Abstract: Metamaterials may be utilized to facilitate conversion of hydrogen sulfide into elemental hydrogen and elemental sulfur in the presence of suitable photocatalyst particles. Photoreactor systems utilizing metamaterials may comprise a flow-through reaction space having at least one metamaterial-catalyst surface. The at least one metamaterial-catalyst surface comprises a metamaterial surface having a plurality of resonators patterned thereon and a plurality of photocatalyst particles located upon at least a portion of the resonators, within a gap between a first region and a second region of one or more resonators, or within a gap between adjacent resonators. The plurality of photocatalyst particles comprise at least one photocatalyst effective to convert hydrogen sulfide into elemental hydrogen and elemental sulfur upon exposure to electromagnetic radiation.