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    Ultrafast Tunable Near-Field Radiative Thermal Modulator Made of Ge3Sb2Te6

    Source: Journal of Heat Transfer:;2019:;volume( 141 ):;issue: 007::page 72701
    Author:
    Lu, Lu
    ,
    Song, Jinlin
    ,
    Zhou, Kun
    ,
    Ou, Han
    ,
    Cheng, Qiang
    ,
    Luo, Zixue
    DOI: 10.1115/1.4043573
    Publisher: American Society of Mechanical Engineers (ASME)
    Abstract: We show numerically the phase change material Ge3Sb2Te6 (GST) with special configuration as a heat modulator in the regime of near-field radiative heat transfer (NFRHT). The ability of GST to allow ultrafast reversible switch between two phases endows it great potential in practical modulation application. By designing silicon carbide (SiC) nanoholes (NHs) filled with GST, this configuration could achieve a considerable modulation effect and large near-field radiative heat flux. The underlying mechanism can be explained by the observation that the entire configuration supports either hyperbolic modes or surface phonon polaritons (SPhPs) resonance modes and even the combination of both modes, thereby resulting in the remarkable modulation effect. In addition, the effects of the volume filling factor and graphene coverage are also investigated at the vacuum gap distance of 100 nm. With graphene coverage, the modulation factor can be further improved to as high as 0.72 achieved at the volume filling factor of 0.6 with temperature difference of 20 K. The proposed configuration has the potential to effectively modulate heat in the near-field regime for designing heat modulation applications in the future.
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      Ultrafast Tunable Near-Field Radiative Thermal Modulator Made of Ge3Sb2Te6

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4257900
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    contributor authorLu, Lu
    contributor authorSong, Jinlin
    contributor authorZhou, Kun
    contributor authorOu, Han
    contributor authorCheng, Qiang
    contributor authorLuo, Zixue
    date accessioned2019-09-18T09:00:58Z
    date available2019-09-18T09:00:58Z
    date copyright5/14/2019 12:00:00 AM
    date issued2019
    identifier issn0022-1481
    identifier otherht_141_07_072701
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4257900
    description abstractWe show numerically the phase change material Ge3Sb2Te6 (GST) with special configuration as a heat modulator in the regime of near-field radiative heat transfer (NFRHT). The ability of GST to allow ultrafast reversible switch between two phases endows it great potential in practical modulation application. By designing silicon carbide (SiC) nanoholes (NHs) filled with GST, this configuration could achieve a considerable modulation effect and large near-field radiative heat flux. The underlying mechanism can be explained by the observation that the entire configuration supports either hyperbolic modes or surface phonon polaritons (SPhPs) resonance modes and even the combination of both modes, thereby resulting in the remarkable modulation effect. In addition, the effects of the volume filling factor and graphene coverage are also investigated at the vacuum gap distance of 100 nm. With graphene coverage, the modulation factor can be further improved to as high as 0.72 achieved at the volume filling factor of 0.6 with temperature difference of 20 K. The proposed configuration has the potential to effectively modulate heat in the near-field regime for designing heat modulation applications in the future.
    publisherAmerican Society of Mechanical Engineers (ASME)
    titleUltrafast Tunable Near-Field Radiative Thermal Modulator Made of Ge3Sb2Te6
    typeJournal Paper
    journal volume141
    journal issue7
    journal titleJournal of Heat Transfer
    identifier doi10.1115/1.4043573
    journal fristpage72701
    journal lastpage072701-8
    treeJournal of Heat Transfer:;2019:;volume( 141 ):;issue: 007
    contenttypeFulltext
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