Subwavelength-grating-induced wavefront aberrations: A case study

Karlton Crabtree, Russell A. Chipman

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


The on-axis wavefront aberrations of a one-dimensional subwavelength- grating antireflection coating on an f/1.7 lens surface are shown to be small with noticeable contributions of defocus, astigmatism, and piston. The astigmatism is 0.02 wave, and the magnitude of the piston approaches one wave peak-to-valley. The difference in aberrations between orthogonally polarized wavefronts, or the retardance aberration, shows 0.01 wave of astigmatismlike variation and more than 0.01 wave of retardance-induced defocuslike variation. A small coupling between polarization states occurs in the form of the familiar Maltese cross, yielding a maximum of 3% coupling in the four diagonal edges of the pupil.

Original languageEnglish (US)
Pages (from-to)4549-4554
Number of pages6
JournalApplied optics
Issue number21
StatePublished - Jul 20 2007

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering


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