4 papers · 1 filter
Automated identification of quasi-BIC modes in disordered resonator chains using spatial field envelopes and resonance descriptors
Vadim A. Porvatov, Kliment V. Semushev, Ravshanjon Kh. Nazarov +4
Structural disorder turns bound states in the continuum (BICs) into quasi-BIC resonances and mixes them with spectrally close eigenmodes, so the target mode must be identified anew…
Phase-Flow Topology of Bound States in the Continuum
Nikolai A. Vlasov, Varvara P. Panurchenko, Ravshanjon Kh. Nazarov +3
Control of topological charges of bound states in the continuum (BICs) is essential for advanced topological photonics. A rigorous theoretical framework for understanding the forma…
Robustness of bound states in the continuum in metasurface based on GeSbTe 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 GeSbTe (GST) bars wit…
Angular momentum flux of twisted light in paraxial and nonparaxial regimes
N. A. Vlasov, N. V. Filina, S. S. Baturin
We present a theoretical framework for the derivation of the -directed total angular momentum density of a Bessel wave and of the corresponding intercepted angular momentum flux…