Control over emissivity of zero-static-power thermal emitters based on phase-changing material GST.

ABSTRACT: Controlling the emissivity of a thermal emitter has attracted growing interest, with a view toward a new generation of thermal emission devices. To date, all demonstrations have involved using sustained external electric or thermal consumption to maintain a desired emissivity. In the present study, we demonstrated control over the emissivity of a thermal emitter consisting of a film of phase-changing material Ge₂Sb₂Te₅ (GST) on top of a metal film. This thermal emitter achieves broad wavelength-selective spectral emissivity in the mid-infrared. The peak emissivity approaches the ideal blackbody maximum, and a maximum extinction ratio of >10 dB is attainable by switching the GST between the crystalline and amorphous phases. By controlling the intermediate ph

SUBMITTER: Du KK 

PROVIDER: S-EPMC6061892 | biostudies-literature | 2017 Jan

REPOSITORIES: biostudies-literature