Accessible phases via wave impedance engineering with PT-symmetric metamaterials

Abstract

Optical systems that respect Parity-Time (PT) symmetry can be realized with proper incorporation of gain/loss materials. However, due to the absence of magnetic response at optical frequencies, the wave impedance is defined entirely by their permittivity and, hence, the PT-symmetric character is controlled solely via their refractive index. Here, we show that the separate control of the wave impedance enabled by metamaterials can grant access to further tuning of the Exceptional Points, appearance of mixed phases (coexistence of PT-symmetric and PT-broken phases) and occurrence of phase re-entries, not easily realizable with natural materials.

arXiv comment8 pages, 7 figures

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Cited by in corpus (4)

• PT-symmetric chiral metamaterials: Asymmetric effects and PT-phase control
• Chirality sensing employing PT-symmetric and other resonant gain-loss optical systems
• Scattering of Spin-$\frac{1}{2}$ Particles from a $\mathcal{P}\mathcal{T}$-symmetric Complex Potential
• Oblique scattering from non-Hermitian optical waveguides