Non-hermitian 2D materials based on the nonlinear Hall effect

Tiago Morgado; Tatiana G. Rappoport; Sylvain Lannebère; Mário G. Silveirinha

doi:10.1117/12.2620358

24 May 2022 Non-hermitian 2D materials based on the nonlinear Hall effect

Tiago Morgado, Tatiana G. Rappoport, Sylvain Lannebère, Mário G. Silveirinha

Proceedings Volume PC12130, Metamaterials XIII; PC121300A (2022) https://doi.org/10.1117/12.2620358
Event: SPIE Photonics Europe, 2022, Strasbourg, France

Abstract

Symmetries and broken symmetries play important roles in physics. In particular, they constrain the electromagnetic response of materials and the allowed light-matter interactions. In such a context, symmetry breaking can lead to unique and peculiar physical phenomena. The Hall effects, for example, result from broken symmetries. In the usual linear Hall effects, the time-reversal symmetry is broken by a magnetic bias. Alternatively, nonlinear Hall effects can occur in systems with a broken inversion symmetry rather than broken time-reversal symmetry. Here we explore several physical platforms that can enable nonreciprocal and non-Hermitian responses based on the nonlinear Hall effect and 2D material layers biased with a static electric field. It will be shown that the electric field bias may create unique physical responses, including regimes of loss and gain controlled by the wave-polarization, asymmetric responses, and others. In this talk, we will present an overview of our on-going work on this topic.

Conference Presentation

Citation Download Citation

Tiago Morgado, Tatiana G. Rappoport, Sylvain Lannebère, and Mário G. Silveirinha "Non-hermitian 2D materials based on the nonlinear Hall effect", Proc. SPIE PC12130, Metamaterials XIII, PC121300A (24 May 2022); https://doi.org/10.1117/12.2620358

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