Solution of near-field thermal radiation in one-dimensional layered media using dyadic Green's functions and the scattering matrix method

Francoeur, Mathieu; Mengüç, M. Pınar; Vaillon, Rodolphe

doi:10.1016/j.jqsrt.2009.05.010

Cited by 185 publications

(135 citation statements)

References 35 publications

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“…When both sides support surface phonon polaritons at similar frequencies, coupling between surface phonon polaritons is enhanced, thus increasing the values of the transmission function f(ω;k) in Eq. 2 [11,33]. Without external electric field, the first TO frequency on material 2 is higher than that at material 1 since T 2 > T 1 .…”

Section: Phonon Polaritonsmentioning

confidence: 93%

“…1(a) of two parallel semi--infinite ferroelectric materials separated by a distance d, kept at temperatures T 1 and T 2 , and with applied electric fields E 1 and E 2 respectively. The radiative heat exchange for this geometry can be calculated via fluctuating electrodynamics method established by [6][7][8][9][10][11]. The approach is based 3 on the solution of Maxwell equations via the fluctuation--dissipation theorem with the thermally excited electron fluctuations inside the materials as the sources of electromagnetic radiation.…”

mentioning

confidence: 99%

“…is the average energy of a photon with angular frequency ω emitted from a source at equilibrium temperature T, and f(ω;d) is the spectral transmission function [11]. The average photon energy depends only on the surface temperature, but the transmission function f(ω;d) depends strongly on the surface optical properties [6 -11].…”

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confidence: 99%

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Electrically tunable near-field radiative heat transfer via ferroelectric materials

Huang

Boriskina

Chen

2014

Applied Physics Letters

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We explore ways to actively control near--field radiative heat transfer between two surfaces that relies on electrical tuning of phonon modes of ferroelectric materials. Ferroelectrics are widely used for tunable electrical devices such as capacitors and memory devices; however, their tunable propertieshave not yet been examined for heat transfer applications. We show via simulations that radiative heat transfer between two ferroelectric materials can be enhanced by over two orders of magnitude over the blackbody limit in the near field, and can be tuned as much as 16.5% by modulating the coupling between surface phonon polariton modes at the two surfaces via varying external electric fields. We then discuss how to maximize the modulation contrast for tunable thermal devices using the studied mechanism.Keywords: Ferroelectrics, Near--field Radiation, Tunable Heat Transfer, Energy Transport, Surface Phonon PolaritonsIt has already been demonstrated both experimentally and theoretically that thermal emission and radiative heat exchange between hot and cold surfaces is modified dramatically when the surfaces are brought into a close proximity [1 -11]. At separation distances smaller than the dominant wavelength of thermal radiation, the radiative heat flux has been demonstrated to be orders of magnitude higher than the blackbody limit predicted by the Planck and the Stefan--Boltzmann laws [3 --9]. One major reason for such enhancement is that photons can couple resonantly with optical phonons in polar materials at the material surface to form surface phonon polariton (SPP) waves [3 -11], which † To whom correspondence should be addressed gchen2@mit.edu 2 exponentially decay from the surface but can tunnel through the vacuum gap between hot and cold surfaces when the gap size is small [3 --11]. Several calculations and experiments have shown that near--field radiative heat flux can be controlled by modifying the geometries of thermal emitters and absorbers [13 --19] as well as by using materials with externally variable optical properties, such as vanadium dioxide that undergoes a metal--insulator transition [20,22,23], semiconductors with different levels of doping [25,26], modulation of graphene optical properties via electrostatic gating [27,28], dynamic magnetoelectric coupling in metamaterials [29], and modulation of intersubband transition rates in a quantum cascade laser [30]. In this paper, we investigate an approach to actively control radiative heat flux via applying external electric field that causes the softening (i.e. decrease in frequency) and hardening (i.e. increase in frequency) of transverse optical (TO) phonon mode in ferroelectric materials [32, 34 --38].Tunability of the TO phonon mode in perovskite--structure ferroelectric materials stems from the material structure instability [31, 32, 34 --38]. One unique property of ferroelectrics is that its static dielectric constant can be modulated by external dc electric field and temperature by inducing crystal structure changes within the ma...

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Section: Phonon Polaritonsmentioning

confidence: 93%

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confidence: 99%

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Electrically tunable near-field radiative heat transfer via ferroelectric materials

Huang

Boriskina

Chen

2014

Applied Physics Letters

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“…The transmission coefficient τ p;s ðω; qÞ for p and s polarization can be extracted from Pðω; qÞ. There are several methods to determine Pðω; qÞ exactly for multilayer systems [33][34][35][36]. Here, we use the equivalent-circuit model of Ref.…”

Section: Numerical Studymentioning

confidence: 99%

Super-Planckian Thermophotovoltaics Without Vacuum Gaps

2017

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We introduce the concept of a thermophotovoltaic system whose emitter is separated from the photovoltaic cell by an intermediate thick slab of gallium arsenide. Owing to the engineered structure of the emitter (a multilayer structure of negative-and positive-ϵ layers) together with a high refractiveindex and transparency of the intermediate slab, we achieve a super-Planckian and frequency-selective spectrum of radiative heat transfer which is desirable for the efficient performance of thermophotovoltaic systems.

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“…More detailed discussion on these aspects can be found in [26], [34][35][36][37]. The modes that lie within the spectral band ω T0 -ω L0 (negative permittivity of SiC) and to the right of the vacuum light line, are the SPhPs and can only propagate along the SiC-vacuum interfaces (they are evanescent both in vacuum and SiC).…”

Section: Analytical Solutionmentioning

confidence: 99%

FDTD Simulation of Near-Field Radiative Heat Transfer between Thin Films Supporting Surface Phonon Polaritons: Lessons Learned

Datas

Hirashima

Hanamura

2013

JTST

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We present the numerical simulation, using the finite difference time domain (FDTD) method, of the radiative heat transfer between two thin SiC slabs. We aim to explore the ability of the FDTD method to reproduce the analytical results for the Surface Phonon Polariton (SPhP) assisted near field radiative energy transfer between two SiC slabs separated by a nano/micro-metric vacuum gap. In this regard, we describe the key challenges that must be addressed for simulating general near-field radiative energy transfer problems using the FDTD method. FDTD is a powerful technique for simulating the near-field radiative energy transfer because it allows simulating arbitrary shaped nano-structured bodies, like photonic crystals, for which an analytical solution is not readily obtained.

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Solution of near-field thermal radiation in one-dimensional layered media using dyadic Green's functions and the scattering matrix method

Cited by 185 publications

References 35 publications

Electrically tunable near-field radiative heat transfer via ferroelectric materials

Electrically tunable near-field radiative heat transfer via ferroelectric materials

Super-Planckian Thermophotovoltaics Without Vacuum Gaps

FDTD Simulation of Near-Field Radiative Heat Transfer between Thin Films Supporting Surface Phonon Polaritons: Lessons Learned

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