Generalized normal mode expansion method for open and lossy periodic structures

Sravya Rao, Guillaume Le Saux, Yonatan Sivan, Parry Y. Chen

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


We describe and demonstrate the extension of permittivity mode expansion, which is also know as generalized normal mode expansion (GENOME), to open and lossy periodic structures. The resulting expansion gives a complete spatial characterization of any open periodic structure, via the quasi-periodic Green's tensor, by a complete, discrete set of modes rather than a continuum. The method has been validated by comparing our expansion of an open waveguide array with a direct scattering calculation. Good agreement was obtained regardless of the source location or detuning from resonance.

Original languageEnglish
Pages (from-to)1338-1347
Number of pages10
JournalJournal of the Optical Society of America B: Optical Physics
Issue number5
StatePublished - 1 May 2022

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Atomic and Molecular Physics, and Optics


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