Optical isolation of circularly polarized light with a spontaneous magnetoelectric effect

Prudêncio, Filipa R.; Silveirinha, Mário G.

doi:10.1103/physreva.93.043846

Cited by 37 publications

(25 citation statements)

References 48 publications

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“…Nonreciprocal effects may also occur in systems with moving parts [17,22,23], when the material response is time-modulated [24], or in presence of strong nonlinearities [25]. Furthermore, in some antiferromagnetic materials the time-reversal symmetry may be spontaneously broken due to magnetic ordering [18,26].…”

Section: Introductionmentioning

confidence: 99%

Topological angular momentum and radiative heat transport in closed orbits

Silveirinha

2017

Phys. Rev. B

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Here, we study the role of topological edge states of light in the transport of thermally generated radiation in a closed cavity at a thermodynamic equilibrium. It is shown that even in the zero temperature limit -when the field fluctuations are purely quantum mechanical -there is a persistent flow of electromagnetic momentum in the cavity in closed orbits, deeply rooted in the emergence of spatially separated unidirectional edge state channels. It is highlighted the electromagnetic orbital angular momentum of the system is nontrivial, and that the energy circulation is towards the same direction as that determined by incomplete cyclotron orbits near the cavity walls. Our findings open new inroads in topological photonics and suggest that topological states of light can determine novel paradigms in the context of radiative heat transport.

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Section: Introductionmentioning

confidence: 99%

Topological angular momentum and radiative heat transport in closed orbits

Silveirinha

2017

Phys. Rev. B

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“…response [32][33][34][35]. Materials with a Tellegen response are nonreciprocal and enable peculiar effects and exotic physics [36][37][38][39]. It is interesting to point out that the Tellegen coupling is real-valued.…”

Section: B Photonic Analogue Of the Haldane Modelmentioning

confidence: 99%

First principles calculation of topological invariants of non-Hermitian photonic crystals

Prudêncio

Silveirinha

2020

Commun Phys

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Topological photonic systems have recently emerged as an exciting new paradigm to guide light without back-reflections. The Chern topological numbers of a photonic platform are usually written in terms of the Berry curvature, which depends on the normal modes of the system. Here, we use a gauge invariant Green’s function method to determine from first principles the topological invariants of photonic crystals. The proposed formalism does not require the calculation of the photonic band-structure, and can be easily implemented using the operators obtained with a standard plane-wave expansion. Furthermore, it is shown that the theory can be readily applied to the classification of topological phases of non-Hermitian photonic crystals with lossy or gainy materials, e.g., parity-time symmetric photonic crystals.

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“…It fully transmits RCP light incident opposite to the direction of H 0 but blocks it in the opposite direction. Likewise, it fully transmits LCP light incident along H 0 and blocks it in the opposite direction [164]. Being lossless, the system does not violate the unitarity condition of the scattering matrix because it includes four ports: With right and left circular polarizations on both sides of the slab.…”

Section: B Applications Of Nonreciprocal Effects and Examples Of Lti ...mentioning

confidence: 99%

Tutorial on Electromagnetic Nonreciprocity and Its Origins

Asadchy,

Mirmoosa,

Díaz-Rubio

et al. 2020

Preprint

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This tutorial provides an intuitive and concrete description of the phenomena of electromagnetic nonreciprocity that will be useful for readers with engineering or physics backgrounds. The notion of time reversal and its different definitions are discussed with special emphasis to its relation with the reciprocity concept. Starting from the Onsager reciprocal relations generally applicable to all processes, we derive the Lorentz theorem and discuss other implications of reciprocity for electromagnetic systems. Next, we identify all possible routes towards engineering nonreciprocal devices and analyze in detail three of them: Based on external bias, based on nonlinear and time-variant systems. The principles of the operation of different nonreciprocal devices are explained. Furthermore, we present general classification of reciprocal and nonreciprocal phenomena in linear bianisotropic media using the space-and time-reversal symmetries. This classification serves as a powerful tool for drawing analogies between seemingly distinct effects having the same physical origin, and can be used for predicting novel electromagnetic phenomena. Finally, we address the similarity and fundamental difference between nonreciprocal effects and asymmetric transmission in reciprocal systems.

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Optical isolation of circularly polarized light with a spontaneous magnetoelectric effect

Cited by 37 publications

References 48 publications

Topological angular momentum and radiative heat transport in closed orbits

Topological angular momentum and radiative heat transport in closed orbits

First principles calculation of topological invariants of non-Hermitian photonic crystals

Tutorial on Electromagnetic Nonreciprocity and Its Origins

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