Near-field radiative heat transfer between one-dimensional magnetophotonic crystals

Abstract

We present a theoretical study of the effect of an external dc magnetic field in the near-field radiative heat transfer between two one-dimensional magnetophotonic crystals with unit cells comprising a magneto-optical layer made of n-doped InSb and a dielectric layer. We find that in the absence of an external field, and depending on the gap size, the radiative heat transfer between these multilayer structures can be larger or smaller than that of the case of two InSb infinite plates. On the other hand, when an external magnetic field is applied, the near-field radiative heat transfer is reduced as a consequence of the suppression of hybridized surface polariton waves that are supported for transverse magnetic polarized light. We show that such reduction is exclusively due to the appearance of magnetic-field induced hyperbolic modes and not to the polarization conversion in this magneto-optical system.

Deep learning for the modeling and inverse design of radiative heat transfer

“…Let us conclude this Section by emphasizing that the study presented here can be extended to essentially any multilayer system, which may include anisotropic materials and metamaterials, in general, or the effect of external fields [53,57]. Moreover, it could also be straightforwardly extended to deal with NFRHT between periodically patterned structures [58] (this is exemplified in the following Section in the case of far-field emission).…”

“…One of the most popular ideas is based on the use of multiple surface modes that can naturally appear in multilayer structures. In this regard, a lot of attention has been devoted to multilayer systems where dielectric and metallic layers are alternated to give rise to hyperbolic metamaterials [44][45][46][47][48][49][50][51][52][53]. The hybridization of surface modes appearing in different metal-dielectric interfaces have indeed been shown to lead to a great enhancement of the NFRHT, as compared to the case of two infinite parallel plates, see e.g.…”

Smart thermal management with near-field thermal radiation

“…This giant resistance results from a strong spectral shift of localized surface waves supported by the particles under the action of a magnetic field. Recent works have combined MO materials and dielectrics in a hyperbolic multilayer structure [58,59], because on the one hand the formation of hyperbolic bands can increase the near-field radiative heat flux in such systems [60][61][62] and on the other hand the application of a magnetic field enables a significant active modulation of the heat flux. However, it seems that the effective medium calculations in [57] predict an increasement of the near-field heat flux for extremely large magnetic fields, whereas the exact calculations in [59] predict a heat flux reduction for moderately large magnetic fields.…”

Piston-Type Optical Modulator for Dynamic Thermal Radiation Tuning Applications

“…As a result, many dynamic tuning techniques have been studied and applied in the past years. Researchers have demonstrated control over spectral properties mechanically [ 3 , 5 , 6 , 7 , 8 ], thermally [ 1 , 2 , 9 , 10 , 11 , 12 ], electrically [ 13 , 14 , 15 , 16 , 17 , 18 ], optically [ 19 , 20 , 21 , 22 ], and magnetically [ 23 , 24 , 25 , 26 , 27 , 28 , 29 ], leading to a multitude of practical devices.…”

“…Researchers have achieved optical tuning by utilizing lasers to induce a liquid crystal phase change [ 21 ] and through ultraviolet pulse modification used to modify the resonance frequencies [ 22 ]. Additionally, magnetic fields have been applied to induce dielectric function anisotropy in both the near field [ 25 , 26 ] and the far field [ 27 ], to modify the orientation of nanochains within silicon dioxide to alter transmissivity [ 28 ], and to induce the piezophotonic effect via magnetic field excitation at specific frequencies [ 29 ].…”