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Super-Planckian near-field thermal emission with phonon-polaritonic hyperbolic metamaterials
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10.1063/1.4800233
/content/aip/journal/apl/102/13/10.1063/1.4800233
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/13/10.1063/1.4800233
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Sketch of the geometry of two hyperbolic multilayer materials separated by a vacuum gap with thickness d.

Image of FIG. 2.
FIG. 2.

Transmission coefficient from Eq. (5) for both SiC-SiO2 multilayer structures (a) and , and (b) for the interplate distance d = 100 nm.

Image of FIG. 3.
FIG. 3.

Spectral heat transfer coefficient defined in Eq. (4) normalized to the black-body result for both SiC-SiO2 multilayer structures (a) and , and (b) for the interplate distance d = 100 nm. Here, we choose T = 300 K. The vertical dashed lines mark the borders of the hyperbolic frequency bands and .

Image of FIG. 4.
FIG. 4.

Heat transfer coefficient h(d) from Eq. (4) as a function of interplate distance d using T = 300 K for both SiC-SiO2 multilayer structures (a) and , and (b) . The heat transfer coefficient is normalized to the black-body value . The contributions from the Bloch bands and from regions outside the Bloch bands are shown separately.

Image of FIG. 5.
FIG. 5.

Heat transfer coefficients hB , hNB , and hhm of the Bloch modes, the modes outside the Bloch bands, and the hyperbolic modes normalized to the total heat transfer coefficient as a function of distance. Again, we show both cases (a) and , and (b) , and set T = 300 K.

Image of FIG. 6.
FIG. 6.

(a) Spectral heat transfer coefficients H(ω, d) between two hyperbolic materials with SiO2 as topmost layer choosing d = 100 nm. The vertical dashed lines mark the borders of the hyperbolic frequency bands Δ1 and Δ2. (b) Heat transfer coefficients h(d) for the same materials setting T = 300 K normalized to the black-body value h BB = 6.1 W m 2 K 1. Finally in (c), we plot the relative contributions of the Bloch modes, non-Bloch modes, and the hyperbolic modes.

Image of FIG. 7.
FIG. 7.

The heat transfer coefficient for the structure with the passive material as topmost layer for different layer thicknesses l 1 = l 2 (f = 0.5) of 100 nm, 50 nm, and 5 nm normalized to the black-body value h BB = 6.1 Wm−2 K−1. We also show the result of the effective medium theory based on the permittivities in Eqs. (2) and (3) .

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/content/aip/journal/apl/102/13/10.1063/1.4800233
2013-04-03
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Super-Planckian near-field thermal emission with phonon-polaritonic hyperbolic metamaterials
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/13/10.1063/1.4800233
10.1063/1.4800233
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