Who: François Lagugné-Labarthet. Western University, London, Ontario, Canada
Place: Donostia International Physics Center
Date: Thursday, 16 March 2017, 12:00
The use of efficient sensing technologies appears to be a field with tremendous activity mainly due to the connectivity of sensing devices on global network (internet of things and services) enabling immediate sharing of information valuable in a variety of fields such as industrial processes, food quality control, environmental monitoring and biomedical assessment. In this context the development of optical sensing devices appears to provide advantages such as high portability (small footprint, little sample preparation) and, in ideal conditions, an excellent specificity of detection.
Our group aim at developing metamaterials interfaced with spectroscopy and optical methods to enhance the detection of a variety of materials and biomaterials using advanced nano- and micro-scales optical imaging. Specifically, plasmon-mediated enhancements are used to further facilitate i)-the increase of surface-sensitivity of spectroscopic measurements and to ii)- increase local spatial resolution of the optical measurement beyond the diffraction limit.
In this seminar, we will review several research directions led in our group including the design and fabrication of advanced surface-enhanced platforms for Raman and Infrared measurements,1,2 development of Tip-enhanced Raman spectroscopy to probe biological processes at a sub 10 nm scale,3 and the extension of plasmon-mediated sensing to nonlinear optical processes such as second harmonic generation.4
1 M. Tabatabaei et al., Chemical Science, 2016, 7, 575-582.
2 G.Wallace et al. ACS Photonics, 2016, 3, 1723-1732
3 F. Pashaee et al., Analyst, 2016, 141, 3251-3258.
4 R. Hou et al., Phys. Chem. Chem. Phys., 2016, 18, 7956-7965.