PT-symmetric chiral metamaterials: Asymmetric effects and PT-phase control
arXiv:2003.07882 · doi:10.1103/PhysRevB.101.214109
Abstract
We investigate the influence of chirality on the PT-symmetric and PT-broken phase of PT-symmetric chiral systems. Starting from the point that transverse magnetic (TM) and transverse electric (TE) waves have different exceptional points, we show that with circularly polarized waves (which are linear combinations of TM and TE waves) mixed PT-symmetric phases can be realized and the extent of these phases can be highly controlled by either or both the chirality and the angle of incidence. Additionally, while the transmission of both TM and TE waves in non-chiral PT-symmetric systems is the same for forward and backward propagation, we show that with chirality this symmetry can be broken. As a result, it is possible to realize asymmetric, i.e. side-dependent, rotation and ellipticity in the polarization state of the transmitted wave. Our results constitute a simple example of a chiral PT-symmetric optical system in which the various phases (full PT, mixed, broken) and the asymmetric effects can be easily tuned by adjusting the chirality parameter and/or the angle of incidence.
arXiv comment13 pages
References in corpus (20)
- Real Spectra in Non-Hermitian Hamiltonians Having PT Symmetry
- Making Sense of Non-Hermitian Hamiltonians
- Unidirectional Invisibility induced by PT-Symmetric Periodic Structures
- Complex Extension of Quantum Mechanics
- PT-Symmetric Quantum Mechanics
- PT-symmetry breaking and laser-absorber modes in optical scattering systems
- 3D-Chiral Metamaterial Showing Artificial Magnetic Response and Negative Refraction
- What is Nonreciprocity?
- Negative refractive index due to chirality
- Conservation relations and anisotropic transmission resonances in one-dimensional PT-symmetric photonic heterostructures
- Sensing with exceptional surfaces: combining sensitivity with robustness
- PT Metamaterials via Complex-Coordinate Transformation Optics
- Gain-Driven Discrete Breathers in PT-Symmetric Nonlinear Metamaterials
- Tunneling of Obliquely-Incident Waves through PT-Symmetric Epsilon-Near-Zero Bi-Layers
- -Symmetry-Induced Wave Confinement and Guiding in Epsilon-Near-Zero Metamaterials
- Chiral metamaterials with PT symmetry and beyond
- Scattering properties of PT-symmetric layered periodic structures
- Scattering properties of PT-symmetric objects
- Non-reciprocal mu-near-zero mode in PT-symmetric magnetic domains
- Accessible phases via wave impedance engineering with PT-symmetric metamaterials