Synthesizing quasi-bound states in the continuum in epsilon-near-zero layered materials

Bound states in the continuum (BIC) are highly confined, nonradiative modes that can exist open structures, despite their potential compatibility and coupling with radiation spectrum, may give rise to resonances arbitrary large lifetimes. Here, we study this phenomenon layered materials featuring epsilon-near-zero constituents. Specifically, outline a systematic procedure synthesize quasi-BIC at given frequency, incidence angle, polarization investigate role of certain critical parameters establishing quality factor resonances. Moreover, also provide an insightful phenomenological interpretation terms recently introduced concept “photonic doping” effects unavoidable material loss dispersion. Our results indicate possibility synthesizing sharp resonances, for both transversely magnetic electric polarizations, which interest variety nanophotonics scenarios, including light trapping, optical sensing, thermal radiation.