Non-reciprocal mu-near-zero mode in PT-symmetric magnetic domains

Abstract

We find that a new type of non-reciprocal modes exist at an interface between two \emph{parity-time} ($\mathcal{P}\mathcal{T}$) symmetric magnetic domains (MDs) near the frequency of zero effective permeability. The new mode is non-propagating and purely magnetic when the two MDs are semi-infinite while it becomes propagating in the finite case. In particular, two pronounced nonreciprocal responses could be observed via the excitation of this mode: one-way optical tunneling for oblique incidence and unidirectional beam shift at normal incidence. When the two MDs system becomes finite in size, it is found that perfect-transmission mode could be achieved if $\mathcal{P}\mathcal{T}$-symmetry is maintained. The unique properties of such an unusual mode are investigated by analytical modal calculation as well as numerical simulations. The results suggest a new approach to the design of compact optical isolator.

8 pages, 6 figures

References in corpus (5)

• Nonreciprocal light transmission in parity-time-symmetric whispering-gallery microcavities
• Analogs of quantum Hall effect edge states in photonic crystals
• Unidirectional Nonlinear PT-symmetric Optical Structures
• Tunneling of Obliquely-Incident Waves through PT-Symmetric Epsilon-Near-Zero Bi-Layers
• Reconfigurable nonreciprocity with nonlinear Fano diode

Cited by in corpus (7)

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• PT-symmetric chiral metamaterials: Asymmetric effects and PT-phase control
• Acoustic metamaterials with spinning components
• Accessible phases via wave impedance engineering with PT-symmetric metamaterials
• Exact Intrinsic Localized Excitation of an Anisotropic Ferromagnetic Spin Chain in External Magnetic Field with Gilbert Damping, Spin Current and PT-Symmetry
• Diamond Configuration for Non-reciprocal Transmission
• Nonreciprocal Local-Resonance Induced Complex Band Hybridization