Photon-metal interactions, which is also widely known as Plasmonics, offers the possibility of optical energy localisation, which in turn leads to enhanced spectroscopic signal intensity and nano-optical-trapping, as well as many novel nanophotonic applications.

Despite widespread research efforts on the use of plasmonic resonance in sensing and functional wave devices, we have yet to see much reported work on using plasmonic absorption in microfluidics. In this paper we report new results on using plasmonic absorption in metallic nano-islands for optical tweezers and optofluidic applications including microfluidic valving, guided flow and sample mixing.

Plasmonic absorption offers a convenient strategy for optical actuation of fluidic samples with high degree of versatility. Potential outlooks of this technique will also be explored.

© 2015 Optical Society of America

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