Highly efficient optical filters based on quasi-3D nanostructures for spectral infrared imaging

Metamaterial-based light manipulation is crucial for advancing optical imaging and sensing in nanophotonic devices, including optoelectronic sensors and neuromorphic sensors. Traditional planar nanostructures have limited light coupling, but quasi-3D metal-dielectric nanoarrays enable enhanced light-matter interactions by generating additional resonance modes. We focus on designing quasi-3D metamaterial-based post arrays with microlens for highly efficient optical filters in the mid-infrared (MWIR) band. The optimization of these structures enhances optical efficiency and scalability, providing insights into fundamental metamaterial principles and advancing infrared imaging technologies.