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

By Niels Asger Mortensen, Sanshui Xiao, J. Pedersen. 2007

180 citations recorded by the source corpus.

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.

Subfields: Atomic and Molecular Physics, and Optics, Biomedical Engineering, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/009466d1e6b743555c76fabaedc7e3d0ce7cb27e

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In Atomic and Molecular Physics, and Optics

In Biomedical Engineering

In Electrical and Electronic Engineering

Citations in the corpus

On the performance quantification of resonant refractive index sensors. (2008, background): “Examples of optical RI sensors include surface plasmon resonance (SPR) [1], 2-D photonic crystal structure [2,3], long-period fiber grating (LPFG) [4,5], and various forms of ring resonators [6–15].”