Slow-light enhanced optical detection in liquid-infiltrated photonic crystals

Martin Erland Vestergaard Pedersen, Lars Søgaard Rishøj, Henrik Steffensen, Sanshui Xiao, Asger Mortensen

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Slow-light enhanced optical detection in liquid-infiltrated photonic crystals is theoretically studied. Using a scattering-matrix approach and the Wigner–Smith delay time concept, we show that optical absorbance benefits both from slow-light phenomena as well as a high filling factor of the energy residing in the liquid. Utilizing strongly dispersive photonic crystal structures, we numerically demonstrate how liquid-infiltrated photonic crystals facilitate enhanced light–matter interactions, by potentially up to an order of magnitude. The proposed concept provides strong opportunities for improving existing miniaturized absorbance cells for optical detection in lab-on-a-chip systems.
Original languageEnglish
JournalOptical and Quantum Electronics
Volume39
Issue number10-11
Pages (from-to)903-911
ISSN0306-8919
DOIs
Publication statusPublished - 2007

Keywords

  • Slow light
  • Optofluidics
  • Sensing
  • Photonic crystals

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