Silicon subwavelength photonics: from fundamentals to applications in optical interconnects, spectroscopy and biological sensing

Pavel Cheben, J. H. Schmid, P. J. Bock, Jean Lapointe, S. Janz, D X Xu, A Densmore, A Delage, R Ma, R Halir, B Lamontagne, A Ortega-Monux, I Molina-Fernandez, C.A. Ramos, J.M. Fedeli, M Ibrahim, W.N. Ye, Ivan Glesk, T.J. Hall

Research output: Contribution to conferencePaper


Recent advances in silicon photonics research at the National Research Council of Canada will be reviewed. A new type of microphotonic waveguides will be presented, exploiting the subwavelength grating (SWG) effect. The SWG technique [1] allows for engineering of the refractive index of a waveguide core over a range as broad as 1.5–3.5 simply by lithographic patterning using only two materials, for example Si and SiO2. Several examples of subwavelength grating waveguides and components implemented in silicon-on-insulator and operating at telecom wavelengths will be presented. These include waveguide crossings with minimal loss (<0.03 dB) and negligible crosstalk, fibre-chip edge couplers with a loss <1 dB, apodised surface grating couplers, high-performance MMI couplers, polarization rotators, athermal waveguides and planar waveguide multiplexers. Emerging applications in spectroscopy and biological sensing will be discussed.
Original languageEnglish
Publication statusPublished - 1 Dec 2011
EventAdvanced Technology Institute Seminar - Guildford, United Kingdom
Duration: 1 Dec 20111 Dec 2011


ConferenceAdvanced Technology Institute Seminar
CountryUnited Kingdom


  • silicon subwavelength photonics
  • optical interconnects
  • biological sensing
  • spectroscopy

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