Effective grating theory for resonance domain surface-relief diffraction gratings

Michael A. Golub, Asher A. Friesem

Research output: Contribution to journalArticlepeer-review

Abstract

An effective grating model, which generalizes effective-medium theory to the case of resonance domain surface-relief gratings, is presented. In addition to the zero order, it takes into account the first diffraction order, which obeys the Bragg condition. Modeling the surface-relief grating as an effective grating with two diffraction orders provides closed-form analytical relationships between efficiency and grating parameters. The aspect ratio, the grating period, and the required incidence angle that would lead to high diffraction efficiencies are predicted for TE and TM polarization and verified by rigorous numerical calculations.

Original languageEnglish
Pages (from-to)1115-1126
Number of pages12
JournalJournal of the Optical Society of America A: Optics and Image Science, and Vision
Volume22
Issue number6
DOIs
StatePublished - Jun 2005
Externally publishedYes

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