Double-sided unidirectional reflectivity

Abstract

We study the effect of unidirectional reflectivity in the bilayer optical model with the balanced loss/gain terms. It was found that if the impedances characterizing the scattering part are different from those describing the leads, a new effect of double-sided unidirectional reflectivity emerges. In this case the vanishing of reflectivity occurs either for the left or right reflectivity, depending on the frequency of scattering wave. It is shown that the alternation of the unidirectional reflectivity from the left to the right can occur even if the corresponding Hamiltonian is non-PT-symmetric. Our analytical results are demonstrated by numerical data.

11 pages, 11 figures

References in corpus (7)

• PT-symmetry breaking and laser-absorber modes in optical scattering systems
• Unidirectional Nonlinear PT-symmetric Optical Structures
• Exponentially Fragile PT-Symmetry in Lattices with Localized Eigenmodes
• Invisibility and PT-symmetry
• Spectral singularities in PT-symmetric periodic finite-gap systems
• $PT$-symmetric invisible defects and confluent Darboux-Crum transformations
• PT-symmetric transport in non-PT-symmetric bi-layer optical arrays

Cited by in corpus (2)

• PT-symmetry breaking in multilayers with resonant loss and gain locks light propagation direction
• $\mathcal{P}\mathcal{T}$-symmetric tight-binding model with asymmetric couplings