English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Combining loss and gain components in one photonic heterostructure opens anew route to efficient manipulation by radiation, transmission, absorption, andscattering of electromagnetic waves. Therefore, loss/gain structures enabling${\cal PT}$-symmetric and ${\cal PT}$-broken phases for eigenvalues haveextensively been studied in the last decade. In particular, translation fromone phase to another, which occurs at the critical point in the two-channelstructures with one-dimensional loss/gain components, is often associated withone-way transmission. In this report, broadband mixing of the ${\calPT}$-symmetric and ${\cal PT}$-broken phases for eigenvalues is theoreticallydemonstrated in heterostructures with four channels obtained by combining aone-dimensional loss/gain bilayer and one or two thin polarization-convertingcomponents (PCCs). The broadband phase mixing in the four-channel case isexpected to yield advanced transmission and absorption regimes. Variousconfigurations are analyzed, which are distinguished in symmetry properties andpolarization conversion regime of PCCs. The conditions necessary for phasemixing are discussed. The simplest two-component configurations with broadbandmixing are found, as well as the more complex three-component configurationswherein symmetric and broken sets are not yet mixed and appear in theneighbouring frequency ranges. Peculiarities of eigenvalue behaviour areconsidered for different permittivity ranges of loss/gain medium, i.e., fromepsilon-near-zero to high-epsilon regime.

Broadband mixing of ${\cal PT}$-symmetric and ${\cal PT}$-broken phases in photonic heterostructures with a one-dimensional loss/gain bilayer