Low coherence-induced resonance in double-layer structures having parity-time symmetry

Abstract

We derive simple formulae for the transmittance $T$ and reflectance $R$ of Gaussian-Schell beams incident upon any stratified dielectric structure by using second-order classical coherence theory in the space-frequency picture. The formalism is applied to a particular structure consisting of a double-layer, with balanced gain and loss, satisfying the parity-time symmetry conditions. It is shown that sources with a low degree of spatial coherence, on the order of the wavelength, can induce large resonant peaks in the transmitted and reflected amplitudes. The resonance peaks vanish as the spatial coherence increases.

References in corpus (8)

• Real Spectra in Non-Hermitian Hamiltonians Having PT Symmetry
• Invisibility and PT-symmetry
• Unconventional modes in lasers with spatially varying gain and loss
• Tunneling of Obliquely-Incident Waves through PT-Symmetric Epsilon-Near-Zero Bi-Layers
• Scattering of partially coherent radiation by non-Hermitian localized structures having Parity-Time symmetry
• Scattering theory for stationary materials with $\mathcal{P}\mathcal{T}$ symmetry
• Nonlinear Scattering and Its Transfer Matrix Formulation in One Dimension
• Non-Hermitian spectral changes in the scattering of partially coherent radiation by periodic structures

Cited by in corpus (1)

• Propagation of Partially Coherent Light in non-Hermitian Lattices