Enhanced Near-Field Thermal Radiation Based on Multilayer Graphene-hBN Heterostructures

Shi, Kezhang; Bao, Fanglin; He, Sailing

doi:10.1021/acsphotonics.7b00037

Cited by 137 publications

(79 citation statements)

References 33 publications

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“…The strong dependence of the near-field heat transfer on the chemical potential offers another way to actively tune near-field heat transfer besides changing N [41,42]. Note that after the submission of this paper, a paper studying similar system appeared [43].…”

Section: Effect Of Chemical Potential and Number Of Layersmentioning

confidence: 94%

Near-field heat transfer between graphene/hBN multilayers

et al. 2017

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We study the radiative heat transfer between multilayer structures made by a periodic repetition of a graphene sheet and a hexagonal boron nitride (hBN) slab. Surface plasmons in a monolayer graphene can couple with a hyperbolic phonon polaritons in a single hBN film to form hybrid polaritons that can assist photon tunneling. For periodic multilayer graphene/hBN structures, the stacked metallic/dielectric array can give rise to a further effective hyperbolic behavior, in addition to the intrinsic natural hyperbolic behavior of hBN. The effective hyperbolicity can enable more hyperbolic polaritons that enhance the photon tunneling and hence the near-field heat transfer. However, the hybrid polaritons on the surface, i.e. surface plasmon-phonon polaritons, dominate the near-field heat transfer between multilayer structures when the topmost layer is graphene. The effective hyperbolic regions can be well predicted by the effective medium theory (EMT), thought EMT fails to capture the hybrid surface polaritons and results in a heat transfer rate much lower compared to the exact calculation. The chemical potential of the graphene sheets can be tuned through electrical gating and results in an additional modulation of the heat transfer. We found that the near-field heat transfer between multilayer structure does not increase monotonously with the number of layer in the stack, which provides a way to control the heat transfer rate by the number of graphene layers in the multilayer structure. The results may benefit the applications of near-field energy harvesting and radiative cooling based on hybrid polaritons in two-dimensional materials.

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Section: Effect Of Chemical Potential and Number Of Layersmentioning

confidence: 94%

Near-field heat transfer between graphene/hBN multilayers

et al. 2017

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“…These strategies have largely explored the influence of the hybridization effect of polaritons on near-field thermal radiation [20][21][22][23][24][25][26][27]. Nonetheless, up to now, the influence of the hybridization of anisotropic polaritons on the near-field radiation remains elusive.…”

Section: Introductionmentioning

confidence: 99%

Polariton topological transition effects on radiative heat transfer

Zhou

Zhang

et al. 2021

Phys. Rev. B

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Twisted two-dimensional bilayer anisotropy materials exhibit many exotic physical phenomena. Manipulating the "twist angle" between the two layers enables the hybridization phenomenon of polaritons, resulting in fine control of the dispersion engineering of the polaritons in these structures. Here, combined with the hybridization phenomenon of anisotropy polaritons, we study theoretically the near-field radiative heat transfer (NFRHT) between two twisted hyperbolic systems. These two twisted hyperbolic systems are mirror images of each other. Each twisted hyperbolic system is composed of two graphene gratings, where there is an angle ϕ between these two graphene gratings. By analyzing the photonic transmission coefficient as well as the plasmon dispersion relation of the twisted hyperbolic system, we prove the enhancement effect of the topological transitions of the surface state at a special angle [from open (hyperbolic) to closed (elliptical) contours] on radiative heat transfer. Meanwhile the role of the thickness of dielectric spacer and vacuum gap on the manipulating the topological transitions of the surface state and the NFRHT are also discussed. We predict the hysteresis effect of topological transitions at a larger vacuum gap, and demonstrate that as the thickness of the dielectric spacer increases, the transition from the enhancement effect of heat transfer caused by the twisted hyperbolic system to a suppression.

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“…For example, hyperbolic phonon polaritons (HPPs) supported by hyperbolic materials can couple with the SPPs of graphene to * changying.zhao@sjtu.edu.cn form new hybrid modes, resulting in nearly perfect photon tunneling [33][34][35][36][37]. Researchers have recently studied graphene/hexagonal boron nitride (hBN) multilayer heterostructures for NFHT and demonstrated an infinite limit [38,39]. Because the coupled SPP-HPP hybrid modes in graphene/hBN heterostructures suffer little from Ohmic losses, their propagation length is 1.5 to 2.0 times greater than that of HPPs in hBN [40].…”

Section: Introductionmentioning

confidence: 99%

Enhancing near-field heat transfer between composite structures through strongly coupled surface modes

2019

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In this work, we study the near-field heat transfer between composite nanostructures. It is demonstrated that thermally excited surface plasmon polaritons, surface phonon polaritons, and hyperbolic phonon polaritons in such composite nanostructures significantly enhance the near-field heat transfer. To further analyze the underlying mechanisms, we calculate energy transmission coefficients and obtain the near-field dispersion relations. The dispersion relations of composite nanostructures are substantially different from those of isolated graphene, silicon carbide (SiC) films, and SiC nanowire arrays due to the strong coupling effects among surface polaritonic modes. We identify four pairs of strongly coupled polaritonic modes with considerable Rabi frequencies in graphene/SiC film composite structures that greatly broaden the spectral peak. We confirm that near-field strong coupling effects between surface plasmon polaritons and hyperbolic phonon polaritons in the in-plane Reststrahlen band are different from those in the out-of-plane Reststrahlen band due to the different types of hyperbolicity. In addition, we analyze the effective tunability of the near-field heat transfer of graphene/SiC nanowire arrays composite structures by adjusting the chemical potential of graphene, the height and volume filling factor of the SiC nanowire arrays. This work provides a method to manipulate the near-field heat transfer with the use of strongly coupled surface polaritonic modes.

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Enhanced Near-Field Thermal Radiation Based on Multilayer Graphene-hBN Heterostructures

Cited by 137 publications

References 33 publications

Near-field heat transfer between graphene/hBN multilayers

Near-field heat transfer between graphene/hBN multilayers

Polariton topological transition effects on radiative heat transfer

Enhancing near-field heat transfer between composite structures through strongly coupled surface modes

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