Simulation of the diffraction characteristics of a one-dimensional dual-periodicity superlattice

Katherine E. Weaver, Akhlesh Lakhtakia

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


The diffraction characteristics of a dual-periodicity superlattice-a diffraction grating whose unit cell contains two different regions, one homogeneous and the other periodically nonhomogeneous-were numerically simulated. After choosing the second region to have sinusoidally varying permittivity, the widely used rigorous coupled-wave approach was applied to compute the reflection and transmission efficiency spectrums. An extensive parametric study revealed that the dual-periodicity superlattice exhibits anomalies in the long-wavelength regime which can be considered to be resonance anomalies (RAs), which are distinct from the Rayleigh-Wood anomalies. Also, double-periodicity superlattices exhibit RAs at higher wavelengths than single-periodicity superlattices.

Original languageEnglish (US)
Pages (from-to)276-285
Number of pages10
Issue number6
StatePublished - May 1 2008

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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