Chiral metamaterials with PT symmetry and beyond
arXiv:1811.05344 · doi:10.1103/PhysRevLett.122.213201
Abstract
Optical systems with gain and loss that respect Parity-Time (PT) symmetry can have real eigenvalues despite their non-Hermitian character. Chiral systems impose circularly polarized waves which do not preserve their handedness under the combined space- and time- reversal operations and, as a result, seem to be incompatible with systems possessing PT symmetry. Nevertheless, in this work we show that in certain configurations, PT symmetric permittivity, permeability and chirality is possible; in addition, real eigenvalues are maintained even if the chirality goes well beyond PT symmetry. By obtaining all three constitutive parameters in realistic chiral metamaterials through simulations and retrieval, we show that the chirality can be tailored independently of permittivity and permeability; thus, in such systems, a wide control of new optical properties including advanced polarization control is achieved.
arXiv comment5 pages, 4 figures
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- Symmetry-Protected Scattering in Non-Hermitian Linear Systems
- PT-symmetric chiral metamaterials: Asymmetric effects and PT-phase control
- Non-Bloch band theory of generalized eigenvalue problems
- Scattering Activities Bounded by Reciprocity and Parity Conservation
- On-demand Parity-Time symmetry in a lone oscillator through complex, synthetic gauge fields
- Chirality sensing employing PT-symmetric and other resonant gain-loss optical systems
- Accessible phases via wave impedance engineering with PT-symmetric metamaterials
- Unitary Scattering Protected by Pseudo-Hermiticity
- Analogue of collectively induced transparency in metamaterials
- Self-similar plasmonic nanolenses: mesoscopic ensemble averaging and chiral light-matter interactions
- PT-symmetry enabled stable modes in multi-core fiber
- Topological Lattice Metamaterials -- A Platform For Novel Electromagnetic Material Design Based On An Artificial Topological "Atom"
- Enantiosensitive exceptional points in open chiral systems