Thermal hyperconductivity: Radiative energy transport in hyperbolic media

Liu, J.; Narimanov, Evgenii E.

doi:10.1103/physrevb.91.041403

Cited by 17 publications

(14 citation statements)

References 34 publications

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“…Furthermore, it has been shown that HM can be used for near-field thermophotovoltaic applications [51,52], which HM have a large penetration depth of thermal radiation [53,54], which is an advantage also for the transport of near-field thermal radiation over far-field distances [55]. In addition, the possibility of having larger conduction by thermal radiation inside an HM than conduction by phonons and electrons has been discussed [56] as well as the thermodynamical potentials, the general laws of thermal radiation inside HM [57] and the coherence properties in the vicinity of HM [58]. Recently, also tunable hyperbolic thermal emitters have been introduced [59], and it was proposed to make the use of the hyperbolic 2D plasmons in graphene ribbons for elevated near-field heat fluxes [60].…”

Section: Introductionmentioning

confidence: 99%

Near-Field Heat Transfer between Multilayer Hyperbolic Metamaterials

Biehs

Ben‐Abdallah

2016

Zeitschrift Für Naturforschung A

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Abstract:We review the near-field radiative heat flux between hyperbolic materials focusing on multilayer hyperbolic meta-materials. We discuss the formation of the hyperbolic bands, the impact of ordering of the multilayer slabs, as well as the impact of the first single layer on the heat transfer. Furthermore, we compare the contribution of surface modes to that of hyperbolic modes. Finally, we also compare the exact results with predictions from effective medium theory.

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Section: Introductionmentioning

confidence: 99%

Near-Field Heat Transfer between Multilayer Hyperbolic Metamaterials

Biehs

Ben‐Abdallah

2016

Zeitschrift Für Naturforschung A

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“…2(a), but now with lower doping for the InAs layer ( ). Using an ultrafast optical pump, we can rapidly produce a large density (~3 19 cm 10 2 - ) of photo carriers that will be trapped within the quantum wells (i.e., the doped layers). In this manner the quantum wells are rapidly switched from dielectric to metallic behavior at the frequencies of interest, and the superlattice structure will switch from elliptic to hyperbolic dispersion.…”

Section: Ultrafast Topological Transitions In Shmsmentioning

confidence: 99%

“…In addition, SHMs allow for new phenomena such as ultrafast creation of the hyperbolic manifold through optical pumping. In particular, we examine the possibility of achieving ultrafast topological transitions through optical pumping which can photo-dope appropriately designed quantum wells on the femtosecond time scale.Thus, it is expected that SHMs will exhibit an increased momentum range over which they exhibit hyperbolic dispersion when compared to MHMs at visible frequencies [18,19].Our first objective in this paper is to employ both the effective medium approximation (EMA) and Bloch theory [20,21] to compare the dispersion properties of SHMs at mid-infrared frequencies and MHMs at visible frequencies. This analysis will allow us to clearly establish the conditions under which the EMA can be applied safely for both MHMs and SHMs.…”

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confidence: 99%

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Realizing high-quality, ultralarge momentum states and ultrafast topological transitions using semiconductor hyperbolic metamaterials

