Rabi oscillations of bound states in the continuum

Photonic bound states in the continuum (BICs) are special localized and non-decaying states of a photonic system with a frequency embedded into the spectrum of scattered states. The simplest photonic structure displaying a single BIC is provided by two waveguides side-coupled to a common waveguide lattice, where the BIC is protected by symmetry. Herewe consider such a simple photonic structure and show that by breaking mirror symmetry and allowing for non-nearest neighbor couplings, a doublet of quasi-BIC states can be sustained, enabling weakly damped embedded Rabi oscillations of photons between the waveguides. (C) 2021 Optical Society of America

Automated summary

In this study, a simple photonic structure is investigated, and it is shown that breaking mirror symmetry and allowing for non-nearest neighbor couplings can sustain a pair of quasi-BIC states, enabling weakly damped embedded Rabi oscillations of photons between the waveguides.