The focusing performance of an aperiodic double layer metallic grating

Long Ma, Jie Lin, Peng Jin, Philip Prewett, Zhengang Lu, Jiubin Tan

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Abstract

In this paper, a double-layer aperiodic metallic grating is designed and the focusing performance is numerically researched using the finite-difference time-domain method. A sub-wavelength focusing spot is achieved and the depth of focus is twice the length of the incident wavelength. With its ease of fabrication, the designed aperiodic double-layer metallic grating has great potential in applications such as data storage, laser direct writing and optical probe.
Original languageEnglish
Pages (from-to)112-116
JournalMicroelectronic Engineering
Volume123
Early online date2 Jun 2014
DOIs
Publication statusPublished - 1 Jul 2014

Keywords

  • Focusing performance
  • Aperiodic grating
  • Metallic subwavelength structure

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