Wide defect in a Resonantly Absorbing Bragg Grating as a nonlinear microresonator for polaritons

TL;DR

This paper demonstrates through numerical simulation that a wide defect in a resonantly absorbing Bragg grating can act as a microresonator for polaritons, enabling trapping and manipulation of polaritonic waves.

Contribution

It introduces the concept of using wide defects in RABGs as microresonators for polaritons, exploring different defect types and their effects on wave trapping and propagation.

Findings

Wide defects can serve as effective polaritonic microresonators.

Different defect geometries influence trapping and reflection properties.

Numerical results show strong reflection and edge trapping of polarization modes.

Abstract

The nonlinear polariton transmission, reflection and trapping by a defect in the resonantly absorbing Bragg grating (RABG) is demonstrated in numerical simulation. It is shown that the wide defect under some conditions could effectively serve as microresonator for polaritonic wave storage. The three types of the defect such as microcavity, groove and stripe are considered. Capture the electromagnetic field inside the microcavity (with no resonant nanoparticles) placed in the RABG is observed, as well as stuck of trapped polarization modes to the defect edges for the groove (defect span with reduced density of nanoparticles) and for the stripe with relatively increased density. Strong radiation reflection and adhered propagation of the polarization mode along the first edge of the stripe with high density of resonant atoms is exhibited by numerical computation.