Robustness of bound states in the continuum in metasurface based on Ge${}_2$Sb${}_2$Te${}_5$ versus structural imperfections

Nikolai A. Vlasov, Alexander I. Solomonov, Zarina F. Kondratenko +3

We study the impact of lithography imperfections on quasi-bound states in the continuum (quasi-BICs) supported by a one-dimensional metasurface of Ge${}_2$Sb${}_2$Te${}_5$ (GST) bars wit…