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physics.app-ph2021★ 32 cited
Quasi-normal mode theory of the scattering matrix, enforcing fundamental constraints for truncated expansions
Mohammed Benzaouia, John D. Joannopoulos, Steven G. Johnson +1
We develop a quasi-normal mode theory (QNMT) to calculate a system's scattering matrix, simultaneously satisfying both energy conservation and reciprocity even for a small trun…
physics.app-ph2021★ 12 cited
Analytical criteria for designing multiresonance filters in scattering systems, with application to microwave metasurfaces
Mohammed Benzaouia, John D. Joannopoulos, Steven G. Johnson +1
We present general analytical criteria for the design of lossless reciprocal two-port systems, which exhibit prescribed scattering spectra satisfying $S_{22}(ω)=e^{iφ}S_{11}…