Twist-induced Near-field Thermal Switch Using Nonreciprocal Surface Magnon-Polaritons

Peng, Jianhe; Tang, Gaomin; Wang, Luqin; Macêdo, Rair; Chen, Hong; Ren, Jie

doi:10.48550/arxiv.2012.14733

Cited by 1 publication

(2 citation statements)

References 54 publications

(56 reference statements)

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“…According to the Lorentz reciprocity principle, the shown effect means that the thermal emission of a 10µm-wavelength, which can be observed from the Moiré structure, will be strongly circularly polarized in the normal direction. In this way, we can consider this structure as a passive source of circularly polarized thermal emission, which might be potentially implemented in the radiative heat transfer problems [45,57,59].…”

Section: B Dielectric Crystalmentioning

confidence: 99%

“…As a result, currently, there is a number of studies available that demonstrate various effects in photonic Moiré metasurfaces.Twisted stacks have been used to demonstrate topological transitions of the guided modes [39][40][41][42][43][44][45], light localization in Moire supercells [46,47], tunable metasurfaces [48], and chirality enhancement [48][49][50]. Also, it has been shown that in the near-field radiative heat transfer between parallel planar metasurfaces [51][52][53][54][55][56], the heat flux can be controlled by twisting one of the corrugated plates relative to the other [45,[57][58][59]. Some of the studies utilize laser interference lithography (LIL) to obtain stacks of large-area lattices [48] and single-layer, gradient Moire-metasurfaces [16,60].…”

Section: Introductionmentioning

confidence: 99%

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Fourier modal method for Moiré lattices

Karmanova,

Fradkin,

Dyakov

et al. 2021

Preprint

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In recent years twisted bi-layers of 2D materials became very popular in the field due to the possibility to totally change their electronic properties by simple rotation. At the same time, in the wide field of photonic crystals, this idea still remains almost untouched, and only some particular problems were considered. One of the reasons is the computational difficulty of the accurate consideration of Moiré superlattices that appear due to the superimposition of misaligned lattices. Indeed, the unit cell of the complex lattice is typically much larger than the original crystals and requires much more computational resources for the computations. Here, we propose a careful adaptation of the Fourier modal method in the form of the scattering matrices for the description of twisted 1D gratings' stacks. Our approach allows us to consider sublattices in close vicinity to each other and account for their interaction via the near-field. In the developed numerical scheme, we utilize the fact that each sublattice is only 1D-periodic and therefore simpler than the resulting 2D superlattice, as well as the fact that even a small gap between the lattices filters out high Fourier harmonics due to their evanescent origin. This accelerates the computations from 1 up to 3 and more orders of magnitude for typical structures depending on the number of harmonics. This paves the way for rigorous study of almost any photonic crystals of the proposed geometry and demonstration of specific Moiré-associated effects.

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Section: B Dielectric Crystalmentioning

confidence: 99%