Oblique scattering from non-Hermitian optical waveguides

Abstract

A judicious design of gain and loss leads to counterintuitive wave phenomena that are inaccessible by conservative systems. Notably, such designs can give rise to laser-absorber modes and anisotropic transmission resonances. Here, we analyze the emergence of these phenomena in an optical scatterer with sinusoid gain-loss modulation that is subjected to monochromatic oblique waves. We derive an analytical solution to the problem, with which we show how the scatterer parameters, and specifically the modulation phase and incident angle, constitute a real design space to access these phenomena.

23 pages, 10 figures

References in corpus (8)

• Non-Hermitian Physics
• The physics of exceptional points
• Coherent Perfect Absorbers: Time-reversed Lasers
• PT-symmetry breaking and laser-absorber modes in optical scattering systems
• Light stops at exceptional points
• Invisibility and PT-symmetry
• Enhanced nonlinear frequency conversion and Purcell enhancement at exceptional points
• PT-symmetric chiral metamaterials: Asymmetric effects and PT-phase control