All-Optical Switching at the Fano Resonances in Subwavelength Gratings with Very Narrow Slits

Abstract

We theoretically discuss all-optical switching at the Fano resonances of subwavelength gratings made of a chalcogenide glass (As2S3). Particular attention is devoted to the case in which the grating possesses extremely narrow slits (channels ranging from alpha approximately 10nm to alpha approximately 40nm). The remarkable local field enhancement available in these situations conspires to yield low-threshold switching intensities (approximately 50MW=sq cm) at telecommunication wavelengths for extremely thin (d approximately 200nm) gratings when a realistic value of the As2S3 cubic nonlinearity is used.

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Document Details

Document Type
Technical Report
Publication Date
May 23, 2011
Accession Number
ADA544327

Entities

People

  • D. De Ceglia
  • G. D'aguanno
  • M. J. Bloemer
  • N. Mattiucci

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Bulk Materials
  • Chalcogenide Glass
  • Diffraction
  • Experimental Data
  • Films
  • Glass
  • Gratings (Spectra)
  • Kerr Effects
  • Materials
  • Optical Materials
  • Optical Switching
  • Photonic Crystals
  • Q Factor
  • Refractive Index
  • Resonance
  • Switching
  • Thin Films

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Optical Physics and Photonics.