Mid-infrared photonic crystal waveguides in silicon

Christian Reimer*, Milos Nedeljkovic, David J. M. Stothard, Matthieu O. S. Esnault, Christopher Reardon, Liam O'Faolain, Malcolm Dunn, Goran Z. Mashanovich, Thomas F. Krauss

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)
4 Downloads (Pure)


We demonstrate the design, fabrication and characterization of mid-infrared photonic crystal waveguides on a silicon-on-insulator platform, showing guided modes in the wavelength regime between 2.9 and 3.9 mu m. The characterization is performed with a proprietary intra-cavity Optical Parametric Oscillator in a free space optical setup and with a fibre coupled setup using a commercial Quantum Cascade Laser. We discuss the use of an integrated Mach-Zehnder interferometer for dispersion measurements and report a measured group velocity of up to a value of n(g) = 12, and determine the propagation loss to be 20 dB/cm.

Original languageEnglish
Pages (from-to)29361-29368
Number of pages8
JournalOptics Express
Issue number28
Publication statusPublished - 31 Dec 2012


  • Cavities
  • Optical Parametric Oscillator
  • Quantum Cascade Laser
  • Mach-Zehnder interferometer


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