Campione¹,

Luk²,

Liu³

et al. 2015

J. Opt. Soc. Am. B

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We employ both the effective medium approximation (EMA) and Bloch theory to compare the dispersion properties of semiconductor hyperbolic metamaterials (SHMs) at mid-infrared frequencies and metallic hyperbolic metamaterials (MHMs) at visible frequencies. This analysis reveals the conditions under which the EMA can be safely applied for both MHMs and SHMs. We find that the combination of precise nanoscale layering and the longer infrared operating wavelengths puts the SHMs well within the effective medium limit and, in contrast to MHMs, allows the attainment of very high photon momentum states. In addition, SHMs allow for new phenomena such as ultrafast creation of the hyperbolic manifold through optical pumping. In particular, we examine the possibility of achieving ultrafast topological transitions through optical pumping which can photo-dope appropriately designed quantum wells on the femtosecond time scale.Thus, it is expected that SHMs will exhibit an increased momentum range over which they exhibit hyperbolic dispersion when compared to MHMs at visible frequencies [18,19].Our first objective in this paper is to employ both the effective medium approximation (EMA) and Bloch theory [20,21] to compare the dispersion properties of SHMs at mid-infrared frequencies and MHMs at visible frequencies. This analysis will allow us to clearly establish the conditions under which the EMA can be applied safely for both MHMs and SHMs. Next, we will examine the possibility of transiently inducing or destroying hyperbolic behavior through optical pumping. In this way, we can optically induce electrons to populate or leave the doped layers [22,23] of the SHMs and achieve ultrafast topological transitions. Dispersion properties of SHMs: Effective medium approximation and Bloch theoryAccording to the EMA, a HM made of alternating doped/undoped semiconductor materials or metal/dielectric materials (with relative permittivities d

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“…Recently, heat transport in many-body systems has also been considered in the context of nanoparticles [7][8][9][10] and multilayer geometries, such as photonic crystals [11,12] and hyperbolic metamaterials [13][14][15]. The focus of much of this work has been the study of systems in which the steady-state temperature distribution of a set of internal bodies is a priori known and dictated via contact with large heat reservoirs.…”

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confidence: 99%

Ballistic near-field heat transport in dense many-body systems

et al. 2018

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Radiative heat-transport mediated by near-field interactions is known to be superdiffusive in dilute, many-body systems. In this Letter we use a generalized Landauer theory of radiative heat transfer in many-body planar systems to demonstrate a nonmonotonic transition from superdiffusive to ballistic transport in dense systems. We show that such a transition is associated to a change of the polarization of dominant modes, leading to dramatically different thermal relaxation dynamics spanning over three orders of magnitude. This result could have important consequences on thermal management at nanoscale of many-body systems.The theory of near-field radiative heat transfer has for many decades remained largely limited to two-body systems [1][2][3][4][5][6]. Recently, heat transport in many-body systems has also been considered in the context of nanoparticles [7][8][9][10] and multilayer geometries, such as photonic crystals [11,12] and hyperbolic metamaterials [13][14][15]. The focus of much of this work has been the study of systems in which the steady-state temperature distribution of a set of internal bodies is a priori known and dictated via contact with large heat reservoirs. There are, however, situations in which a full study of heat transport necessitates an account of thermal relaxation through radiative channels. A first step in this direction has been made by generalizing Rytov's theory of fluctutational electrodynamics to describe radiative transfer in many-body geometries with varying temperature distributions, including nanoparticle systems [17][18][19], multilayer configurations [16,[20][21][22][23][24][25][26][27][28], and more generally, arbitrary geometries that include the possibility of inhomogeneously varying temperature profiles [29,30]. Furthermore, heat transport within a collection of nanoparticles has been studied in Ref. [31], and the existence of a superdiffusive regime has been found, albeit within a dipolar approximation.In the present Letter, we employ a recently developed, exact theoretical framework [32] to investigate near-field radiative heat transport in N -body systems consisting of parallel planar slabs separated by vacuum, in which radiation is the only source of thermal relaxation. We show that the temperature dynamics and steady-state profile of the system depend strongly on geometric parameters such as the system density, which imply different heat-transport regimes. In particular, we prove the existence of a nonmonotonic transition between a superdiffusive regime, previously observed in Ref. [31], and a ballistic regime that appears in denser media and that also leads to dramatically faster relaxation dynamics. We also show that this transition is associated with a change in the polarization of the dominant modes in the

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Thermal hyperconductivity: Radiative energy transport in hyperbolic media

Cited by 17 publications

References 34 publications

Near-Field Heat Transfer between Multilayer Hyperbolic Metamaterials

Near-Field Heat Transfer between Multilayer Hyperbolic Metamaterials

Realizing high-quality, ultralarge momentum states and ultrafast topological transitions using semiconductor hyperbolic metamaterials

Ballistic near-field heat transport in dense many-body systems

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