Microfluidics and Nanofluidics

, Volume 4, Issue 1, pp 117–127

Liquid-infiltrated photonic crystals: enhanced light-matter interactions for lab-on-a-chip applications

  • Niels Asger Mortensen
  • Sanshui Xiao
  • Jesper Pedersen
Research Paper

DOI: 10.1007/s10404-007-0203-2

Cite this article as:
Mortensen, N.A., Xiao, S. & Pedersen, J. Microfluid Nanofluid (2008) 4: 117. doi:10.1007/s10404-007-0203-2

Abstract

Optical techniques are finding widespread use in analytical chemistry for chemical and bio-chemical analysis. During the past decade, there has been an increasing emphasis on miniaturization of chemical analysis systems and naturally this has stimulated a large effort in integrating microfluidics and optics in lab-on-a-chip microsystems. This development is partly defining the emerging field of optofluidics. Scaling analysis and experiments have demonstrated the advantage of micro-scale devices over their macroscopic counterparts for a number of chemical applications. However, from an optical point of view, miniaturized devices suffer dramatically from the reduced optical path compared to macroscale experiments, e.g. in a cuvette. Obviously, the reduced optical path complicates the application of optical techniques in lab-on-a-chip systems. In this paper we theoretically discuss how a strongly dispersive photonic crystal environment may be used to enhance the light-matter interactions, thus potentially compensating for the reduced optical path in lab-on-a-chip systems. Combining electromagnetic perturbation theory with full-wave electromagnetic simulations we address the prospects for achieving slow-light enhancement of Beer–Lambert–Bouguer absorption, photonic band-gap based refractometry, and high-Q cavity sensing.

Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • Niels Asger Mortensen
    • 1
  • Sanshui Xiao
    • 1
  • Jesper Pedersen
    • 1
  1. 1.MIC, Department of Micro and Nanotechnology, NanoDTUTechnical University of DenmarkKongens LyngbyDenmark