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Keywords:

  • Deformations;
  • Fabry-Perot structures;
  • Fibers;
  • Microcavity;
  • Photonic bandgap (PBG)

The design, fabrication, and characterization of polymeric yarns (see Figure and cover) with large photonic bandgaps and omnidirectional reflectivity combined with a micro-cavity designed for near-infrared applications are reported. The reversible shift of the resonant wavelength of this single-mode optical cavity under applied strain is also demonstrated. Passive and active applications include narrow band-pass filters and low-threshold lasers.