title: Narrowband thermal emission from a uniform tungsten surface critically coupled with a photonic crystal guided resonance.
abstract: We numerically demonstrate narrowband thermal emission with unity emissivity peak in the near-infrared range by critically coupling a flat tungsten surface with guided resonances of a dielectric photonic crystal slab. The tungsten surface is separated from the photonic crystal slab by a vacuum gap. The structure possesses significant tunability for both the center frequency and the linewidth of the thermal emission band. Moreover, the tungsten surface, being un-structured, should exhibit enhanced thermal stability at elevated temperature as compared to tungsten nanostructures.
authors.forename: Yu
authors.initials: Y
authors.lastname: Guo
authors.forename: Shanhui
authors.initials: S
authors.lastname: Fan