Slow-light enhanced absorption for bio-chemical sensing applications: potential of low-contrast lossy materials

Jesper Goor Pedersen, Sanshui Xiao, Niels Asger Mortensen

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Slow-light enhanced absorption in liquid-infiltrated photonic crystals has recently been proposed as a route to compensate for the reduced optical path in typical lab-on-a-chip systems for bio-chemical sensing applications. A simple perturbative expression has been applied to ideal structures composed of lossless dielectrics. In this work we study the enhancement in structures composed of lossy dielectrics such as a polymer. For this particular sensing application we find that the material loss has an unexpected limited drawback and surprisingly, it may even add to increase the bandwidth for low-index contrast systems such as polymer devices. [DOI: 10.2971/jeos.2008.08007]
Original languageEnglish
Article number08007
JournalJournal of the European Optical Society - Rapid Publications
Publication statusPublished - 2008


  • Biosensor
  • slow light
  • optofluidics
  • photonic crystal

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