Magnetic field control of near-field radiative heat transfer and the realization of highly tunable hyperbolic thermal emitters
Entidad
UAM. Departamento de Física Teórica de la Materia CondensadaEditor
American Physical SocietyFecha de edición
2015-09-14Cita
10.1103/PhysRevB.92.125418
Physical Review B - Condensed Matter and Materials Physics 92.12 (2015): 125418
ISSN
1098-0121DOI
10.1103/PhysRevB.92.125418Financiado por
This work was financially supported by the Colombian agency COLCIENCIAS, the Spanish Ministry of Economy and Competitiveness (Contracts No. FIS2014-53488-P and No.MAT2014-58860-P), and theComunidad de Madrid (Contract No. S2013/MIT-2740). V.F.-H. acknowledges financial support from “la Caixa” Foundation and F.J.G.-V. from the European Research Council (ERC-2011-AdG Proposal No. 290981)Proyecto
Gobierno de España. FIS2014-53488-P; Gobierno de España. MAT2014-58860-P; Comunidad de Madrid. S2013/MIT-2740/PHAMA; info:eu-repo/grantAgreement/EC/FP7/290981Versión del editor
http://dx.doi.org/10.1103/PhysRevB.92.125418Materias
Magnetic field; Semiconductors; NFRHT; Common materials; FísicaDerechos
©2015 American Physical SocietyResumen
We present a comprehensive theoretical study of the magnetic field dependence of the near-field radiative heat transfer (NFRHT) between two parallel plates.We show that when the plates are made of doped semiconductors, the near-field thermal radiation can be severely affected by the application of a static magnetic field.We find that
irrespective of its direction, the presence of a magnetic field reduces the radiative heat conductance, and dramatic reductions up to 700% can be found with fields of about 6 T at room temperature. We show that this striking behavior is due to the fact that the magnetic field radically changes the nature of the NFRHT. The field not only affects the electromagnetic surface waves (both plasmons and phonon polaritons) that normally dominate the near-field radiation in doped semiconductors, but it also induces hyperbolic modes that progressively dominate the heat transfer as the field increases. In particular, we show that when the field is perpendicular to the plates,
the semiconductors become ideal hyperbolic near-field emitters. More importantly, by changing the magnetic field, the system can be continuously tuned from a situation where the surface waves dominate the heat transfer to a situation where hyperbolic modes completely govern the near-field thermal radiation.We show that this high
tunability can be achieved with accessible magnetic fields and very common materials like n-doped InSb or Si. Our study paves the way for an active control of NFRHT and it opens the possibility to study unique hyperbolic thermal emitters without the need to resort to complicated metamaterials
Lista de ficheros
Google Scholar:Moncada-Villa, E.
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Fernández-Hurtado, Víctor
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García Vidal, Fco. José
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García-Martín, A.
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Cuevas Rodríguez, Juan Carlos
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