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

摘要

The nonlinear polariton transmission, reflection and trapping by a defect inthe resonantly absorbing Bragg grating (RABG) is demonstrated in numericalsimulation. It is shown that the wide defect under some conditions couldeffectively serve as microresonator for polaritonic wave storage. The threetypes of the defect such as microcavity, groove and stripe are considered.Capture the electromagnetic field inside the microcavity (with no resonantnanoparticles) placed in the RABG is observed, as well as stuck of trappedpolarization modes to the defect edges for the groove (defect span with reduceddensity of nanoparticles) and for the stripe with relatively increased density.Strong radiation reflection and adhered propagation of the polarization modealong the first edge of the stripe with high density of resonant atoms isexhibited by numerical computation.