Tunable guided resonance in twisted bilayer photonic crystal
Beicheng Lou, Benjamin Wang, Jesse A. Rodríguez, Mark Cappelli, Shanhui Fan
Abstract
We experimentally demonstrate tunable guided resonance in twisted bilayer photonic crystals. Both the numerically and the experimentally obtained transmission spectra feature resonances with frequencies strongly dependent on the twist angle, as well as resonances with frequencies that are largely independent of the twist angle. These resonant features can be well understood with a simple analytic theory based on band folding. Our work illustrates the rich tunable resonance physics in twisted bilayer systems.
Topics & Concepts
BilayerResonance (particle physics)Photonic crystalTwistFolding (DSP implementation)Guided-mode resonancePhotonicsMaterials scienceFano resonanceWork (physics)Molecular physicsOpticsPhysicsCondensed matter physicsOptoelectronicsChemistryWavelengthAtomic physicsGeometryPlasmonQuantum mechanicsMembraneDiffraction gratingMathematicsBiochemistryEngineeringElectrical engineeringPhotonic Crystals and ApplicationsOptical Coatings and GratingsNear-Field Optical Microscopy