未分類

研究成果61

A metamaterial to convert heat to light
Yosuke Ueba and Junichi Takahara
SPIE Newsroom 10.1117/2.1201310.005129

An array of split-ring resonators efficiently absorbs and re-emits thermal energy as IR radiation to power thermophotovoltaic (TPV) systems. We have designed, constructed, and tested a metamaterial made of an array of SRRs that is an effective heat–light converter with a controllable spectrum and low heat capacity.

(a) Measured thermal radiation spectra of the SRRs and the substrate. (b) Simulated electric field distributions in the SRR structure at the peak positions in (a). Ex and Ey are linear polarizations that are parallel and perpendicular to the SRR gap, respectively. kz is the direction of the radiation, which is normal to the substrate. au: Arbitrary units. m: Mode number.