Talbot imaging with increased spatial frequency: A technique for replicating truncated self-imaging objects

Wei Hung Yeh, M. Mansuripur, M. Fallahi, R. Scott Penner

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

The Talbot effect in the presence of a convergent beam of coherent light yields a demagnified image of a self-imaging object. In fact, the object does not even have to fulfill the self-imaging condition; the object with truncated self-imaging feature is sufficient to yield an image that is sufficiently accurate for many practical purposes. We have taken this approach to fabricating circular gratings with a reduced period compared to the period of the mask. Using a simple experimental setup and a concentric circular grating mask, we have created images whose periods are either one-half or one-third of the mask's period. Demagnified Talbot imaging of fully or truncated self-imaging objects provides an attractive approach to photolithographic fabrication of structures whose periods are somewhat greater than the wavelength of the light source.

Original languageEnglish (US)
Pages (from-to)207-212
Number of pages6
JournalOptics Communications
Volume170
Issue number4
DOIs
StatePublished - Nov 1 1999

ASJC Scopus subject areas

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

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