Vapor sensing using a bio-inspired porous silicon photonic crystal

Jonathan Rasson, Olivier Poncelet, Sébastien R. Mouchet, Olivier Deparis, Laurent A. Francis

Research output: Contribution to journalArticlepeer-review


Naturally occurring photonic crystals present on the wing scales of Papilio butterflies are known to exhibit vivid iridescent coloration as well as various optical properties, including vapor sensing properties. This work reports the fabrication of a periodic array of concave multilayers in porous silicon mimicking the Papilio blumei nanostructure and its application as an optical vapor sensor. We compared the variations in the reflectance spectrum due to ethanol vapor adsorption and condensation inside the bio-inspired concave porous silicon multilayer structure to the variations of a standard flat porous silicon Bragg mirror. This results in an enhanced response time in the case of the bio-inspired concave structure.

Original languageEnglish
Pages (from-to)5006-5012
Number of pages7
JournalMaterials Today: Proceedings
Issue number4
Publication statusPublished - 2017
EventThe Living Light Conference 2016 - San Diego, United States
Duration: 4 May 20166 May 2016


  • Biomimetism
  • Ethanol vapor
  • Optical detection
  • Papilio butterfly
  • Porous silicon
  • Vapor sensor
  • photonic crystal


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