Coherent thermal emission near 10.6 μ m mediated by localized phonon-polariton modes in microparticle arrays

Abstract

I study the thermal emission properties of periodic multilayer arrays of subwavelength particles made of silicon carbide embedded in a zinc selenide host medium. A unique interplay between the intrinsic phonon-polariton resonance of the single particle and the field thermally emitted from the different arrays of particles gives rise to a comb of highly coherent absorption/emissivity lines around 10.6 μm, ensuing ideal conditions to achieve long-wave infrared coherent sources.