TuA4.1 - CAVITY-RESONATOR-INTEGRATED GRATING COUPLERS
Abstract
Abstract
Integration of a waveguide resonator can reduce an aperture of a grating coupler to enable its utilization in a channel waveguide. Resultantly obtained coupling characteristics such as selectivity or controllability are attractive for various applications including a compact WDM light source and micro-optic beam steering.
TuA4.2 - Electromagnetic and Photonic Applications of Spatially-Variant Lattices
Abstract
Abstract
Spatially-variant lattices (SVLs) are periodic structures that are bent, twisted, or otherwise functionally-graded in a manner that minimizes deformations to the unit cells. SVLs have been shown to unlock new physical mechanisms and provide extraordinary control over fields and waves.TuA4.3 - NONMAGNETIC LINEAR OPTICAL NONRECIPROCITY IN ACOUSTICALLY DRIVEN RESONANT WAVEGUIDE GRATINGS
Abstract
Abstract
Nonmagnetic nonreciprocal linear optical response is predicted for acoustically driven resonant waveguide gratings. In a narrow spectral range around the resonance the structure can be completely transparent for a light wave propagating in one direction and highly reflective in the opposite direction.
TuA4.4 - LWIR GUIDED-MODE RESONANT METAMATERIAL DEVICES
Abstract
Abstract
The long-wave IR spectral region spanning ~3 to 13 μm contains spectral bands useful for many scientific and industrial applications. We discuss design, fabrication, and testing of example devices based on guided-mode resonant metamaterials.
TuA4.5 - NON-RECIPROCAL GRAPHENE GRATINGS BASED ON SPATIOTEMPORAL MODULATION
Abstract
Abstract
A nonreciprocal graphene grating based on temporal modulation is presented. Only three distinct modulation regions are necessary, relaxing the fabrication requirements. Simulations show very large isolation with moderate insertion loss, making the structure suitable for THz applications.
TuA4.6 - BOUND STATES IN THE CONTINUUM IN SYMMETRIC DOUBLE-SIDED GRATING METAMATERIALS
Abstract
Abstract
We study quasi-bound states in the continuum with diverging resonance lifetime and vanishing resonant linewidth in a novel double-sided grating metamaterial. With rigorous computations, we corroborate that specific physical conditions are required to obtain the diverging resonance quality factor.