Localized surface plasmon resonance in laser-deposited gold nanoparticle layers for total internal reflection based optical sensors

The localized surface plasmon resonance (LSPR) of laser-deposited gold nanoparticle layers has been investigated using spectral tansmission, total internal reflectometry and total internal reflection ellipsometry (TIRE). The LSPR characteristics depend on the size and density of nanoparticles within the layers which in turn can be adjusted to a certain extent through the laser process parameters and that with the high spatial resolution provided by the laser beam. Moreover it appears that the use of total internal reflection (TIR) as a readout configuration can significantly enhance The localized surface plasmon resonance (LSPR) of laser-deposited gold nanoparticle layers has been investigated using spectral tansmission, total internal reflectometry and total internal reflection ellipsometry (TIRE). The LSPR characteristics depend on the size and density of nanoparticles within the layers which in turn can be adjusted to a certain extent through the laser process parameters and that with the high spatial resolution provided by the laser beam. Moreover it appears that the use of total internal reflection (TIR) as a readout configuration can significantly enhance LSPR-based sensors sensitivity to refraction index variations in probed liquid samples in comparison to the transmission read-out configuration. The laser implementation of LSPR-supporting nanoparticles in a lab-on-a-chip device integrating a TIR-based multiplexed optical read-out system is discussed here in the frame of biopesticides detection.-based sensors sensitivity to refraction index variations in probed liquid samples in comparison to the transmission read-out configuration. The laser implementation of LSPR-supporting nanoparticles in a lab-on-a-chip device integrating a TIR-based multiplexed optical read-out system is discussed here in the frame of biopesticides detection.