물리학과

Metasurfaces are ultra-compact nanophotonic platforms that enable versatile manipulation of light at subwavelength scales, offering remarkable control over amplitude, phase, direction and polarization. Beyond conventional materials such as silicon and dielectric material, metasurfaces based on emerging materials have recently been explored to realize novel and multifunctional optical responses. Here, we introduce novel fabrication approaches for bilayer metasurfaces with 2D materials and etch-free metasurfaces with organic molecular materials. Using stacking techniques of 2D materials, we demonstrate bilayer nanophotonic structures and reveal emergent phenomena such as unidirectional guided resonances and chiral photonic flat bands. In addition, we show highly coherent lasing emission from metasurfaces composed entirely of 2D materials or organic materials. These results highlight the potential of emerging material platforms to expand the design space and functionality of next-generation metasurfaces.