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Creators/Authors contains: "Yun, Hyeong Seok"

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  1. ; ; ; ; ; ; ; ; ; ; et al (, Nature Communications)
    Free, publicly-accessible full text available December 1, 2026
  2. ; ; ; ; ; ; (, Applied Physics Letters)
    Nanoantennas and their arrays (metasurfaces) provide a versatile platform for controlling the coherence of thermal emission. Conventional designs rely on global heating, which impedes emission efficiency and on-chip integration. In this work, we propose an electrically driven metasurface composed of a Yagi-Uda nanoantenna array interconnected by S-shaped electrode wires, which enables the concurrent manipulation of thermal emission spectrally and directionally. A direct simulation approach based on the Wiener-chaos expansion method is employed for quantitative analysis. Our metasurface device exhibits a narrowband emission with high directivity, which is one order higher than that of a single nanorod antenna case. The modeling framework established in this work opens a promising route for realizing coherent mid-infrared emission by metasurfaces. 
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  3. ; ; ; ; ; ; ; (, Physical Review Applied)
    Full Text Available