Thermal Rectification through Vacuum

Otey, Clayton R.; Lau, Wah Tung; Fan, Shanhui

doi:10.1103/physrevlett.104.154301

Cited by 450 publications

(312 citation statements)

References 17 publications

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“…An alternative hypothesis was suggested by Otey et al [41] who pointed to surface polaritons as a likely candidate. Although they computed a maximum rectification effect of R = 0.4, the never defined what R is so we have not included these data in Table 2.…”

Section: Non-uniform Mass-loadingmentioning

confidence: 99%

A review of thermal rectification observations and models in solid materials

Roberts

Walker

2011

International Journal of Thermal Sciences

319

283

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Thermal rectification is a phenomenon in which thermal transport along a specific axis is dependent upon the sign of the temperature gradient or heat current. This phenomenon offers improved thermal management of electronics as size scales continue to decrease and new technologies emerge by having directions of preferred thermal transport. For most applications where thermally rectifying materials could be of use they would need to exhibit one direction with high thermal conductivity to allow for efficient transport of heat from heat generating components to a sink and one direction with low conductivity to insulate the temperature and heat flux sensitive components. In the process of understanding and developing these materials multiple mechanisms have been found which produce thermally rectifying behavior and much work has been and is being done to improve our understanding of the mechanisms and how these mechanisms can be used with our improved ability to fabricate at the nanoscale to produce efficient materials which have high levels of thermal rectification.

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Section: Non-uniform Mass-loadingmentioning

confidence: 99%

A review of thermal rectification observations and models in solid materials

Roberts

Walker

2011

International Journal of Thermal Sciences

319

283

View full text Add to dashboard Cite

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“…Moreover, we find that T NL eff in this reverse scenario always decreases with increasing TPA. Such non-reciprocity in the heat exchange is absent in linear systems and could potentially be useful in technological applications, such as for thermal rectification 46,47 .…”

Section: Thermal Radiationmentioning

confidence: 99%

Radiative heat transfer in nonlinear Kerr media

et al. 2015

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We obtain a fluctuation-dissipation theorem describing thermal electromagnetic fluctuation effects in nonlinear media that we exploit in conjunction with a stochastic Langevin framework to study thermal radiation from Kerr (χ (3) ) photonic cavities coupled to external environments at and out of equilibrium. We show that that in addition to thermal broadening due to two-photon absorption, the emissivity of such cavities can exhibit asymmetric, non-Lorentzian lineshapes due to self-phase modulation. When the local temperature of the cavity is larger than that of the external bath, we find that the heat transfer into the bath exceeds the radiation from a corresponding linear black body at the same local temperature. We predict that these temperature-tunable thermal processes can be observed in realistic, nanophotonic cavities operating near room temperature.

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“…This fact has inspired researchers to generate similar techniques for controlling the near-field thermal transfer similar to the ones that have been developed for controlling thermal emission [5][6][7][8] . Such efforts have lead to the design of nanostructures for a variety of applications such as thermal rectifiers 9 , thermal diodes 10 , and near-field thermal transistors 11 .…”

Section: Introductionmentioning

confidence: 99%

“…In addition to a variety of exact numerical techniques, there also exists a set of approximation methods for thermal transfer calculations. Among them, the most popular are the effective medium theory that is used for subwavelength periodic structures [19][20][21][22][23][24] , the proximity approximation and its modified version [25][26][27] , and the coupled mode theory 9,28,29 .…”

Section: Introductionmentioning

confidence: 99%

Effect of shape in near-field thermal transfer for periodic structures

2015

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In this paper, the effect of the geometrical shape on the radiative thermal transfer between a periodic array of beams and a planar substrate is investigated. Specifically, we analyze the changes in the thermal transfer that occur when the cross sectional shape of SiC beams is modified from rectangular to ellipsoidal and finally triangular. Numerical calculations are done based on the rigorous coupled wave analysis. These exact results from this analysis are compared to modified proximity and far-field approximations, which become valid for small and large spacings, respectively. Moreover, these results are also compared to effective medium theory, which becomes increasingly accurate in the limit of small periodicities. We show that a reduction in the periodicity will lead to a reduced thermal transfer for triangular and ellipsoidal shaped beams. Even though, in the limit of very small periodicity, thermal transfer for the case of rectangular shaped beams also decreases by decreasing the periodicity but this decrease is more slowly as compared to other cross sectional shapes. Finally, we show that even though changing periodicity will change the magnitude of thermal transfer, the scaling law for its variation with the beam to substrate spacing is primarily determined by the cross sectional shape rather than the periodicity. We analytically prove this fact by investigating the large and small periodicity regimes. INTRODUCTION:

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Thermal Rectification through Vacuum

Cited by 450 publications

References 17 publications

A review of thermal rectification observations and models in solid materials

A review of thermal rectification observations and models in solid materials

Radiative heat transfer in nonlinear Kerr media

Effect of shape in near-field thermal transfer for periodic structures

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