the explanation proposed by physical behavior is necessary due to the continuity between corrugated waveguide geometries and discrete ribbon geometry as
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