All-optical switching using nonlinear subwavelength Mach-Zehnder on silicon

Ivan Glesk, Przemek Bock, Pavel Cheben, Jens Schmid, Jean Lapointe, Siegfried Janz

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We report on the experimental demonstration of ultrafast all-optical switching and wavelength down-conversion based on a novel nonlinear Mach-Zehnder interferometer with subwavelength grating and wire waveguides. Unlike other periodic waveguides such as line-defects in a 2D photonic crystal lattice, a subwavelength grating waveguide confines the light as a conventional index-guided structure and does not exhibit optically resonant behaviour. Since the device had no dedicated port to input optical signal to control switching a new approach was also implemented for all-optical switching control.
Original languageEnglish
Pages (from-to)14031-14039
Number of pages9
JournalOptics Express
Issue number15
Publication statusPublished - 7 Jul 2011


  • crystal lattice
  • optics
  • all-optical switching
  • Mach-Zehnder interferometer

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