Nanoscale radiation heat transfer for silicon at different doping levels

Fu, Ceji; Zhang, Z.M.

doi:10.1016/j.ijheatmasstransfer.2005.09.037

Cited by 274 publications

(208 citation statements)

References 42 publications

Supporting

Mentioning

205

Contrasting

Unclassified

Order By: Relevance

“…In contrast in near field (NF) surface excitations such as phonon polaritons and low frequency plasmons result in an improved spatial coherence [16] and narrow bandwidths [8], leading to an increase in energy density beyond the Planck blackbody limit [1][2][3]. For materials such as SiC and SiO 2 the surface excitations are attributed to ion-vibrations [4,5], whereas for doped silicon [11] and graphene [10,21] they are due to electronic vibrations (plasmons). For these materials, the plasmon frequency can be tuned by changing the amount of free carriers.…”

Section: *Corresponding Authors; Petervanzwol@gmailcom Joelchevriementioning

confidence: 99%

See 1 more Smart Citation

Nanoscale Radiative Heat Flow due to Surface Plasmons in Graphene and Doped Silicon

Zwol¹,

Thiele²,

Berger³

et al. 2012

Phys. Rev. Lett.

View full text Add to dashboard Cite

Section: *Corresponding Authors; Petervanzwol@gmailcom Joelchevriementioning

confidence: 99%

“…The efficiency of NF RHT for silicon and graphene to other materials strongly depends on the plasmon frequency [10,11,21], which in turn depends on the amount of free carriers. For the samples used here the carrier density n h and mobilities μ were determined by Hall measurements ( fig.…”

Section: *Corresponding Authors; Petervanzwol@gmailcom Joelchevriementioning

confidence: 99%

Nanoscale Radiative Heat Flow due to Surface Plasmons in Graphene and Doped Silicon

Zwol¹,

Thiele²,

Berger³

et al. 2012

Phys. Rev. Lett.

View full text Add to dashboard Cite

“…But, what will be the force and heat transfer between bodies separated by nanometer distances? Several groups [5,[9][10][11] have shown that when the gap distance, d between bodies becomes very small, the near-field heat transfer varies as d −2 . By using nonlocal dielectric function it has been shown that, the d −2 dependence would disappear for d < 0.1 nanometer (nm) [12], [13] but generally speaking, the nonlocal effects has little influence on the predicted heat flux for d > 0.1 nm [12].…”

Section: Introductionmentioning

confidence: 99%

Graphene-based three-body amplification of photon heat tunneling

Simchi

2017

Journal of Applied Physics

View full text Add to dashboard Cite

We consider a three slabs configuration including two non-doped single layer graphene on insulating silicon dioxide (G/SiO2) substrates and one non-doped suspended single layer graphene (SG). The suspended layer is placed between two G/SiO2 layers. Without SG layer, the heat flux has maximum at Plasmon frequency supported by the G/SiO2 slabs. In three slabs configuration, the photon heat tunneling is amplified between two G/SiO2 layers significantly, only for specific range of vacuum gap between SG layer and G/SiO2 layers and Plasmon frequency, due to the coupling of modes between each G/SiO2 layer and SG layer. Since, the SG layer is a single atomic layer, the photon heat tunneling assisted by this configuration does not depend on the thickness of middle layer and in consequence, it can enable novel applications for nanoscale thermal management.

show abstract

“…The common paradigm is that the largest heat flux can be achieved when the materials support surface polaritons which will give a resonant energy transfer restricted to a small frequency band around the surface mode resonance frequency [3,4,12,13]. Many researchers have tried to find materials enhancing the nanoscale heat flux due to the contribution of the coupled surface modes by using layered materials [14,15], doped silicon [16,17], metamaterials [18][19][20], phase-change materials [21] and recently graphene [22].…”

mentioning

confidence: 99%

Hyperbolic Metamaterials as an Analog of a Blackbody in the Near Field

2012

View full text Add to dashboard Cite

We study the near-field heat exchange between hyperbolic materials and demonstrate that these media are able to support broadband frustrated modes which transport heat by photon tunnelling with a high efficiency close to the theoretical limit. We predict that hyperbolic materials can be designed to be perfect thermal emitters at nanoscale and derive the near-field analog of the blackbody limit.PACS numbers: 44.40.+a;81.05.Xj A black body is usually defined by its property of having a maximum absorptivity and therefore also a maximum emissivity by virtue of Kirchhoff's law [1]. The energy transmission between two black bodies having different temperatures obey the well-known Stefan-Boltzmann law. This law sets an upper limit for the power which can be transmitted by real materials, but it is itself a limit for the far-field only, since it takes only propagating modes into account. In terms of the energy transmission between two bodies the black body case corresponds to maximum transmission for all allowed frequencies ω and all wave vectors smaller than ω/c, where c is the vacuum light velocity. This means that all the propagating modes are perfectly transmitted across the separation gap.In the near-field regime, i.e., for distances smaller than the thermal wavelength λ th = c/k B T (2π is Planck's constant, k B is Boltzmann's constant, and T is the temperature) the radiative heat flux is not due to the propagating modes, but it is dominated by evanescent waves [2-4] and especially surface polaritons as confirmed by recent experiments [5][6][7][8][9][10][11]. The common paradigm is that the largest heat flux can be achieved when the materials support surface polaritons which will give a resonant energy transfer restricted to a small frequency band around the surface mode resonance frequency [3,4,12,13]. Many researchers have tried to find materials enhancing the nanoscale heat flux due to the contribution of the coupled surface modes by using layered materials [14,15] In the present work the aim is twofold: (i) We show, that materials supporting a broad band of evanescent frustrated modes can outperform the heat flux due to surface modes. This provides new possibilies for designing materials giving large nanoscale heat fluxes which could be used for thermal management at the nanoscale for instance. (ii) We derive a general limit for the heat flux carried by the frustrated modes and show that it is, in fact, the near-field analog of the usual black body limit. For the evanescent modes a near field analog of a black body can be defined in the sense that the energy transmission coefficient must be equal to one for all frequencies and all wave vectors larger than ω/c. With today's nanofabrication techniques it is possible to manufacture artificial materials such as photonic band gap materials and metamaterials which exhibit very unusual material properties like negative refraction [23]. Due to such properties they are considered as good candidates for perfect lensing [24,25], for repulsive Casimir forces [26][27][28][...

show abstract

Nanoscale radiation heat transfer for silicon at different doping levels

Cited by 274 publications

References 42 publications

Nanoscale Radiative Heat Flow due to Surface Plasmons in Graphene and Doped Silicon

Nanoscale Radiative Heat Flow due to Surface Plasmons in Graphene and Doped Silicon

Graphene-based three-body amplification of photon heat tunneling

Hyperbolic Metamaterials as an Analog of a Blackbody in the Near Field

Contact Info

Product

Resources

About