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The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including by researchers from the Department of Computer & Information Sciences involved in mathematically structured programming, similarity and metric search, computer security, software systems, combinatronics and digital health.

The Department also includes the iSchool Research Group, which performs leading research into socio-technical phenomena and topics such as information retrieval and information seeking behaviour.

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

Cheben, Pavel and Schmid, J. H. and Bock, P. J. and Lapointe, Jean and Janz, S. and Xu, D X and Densmore, A and Delage, A and Ma, R and Halir, R and Lamontagne, B and Ortega-Monux, A and Molina-Fernandez, I and Ramos, C.A. and Fedeli, J.M. and Ibrahim, M and Ye, W.N. and Glesk, Ivan and Hall, T.J. (2011) Silicon subwavelength photonics : from fundamentals to applications in optical interconnects, spectroscopy and biological sensing. In: Advanced Technology Institute Seminar, 2011-12-01 - 2011-12-01.

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Abstract

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.