High-order bandgaps in one-dimensional photonic crystals

G. V. Morozov, F. Placido

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6 Citations (Scopus)


Bandgaps, including high-order ones, of one-dimensional photonic crystals are analysed. Accurate analytical expressions for band edges for both s and p polarized light are derived. As a consequence, the conditions for bandgap closing are obtained in a simple analytical form. The derivation is based on a perturbative expansion of the dispersion equation using a new parameter which remains small around the band edges of all physically feasible one-dimensional photonic crystals.
Original languageEnglish
Article number045101
JournalJournal of Optics
Issue number4
Publication statusPublished - Apr 2010


  • bi-layer photonic crystal
  • bandgaps
  • perturbative expansion of dispersion equation


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